ZXDSL 9836 ProductDescription
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary1
ZXDSL 9836 Product Description
Version Date Author Reviewer Notes
V1.0.0 2011/1/19Zongming
Lee
Fixed Network
Production
Department
First release
V1.0.1 2011/8/24Zongming
Lee
Fixed Network
Production
Department
Errata of uplink sub-card;
Erase SSTDF from system
V1.1.0 2012/1/6Zongming
Lee
Fixed Network
Production
Department
Latest ADSL2+/VDSL2/SHDSL/COMBO line
cards and some new features
V1.1.1 2012/5/25Yang
Guoliang
Fixed Network
Production
Department
Update the power
V2.0.0 2012/11/6Yang
Guoliang
Fixed Network
Production
Department
Latest line cards and some new features
V2.1.0 2013/8/29Yang
Guoliang
Fixed Network
Production
Department
V2.1.1 2013/11/7Yang
Guoliang
Fixed Network
Production
Department
Cabinets ,VDSL2 and VDSL2 COMBO cards
V2.1.2 2014/7/2 ZhouYaqiang
Fixed Network
Production
Department
Lightning protection feature
© 2015 ZTE Corporation. All rights reserved.
ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used
without the prior written permission of ZTE.
Due to update and improvement of ZTE products and technologies, information in this document is subjected to
change without notice.
ZXDSL 9836 Product Description
2ZTE Confidential & Proprietary
TABLE OF CONTENTS
1 Overview............................................................................................................................8
2 Features.............................................................................................................................92.1 Advanced System Architecture....................................................................................... 92.2 Innovative techniques..................................................................................................... 102.3 Green Environment Protection Design.........................................................................102.4 High Reliability................................................................................................................. 112.5 Convenient Installation and Fast Deployment............................................................ 112.6 High Maintainability and Touch-Free O&M................................................................. 122.7 Multiple Types of Application Environment................................................................. 122.8 Cost Effectiveness and Investment Protection........................................................... 13
3 System Architecture.................................................................................................... 153.1 Product Appearance....................................................................................................... 153.2 Hardware Architecture.................................................................................................... 163.2.1 Hardware Architecture Diagram.................................................................................... 163.2.2 Cards................................................................................................................................. 173.3 Cabinet..............................................................................................................................453.3.1 OUT50ET..........................................................................................................................453.3.2 EC50EC-S........................................................................................................................ 463.4 Software Architecture......................................................................................................463.4.1 NM Sub-system............................................................................................................... 473.4.2 Broadband Sub-system.................................................................................................. 473.4.3 Narrowband Sub-system................................................................................................473.4.4 Bearer Sub-system..........................................................................................................473.4.5 Operation Support Sub-system.....................................................................................47
4 Functions........................................................................................................................ 484.1 DSL Specification............................................................................................................ 484.1.1 ADSL2/2+..........................................................................................................................484.1.2 VDSL2............................................................................................................................... 504.1.3 SHDSL...............................................................................................................................544.1.4 Interworking Function (IWF)...........................................................................................554.1.5 Vectoring (G.VECTOR / DSM L3).................................................................................564.2 GPON................................................................................................................................ 584.2.1 Standards Followed.........................................................................................................584.2.2 Bandwidth Allocation.......................................................................................................594.2.3 GEM Adaptation...............................................................................................................594.2.4 T-CONT.............................................................................................................................59
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary3
4.2.5 Operation and Maintenance...........................................................................................594.2.6 Optical Linkage Measurement and Diagnosis............................................................ 604.2.7 Fiber Protection Alternation............................................................................................604.3 EPON.................................................................................................................................604.3.1 Standards Followed.........................................................................................................604.3.2 System Registration and Authentication...................................................................... 614.3.3 Logical Link Identification (LLID)...................................................................................624.3.4 Operation Administration and Maintenance (OAM)................................................... 624.3.5 Dynamic Bandwidth allocation (DBA)...........................................................................624.3.6 Fiber Protection Alternation............................................................................................624.3.7 Optical Linkage Measurement and Diagnosis............................................................ 634.4 10GEPON.........................................................................................................................634.4.1 Standards Followed.........................................................................................................634.4.2 System Registration and Authentication...................................................................... 644.4.3 Logical Link Identification (LLID)...................................................................................654.4.4 Operation Administration and Maintenance (OAM)................................................... 654.4.5 Dynamic Bandwidth allocation (DBA)...........................................................................654.4.6 Fiber Protection Alternation............................................................................................664.4.7 Optical Linkage Measurement and Diagnosis............................................................ 664.5 L2 Functions.....................................................................................................................664.5.1 L2 BRIDGE Functions.....................................................................................................664.5.2 VLAN Functions...............................................................................................................694.5.3 Ethernet OAM Functions................................................................................................ 724.6 QoS....................................................................................................................................754.6.1 Service Stream Classification and Identification........................................................ 754.6.2 Congestion Management............................................................................................... 754.6.3 Traffic Analysis and Integer............................................................................................764.7 Multicast Functions..........................................................................................................764.7.1 IGMP..................................................................................................................................764.7.2 Multicast Control.............................................................................................................. 774.8 VoIP................................................................................................................................... 804.8.1 Voice processing protocol and encoding..................................................................... 804.8.2 Voice management module........................................................................................... 824.8.3 Other services.................................................................................................................. 834.8.4 Line Test (112)..................................................................................................................854.8.5 Voice Quality Guarantee.................................................................................................854.9 IPv6 Function................................................................................................................... 864.9.1 IPv6 Transparent Transmission.................................................................................... 864.9.2 IPv6 Stateless Address Auto Configuration (SLAAC) Port Positioning.................. 864.9.3 IPv6 DHCPv6 Port Positioning...................................................................................... 864.9.4 IPv6 Source Guard..........................................................................................................874.9.5 IPv6 Multicast...................................................................................................................88
ZXDSL 9836 Product Description
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4.9.6 MLD Proxy........................................................................................................................ 894.9.7 IPv6 Management........................................................................................................... 904.10 Security............................................................................................................................. 904.10.1 xPON Interface Data Security....................................................................................... 904.10.2 Port Location.................................................................................................................... 904.10.3 Traffic Restraint................................................................................................................914.10.4 MAC Filter.........................................................................................................................924.10.5 IP Filtering.........................................................................................................................934.10.6 ACL.................................................................................................................................... 944.10.7 Interface Security.............................................................................................................954.10.8 802.1x................................................................................................................................954.11 Network Management.....................................................................................................964.11.1 Management modes....................................................................................................... 964.11.2 Fault Management...........................................................................................................974.11.3 Performance Management.............................................................................................984.11.4 Security Management.....................................................................................................984.11.5 Modem Remote Management.......................................................................................994.12 Environment Detection................................................................................................. 100
5 Application Mode........................................................................................................1025.1 Network Architecture.....................................................................................................1025.1.1 P2MP Network............................................................................................................... 1025.1.2 P2P Network.................................................................................................................. 1035.2 Service Type.................................................................................................................. 1055.2.1 Broadband data Service and Network....................................................................... 1055.2.2 VoIP Service and Network........................................................................................... 1065.2.3 Video Service and Network......................................................................................... 1075.2.4 DDN Service and Network...........................................................................................1075.2.5 Triple-play Service and Network................................................................................. 108
6 Technical Specifications.......................................................................................... 1106.1 Equipment Specifications and Environment Indices................................................1106.2 Interface Indices and Parameters...............................................................................1116.3 Key Technical Specifications.......................................................................................1176.4 Indicators........................................................................................................................ 118
7 Glossary........................................................................................................................121
8 Standard Compliance................................................................................................126
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FIGURES
Figure 3- 1 ZXDSL 9836 Appearance (Front view)..................................................................... 15
Figure 3- 2 ZXDSL 9836 Appearance (Front view)-with Vectoring...........................................15
Figure 3- 3 ZXDSL 9836 Appearance (Side view)...................................................................... 16
Figure 3- 4 ZXDSL 9836 Appearance (Side view) -with Vectoring...........................................16
Figure 3- 5 ZXDSL 9836 System Module Layout........................................................................ 16
Figure 3- 6 ZXDSL 9836 System Architecture............................................................................. 17
Figure 3- 7 ZXDSL 9836 SCMF Panel.......................................................................................... 25
Figure 3- 8 ZXDSL 9836 SCMF Hardware Architecture.............................................................25
Figure 3- 9 ZXDSL 9836 CTMV Panel.......................................................................................... 28
Figure 3- 10 ZXDSL 9836 CTMV Hardware Architecture.......................................................... 28
Figure 3- 11 ZXDSL 9836 SVCE Panel........................................................................................ 29
Figure 3- 12 ZXDSL 9836 ADSL2/2+ Panel.................................................................................30
Figure 3- 13 ZXDSL 9836 ADSL2/2+ Card Hardware Architecture..........................................31
Figure 3- 14 ZXDSL 9836 VDSL2 Card Panel.............................................................................33
Figure 3- 15 ZXDSL 9836 VDSL2 Card Hardware Architecture............................................... 33
Figure 3- 16 ZXDSL 9836 SSTDF Card Panel............................................................................ 35
Figure 3- 17 ZXDSL 9836 SHDSL Card Hardware Architecture...............................................35
Figure 3- 18 ZXDSL 9836 COMBO Panel.................................................................................... 37
Figure 3- 19 ZXDSL 9836 COMBO Card Hardware Architecture.............................................37
Figure 3- 20 ZXDSL 9836 POTS Card Panel...............................................................................39
Figure 3- 21 ZXDSL 9836 POTS Card Hardware Architecture................................................. 39
Figure 3- 22 ZXDSL 9836 ETCD Panel........................................................................................ 40
Figure 3- 23 ZXDSL 9836 ETCF Panel.........................................................................................40
Figure 3- 24 ZXDSL 9836 Ethernet Card Hardware Architecture.............................................40
Figure 3- 25 ZXDSL 9836 AC Power Card Panel........................................................................42
Figure 3- 26 ZXDSL 9836 DC Power Card Panel....................................................................... 42
Figure 3- 27 ZXDSL 9836 Fan Unit Panel.................................................................................... 44
Figure 3- 28 ZXDSL 9836 fan unit and main control card relationship.................................... 44
ZXDSL 9836 Product Description
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Figure 3- 29 ZXDSL 9836 Software Architecture........................................................................ 46
Figure 4- 1 Schematic Diagram of ATM-Ethernet IWF............................................................... 55
Figure 4- 2 ZXDSL 9836 Fiber Protection (GPON)..................................................................... 60
Figure 4- 3 ZXDSL 9836 Fiber Protection (EPON)......................................................................63
Figure 4- 4 ZXDSL 9836 Fiber Protection (10GEPON)..............................................................66
Figure 4- 5 Ethernet OAM Architecture......................................................................................... 73
Figure 4- 6 IEEE 802.1ag Architecture..........................................................................................74
Figure 4- 7 Schematic Diagram of ZXDSL 9836 IPv6 Multicast................................................88
Figure 5- 1 ZXDSL 9836 Application in P2MP Network (FTTC/Cab).....................................103
Figure 5- 2 ZXDSL 9836 Application in P2P Network.............................................................. 104
Figure 5- 3 ZXDSL 9836 Data Service Application................................................................... 105
Figure 5- 4 ZXDSL 9836 VoIP Service Application...................................................................106
Figure 5- 5 ZXDSL 9836 IPTV Service Application...................................................................107
Figure 5- 6 ZXDSL 9836 DDN Service Application...................................................................108
Figure 5- 7 ZXDSL 9836 Triple-play Application....................................................................... 109
TABLES
Table 3- 1 Cards Specifications......................................................................................................18
Table 3- 2 Uplink Sub-card Description.........................................................................................26
Table 3- 3 SCMF Key Features......................................................................................................27
Table 3- 4 CTMV Features..............................................................................................................28
Table 3- 5 SVCE Features.............................................................................................................. 29
Table 3- 6 ADSL2/2+ Cards............................................................................................................ 30
Table 3- 7 ADSL2/2+ Card Features............................................................................................. 31
Table 3- 8 VDSL2 Cards..................................................................................................................32
Table 3- 9 VDSL2 Card Features...................................................................................................34
Table 3- 10 SHDSL Cards...............................................................................................................34
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Table 3- 11 SHDSL Card Features................................................................................................35
Table 3- 12 COMBO Card............................................................................................................... 36
Table 3- 13 COMBO Card Features.............................................................................................. 37
Table 3- 14 POTS Cards................................................................................................................. 38
Table 3- 15 POTS Card Features.................................................................................................. 39
Table 3- 16 Ethernet Card Features.............................................................................................. 41
Table 3- 17 Power Card Features..................................................................................................43
Table 3- 18 Fan Unit Features........................................................................................................44
Table 6- 1 ZXDSL 9836 Specifications....................................................................................... 110
Table 6- 2 ZXDSL 9836 Environment Indices............................................................................111
Table 6- 3 ZXDSL 9836 ADSL2/2+ Interfaces...........................................................................111
Table 6- 4 ZXDSL 9836 VDSL2 Interfaces.................................................................................112
Table 6- 5 ZXDSL 9836 SHDSL Interfaces................................................................................112
Table 6- 6 ZXDSL 9836 POTS Interfaces.................................................................................. 112
Table 6- 7 ZXDSL 9836 Ethernet Megabit Interface (SNI and UNI).......................................113
Table 6- 8 ZXDSL 9836 Ethernet Gigabit Interface (SNI and UNI)........................................ 114
Table 6- 9 ZXDSL 9836 GPON Optical Interfaces....................................................................114
Table 6- 10 ZXDSL 9836 EPON Optical Interfaces.................................................................. 115
Table 6- 11 ZXDSL 9836 10GEPON Interfaces........................................................................ 116
Table 6- 12 ZXDSL 9836 Key Technical Specifications...........................................................117
Table 6- 13 ZXDSL 9836 Indicators............................................................................................ 118
Table 7- 1 Glossary........................................................................................................................ 121
Table 8- 1 Standard Compliance..................................................................................................126
ZXDSL 9836 Product Description
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1 OverviewIn a new wave of bandwidth acceleration campaign, Telcos increasingly keep their eye
on FTTx solution with high bandwidth while no extra investment. Medium or small size
all-service MDU with capacity of 200L or so is a good combination of cost and bandwidth,
offering one-stop services including VoIP, HSI, IPTV as well as legacy DDN.
The ZXDSL 9836, a 3U-height box, is medium/small size MDU customized for various
FTTx scenarios, providing up to 192L for broadband, 384L for narrowband, with the aim
of cutting TCO tremendously while raising bandwidth. Highest integration and density
just in 3U-height box, provides up to 192L ADSL2/2+, 192L VDSL2, 96L SHDSL.bis,
384L POTS, 192L COMBO (ADSL2/2+ or VDSL2 and POTS) and 96L FE. Various uplink
interfaces including GE, EPON, GPON and even 10G EPON, support diverse uplink
protection mechanisms and various topologies like P2P, P2MP, ring, star and chain to
meet operators’ different requirements.
The ZXDSL 9836 is designed on the basis of IP technology. It adopts the same
architecture, hardware and software platform as the ZXDSL 9806H series, backward
compatible with the ZXDSL 9806H in terms of all line cards to cut the cost of logistics,
warehousing and maintenance. Compact 3U-height design, fits FTTC/B application
scenarios, easy to be installed in various integrated closure and outdoor cabinet, meets
operator requirements for fast time-to-delivery, flexible and economical deployment.
The ZXDSL 9836 (3U), with the ZXDSL 9806H (2U) and the ZXDSL 9816 (1U) together,
cover all FTTx scenarios from 16, 24, 48, 96 to 128, 192, 256 and 384 lines of narrow,
broadband or hybrid narrowband and broadband access, meet network developing trend,
which features increasing flatter network, less node while larger node capacity.
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2 FeaturesThe ZXDSL 9836 is the world’s first system-level VDSL2 vectoring equipment,
exhibited as prototype in BBWF as early as in October, 2010.
In BBWF, 2011, the ZXDSL 9836 was shortlisted for two InfoVision awards:
“Broadband Innovation of the Year” and “Broadband Access Network Technologies
and Services-Fixed” for its’ innovative VDSL2 vectoring solution.
On September 19, at the 13th edition of the annual ICCC (International Common
Criteria Conference) held in Paris, France, the ZXDSL 9836 was issued by
Norway’s National Certification Authority a “CC Certificate for ZTE’s Access
System”.
2.1 Advanced System Architecture
The ZXDSL 9836 has advanced system architecture with the following features:
It applies integration theory in design with proper chip layout thus reducing the
difficulties in production and process while increasing system stability.
Its system architecture has powerful scalability which ensures meeting the
increasing requirements for future bandwidth and services.
It adopts 3U-height plug-in card design which features high integration and flexibility,
thus gaining leading position in capacity and performance.
Excellent performance enables VDSL2 and FE symmetric 100 Mbps bandwidth.
It is able to provide carrier-class operation and management, and multi-service
integration and multi-access methods.
It is a multi-service integrated platform which effectively decreases networking
nodes and layers.
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2.2 Innovative techniques
ZTE has released world’s first system-level VDSL2 vectoring prototype, the ZXDSL 9836,
with following features:
The introduction of the special vectoring card allows the ZXDSL 9836 to be
smoothly upgraded and configured to support vectoring. It can support up to 192
VDSL2 lines with centralized vectoring processing, the transmitted and received
signals on every copper can be corporately processed in the central vectoring
engine.
It automatically analyzes crosstalk between copper pairs and cancels it, achieving
improved VDSL performance.
Based on system-level vectoring technology, it supports from 32L up to 192L
vectoring, covering from small-capacity FTTB (Fiber-to-the-Building) node to
large-capacity FTTC (Fiber-to-the-cabinet) node.
The introduction of vectoring technology increases the performance of copper lines,
extend the network’s reach and prolong the life cycle of copper cables.
2.3 Green Environment Protection Design
The ZXDSL 9836 features environment-friendly design as follows:
Unique system architecture and good layout design reduce system power
consumption dramatically.
It uses eco-friendly and lead-free material to protect users from being hurt.
Speed-adjustable fan based on ambient temperature make it suitable for working in
quiet environment such as offices and residential area.
Intelligent power-saving policy can prolong duration of voice services by powering
off broadband services when battery begins to work.
ZXDSL 9836 Product Description
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Highly efficient power application solution decreases system power consumption
and saves energy.
It adopts management chips and auxiliaries with advanced technique and low
power consumption to save energy.
It adopts POTS short-loop voice technology to ensure its performance and
decrease power consumption at the same time.
2.4 High Reliability
The ZXDSL 9836 has high reliability with the following features:
Strict in components selection, advanced processing technique and outstanding
thermal design enable equipment to work in various environments.
Advanced system architecture greatly saves internal interfaces thus promote
product performance and reliability.
Anti-corrosion design of cards and assemblies enables the ZXDSL 9836 to work in
various types of hard environment with extremely low fault rate.
Its outstanding heat dispersing design ensures equipment stable operation.
Supports reliable lightning protection of 6 kV for the power interface and 4 kV for the
user interface.
It has an overheat alarm mechanism to protect equipment from overheat damage.
2.5 Convenient Installation and Fast Deployment
The ZXDSL 9836 features convenient installation and fast deployment as follows:
The ZXDSL 9836 is a type of small-sized equipment which occupies small space
and is convenient for deployment.
Plug and play design ensures simple commission.
ZXDSL 9836 Product Description
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On-site deployment and batch configuration without the need of extra software
debugging.
2.6 High Maintainability and Touch-Free O&M
The ZXDSL 9836 features high maintainability and touch-free O&M as follows:
Unified remote operation and maintenance solution.
Multiple remote diagnosis and test methods: Supports broadband port loop check
and POTS internal and external line check.
OLS check: Supports fiber breakage check, optical linkage test and diagnosis,
auxiliary fiber trouble positioning and troubleshooting.
Real-time and remote environment surveillance including temperature, power and
door alarm.
Periodically key devices self-inspection: Supports intelligent reset mechanism,
providing critical fault early warning and self-recovery mechanism.
Software version rollback: Providing safer upgrading policy.
2.7 Multiple Types of Application Environment
The ZXDSL 9836 has multiple types of application environment with the following
features:
Various networking topologies, including P2P, P2MP, star, chain and ring.
Supports data, voice and video service and can work as DSLAM, MDU or AG
equipment, providing multi-play services for residential and commercial subscribers.
Supports FTTN, FTTB, FTTC and FTTCab application in PON network with
powerful scalability.
ZXDSL 9836 Product Description
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Provides multiple broadband access technologies such as ADLS2, VDSL2 and FE,
and provides flexible solutions for subscribers who are different in terms of distance
and bandwidth.
Supports indoor and outdoor installation.
Provides AC and DC power supply application and adapts to various power
environments and supports high-voltage DC input.
High temperature adaptability.
2.8 Cost Effectiveness and Investment Protection
The ZXDSL9836 features low cost and high investment conservation and return as
follows:
Backward compatibility with the ZXDSL 9806H in terms of line card, which cuts the
cost of logistics, warehousing and maintenance.
PON technology adaptation, which leads to fiber saving, decreases CAPEX
effectively.
Green environment protection technology adoption, which leads to consumption
decreasing, decreases OPEX effectively.
The ZXDSL 9836 fulfills main-stream carriers’ requirements of less equipment
dimensions and more density. Comparing with other dimension-similar products,
the ZXDSL 9836 is able to provide higher integration and wider subscriber coverage,
thus decreasing cost per line and carriers’ investment.
The ZXDSL 9836 is able to make use of the existing copper lines so to decrease
carriers’ investment and protect carriers’ previous investment.
Flexible card configuration design enables various networking modes in all kinds of
environment. It is simple and convenient for carriers to expand capacity or upgrade
access method. This effectively protects carriers’ investment.
ZXDSL 9836 Product Description
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Super scalability of system architecture is able to fulfill sustainable development
requirements of bandwidth and services. This also protects carriers’ investment.
Convenient installation design requires no special technicians thus decreases
carriers’ labor cost.
ZXDSL 9836 Product Description
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3 System Architecture
3.1 Product Appearance
Figure 3- 1, Figure 3- 2, Figure 3- 3 and Figure 3- 4 display the ZXDSL 9836 front view
and side view.
The ZXDSL 9836 is standard plug-in box with dimensions of 132.9 mm × 482.6 mm ×
240 mm (Height x Width x Depth).
Figure 3- 1 ZXDSL 9836 Appearance (Front view)
Figure 3- 2 ZXDSL 9836 Appearance (Front view)-with Vectoring
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Figure 3- 3 ZXDSL 9836 Appearance (Side view)
Figure 3- 4 ZXDSL 9836 Appearance (Side view) -with Vectoring
3.2 Hardware Architecture
3.2.1 Hardware Architecture Diagram
The ZXDSL 9836 is a box type of equipment with configurable plug-in cards.
Figure 3- 5 ZXDSL 9836 System Module Layout
ZXDSL 9836 Product Description
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The ZXDSL 9836 system is composed of one plug-in box, one backplane, one fan card,
one power card, one co-process card, one vectoring co-process card, one main control
card containing uplink sub-card, and multiple types of subscriber cards including
ADSL2/2+ subscriber card, VDSL2 subscriber card, SHDSL subscriber card, Ethernet
subscriber cards, COMBO subscriber card (ADSL2/2+ and POTS) and POTS subscriber
card. Figure 3- 5 displays cards layout in the ZXDSL 9836 system.
Figure 3- 6 ZXDSL 9836 System Architecture
Figure 3- 6 depicts logical connection among the ZXDSL 9836 cards. There are multiple
mutually connected buses between main control card, co-process card and subscriber
cards. Local bus is in charge of control signals transmission and service bus is in charge
of service data transmission. Service bus includes xDSL service bus, Ethernet service
bus and narrowband service bus.
3.2.2 Cards
Table 3- 1 lists all the ZXDSL 9836 cards.
ZXDSL 9836 Product Description
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Table 3- 1 Cards Specifications
Type NameSpecification
sFunctions Interfaces
Maincontrolcard
SCMFMain controlcard
Core systemcontrol andswitch card
One localmanagementconsole/environmentdetecting console(RJ45), oneout-of-band networkmanagementinterface/cascadeinterface (RJ45), fourdry contacts (6-pinsocket)
Other interfaces areprovided by uplinksub-cards. Fordetails, see uplinksub-card interfacedescription.
Uplinksub-card
OGSDAGigabitEthernet uplinksub-card A
GigabitEthernetuplink
Two 10/100/1000Mself-adaptationEthernet electricinterfaces (RJ45),with synchronousEthernet
OGSDBGigabitEthernet uplinksub-card B
One 10/100/1000Mself-adaptationEthernet electricinterface (RJ45), one1000M Ethernetoptical interface, withsynchronousEthernet
OGSDCGigabitEthernet uplinksub-card C
Two 1000M Ethernetoptical interfaces,with synchronousEthernet
ZXDSL 9836 Product Description
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Type NameSpecification
sFunctions Interfaces
OGSDDGigabitEthernet uplinksub-card D
Two 1000M Ethernetoptical interfaces,without synchronousEthernet
OGSQCGigabitEthernet uplinksub-card C
Four 1000M Ethernetoptical interfaces,with synchronousEthernet
OGSQDGigabitEthernet uplinksub-card D
Four 1000M Ethernetoptical interfaces,without synchronousEthernet
SGGA/10Single GPONONT uplinksub-card GPON ONT
uplink
One GPON ONToptical interface
SGGA/11Dual GPONONT uplinksub-card
Two GPON ONToptical interfaces
SGGP/4
Single GPONand singleGigabitEthernet ONTuplinksub-card
One GPON ONToptical interfaces and
One 1000M Ethernetelectric interfaces
SGGP/7
Single GPONand singleGigabitEthernet ONTuplinksub-card
One GPON ONToptical interfaces and
One 1000M Ethernetoptical interfaces
SEGB/1Single EPONONT uplinksub-card EPON ONT
uplink
One EPON ONToptical interface
SEGB/4Dual EPONONT uplinksub-card
Two EPON ONToptical interfaces
ZXDSL 9836 Product Description
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Type NameSpecification
sFunctions Interfaces
SEGB/7Dual EPONONT uplinksub-card
Two EPON ONToptical interfaces withtwo MAC
SEGD/1Single EPONONT uplinksub-card
One EPON ONToptical interface
SEGD/4Dual EPONONT uplinksub-card
Two EPON ONToptical interfaces
SEGD/10
Single EPONand SingleGigabitEthernet ONTuplinksub-card
One EPON ONToptical interfaces and
One 1000M Ethernetelectric interfaces
XEQB/1
Single10GEPONONT uplinksub-card 10GEPON
ONT uplink
One 10GEPON ONToptical interface
XEQB/4
Dual10GEPONONT uplinksub-card
Two 10GEPON ONToptical interfaces
Co-Process Card
CTMVNarrowbandco-processingcard
TDM switch,synchronismand VoIPserviceprocess
-
VectoringCo-Process Card
SVCEVectoringco-processingcard
controlenginecalculationprocessing
for vectoring
-
ZXDSL 9836 Product Description
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Type NameSpecification
sFunctions Interfaces
ADSL2/2+subscribercard
ASTGC32-lineADSL2/2+over POTSsubscriberinterface card
ADSL2/2+subscriberaccess withbuild-indistributor
32-line PSTN(1*SCSI68) and 32-lineADSL2/2+ subscriberline socket (1*SCSI68)
ASTGF
32-line PSTN(1*SCSI68) and 32-lineADSL2/2+ subscriberline socket (1*SCSI68)
AITGF
32-lineADSL2/2+over ISDNsubscriberinterface card
32-line ISDN(1*SCSI68) and 32-lineADSL2/2+ subscriberline socket (1*SCSI68)
AMTGF
32-lineADSL2/2+over POTSsubscriberinterface cardwith MELT
ADSL2/2+subscriberaccess
32-line ADSL2/2+subscriber linesocket (1*SCSI 68)
VDSL2subscribercard
VTTDN
16 -line VDSL2over POTSsubscriberinterface card(profile 30a)
VDSL2subscriberaccess withbuild-indistributor
16-line PSTN(1*SCSI68) and 16-lineVDSL2 subscriberline socket (1*SCSI68)
VSTEG
24-line VDSL2over POTSsubscriberinterface card(profile 17a)
24-line PSTN(1*SCSI68) and 24-lineVDSL2 subscriberline socket (1*SCSI68)
VSTGC
32-line VDSL2over POTSsubscriberinterface card(profile 17a)
32-line PSTN(1*SCSI68) and 32-lineVDSL2 subscriberline socket (1*SCSI68)
ZXDSL 9836 Product Description
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Type NameSpecification
sFunctions Interfaces
VITGC
32-line VDSL2over ISDNsubscriberinterface card(profile 17a)
32-line ISDN(1*SCSI68) and 32-lineVDSL2 subscriberline socket (1*SCSI68)
VSTGH
32-line VDSL2over POTSsubscriberinterface card(profile 17a)
32-line PSTN(1*SCSI68) and 32-lineVDSL2 subscriberline socket (1*SCSI68)
VSTGD
32-line VDSL2over POTSsubscriberinterface cardwithvectoring(profile 17a)
32-line PSTN(1*SCSI68) and 32-lineVDSL2 subscriberline socket (1*SCSI68)
VMTGD
32-line VDSL2over POTSsubscriberinterface cardwith vectoringandMELT(profile17a)
VDSL2subscriberaccess
32-line VDSL2subscriber linesocket (1*SCSI 68)
SHDSLsubscribercard
SSTDF
16-lineSHDSL.bissubscriberinterface card
SHDSLsubscriberaccess
16-line SHDSLsubscriber linesocket (1*SCSI 68)
COMBOsubscribercard
APTGC
32-lineADSL2/2+ and32-line POTSsubscriberinterface card
ADSL2/2+and POTSsubscriberaccess
32-line ADSL2/2+and POTS subscriberline socket (1*SCSI68)
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary23
Type NameSpecification
sFunctions Interfaces
VPTGC
32-line VDSL2and 32-linePOTSsubscriberinterface card
VDSL2 andPOTSsubscriberaccess
32-line VDSL2 andPOTS subscriber linesocket (1*SCSI 68)
Ethernetsubscribercard
ETCD
2 GE and 14FE Ethernetelectricsubscriberinterface card Ethernet
subscriberaccess
2-line 10/100/1000Mand 14-line 10/100Mself-adaptationEthernet electricinterface (RJ45)
ETCF
2 GE and 12FE Ethernetopticalsubscriberinterface card
2-line 1000M and12-line 100MEthernet opticalinterface
POTSsubscribercard
ATLDI 64-line POTSsubscribercard
POTSsubscriberaccess
64-line PSTNinterface (2*SCSI 68)ATLDZ
Powercard
PWDM
DC power card
-48 V DC3-core power supplysocket
PWDME -48 V DC3-core power supplysocket
PWAM
AC power card
220V/100 VAC (batterypowerbackup)
Internationalstandard AC 3-pinplug and 5.08 pitchpower supply socket
PWAME
220V/100 VAC (batterypowerbackup)
Internationalstandard AC 3-pinplug and 3-corepower supply socket
Fan card FCBM Fan cardSpeed-adjustable fans
-
3.2.2.1 Plug-in Box and Backplane
The details of the plug-in box and backplane are as follows:
ZXDSL 9836 Product Description
24ZTE Confidential & Proprietary
Plug-in Box
The ZXDSL 9836 plug-in box is standard plug-in box with dimensions of 132.9 mm x
482.6mm x 240 mm (Height x Width x Depth).
Backplane
The ZXDSL 9836 backplane provides internal interfaces as following lists:
− Main control card interface, co-process card interface and subscriber card
interface
− Power interface: -48 V, -48V GND, 3.3 V GND
− Fan socket: -48 V, -48 V GND, pulse interface.
3.2.2.2 Main Control Card:
Introduction:
Main control card (SCMF) mainly provides following functions:
System configuration, management and control of subscriber cards
Broadband service management:
− Access xDSL subscribers through broadband bus (including ITU-T G.999.1
G.int) provided by backplane.
− Access Ethernet subscribers through broadband bus provided by backplane.
− Data exchange between uplink /cascade interface and subscriber interface is
accomplished on main control card
Provides one or two GE, EPON ONT, GPON ONT, 10GEPON ONT interfaces by
plugging in different types of uplink sub-cards.
Narrowband service management: plugs Co-process card and POTS or COMBO
subscriber card to realize voice access.
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary25
Panel Diagram:
Main control card (SCMF) typical configuration with Ethernet uplink sub-card and xPON
uplink sub-card installation is displayed in Figure 3- 7.
Figure 3- 7 ZXDSL 9836 SCMF Panel
Hardware Architecture:
Figure 3- 8 shows SCMF hardware architecture:
Figure 3- 8 ZXDSL 9836 SCMF Hardware Architecture
FPGACore Processer
Backplane Interface
Power Supply
Control Bus
Broadband Service Bus
Uplink S
ub-card
CPU
Narrowband Service Bus
Co-Process Card
External Interfaces:
Main control card (SCMF) panel provides various uplink service interfaces by inserting
different uplink service sub-cards. Table 3- 2 lists sub-cards and their external interfaces.
ZXDSL 9836 Product Description
26ZTE Confidential & Proprietary
Table 3- 2 Uplink Sub-card Description
UplinkSub-card
NameFunctions External Interfaces
OGSDA
Gigabit Ethernetuplink service
Two 10/100/1000M self-adaptation Ethernetelectric interfaces (RJ45), with synchronousEthernet
OGSDB
One 10/100/1000M self-adaptation Ethernetelectric interface (RJ45), one 1000MEthernet optical interface, with synchronousEthernet
OGSDCTwo 1000M Ethernet optical interfaces, withsynchronous Ethernet
OGSDDTwo 1000M Ethernet optical interfaces,without synchronous Ethernet
OGSQCFour 1000M Ethernet optical interfaces, withsynchronous Ethernet
OGSQDFour 1000M Ethernet optical interfaces,without synchronous Ethernet
SGGA/10
GPON ONT uplinkservice
One GPON ONT optical interface
SGGA/11 Two GPON ONT optical interfaces
SGGP/4One GPON ONT optical interfaces and
One 1000M Ethernet electric interfaces
SGGP/7One GPON ONT optical interfaces and
One 1000M Ethernet optical interfaces
SEGB/1
EPON ONT uplinkservice
One EPON ONT optical interface
SEGB/4 Two EPON ONT optical interfaces
SEGB/7Two EPON ONT optical interfaces with twoMAC
SEGD/1 One EPON ONT optical interface
SEGD/4 Two EPON ONT optical interfaces
SEGD/10One EPON ONT optical interfaces and
One 1000M Ethernet electric interfaces
XEQB/1 10GEPON ONTuplink service
One 10GEPON ONT optical interface
XEQB/4 Two 10GEPON ONT optical interfaces
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary27
Besides uplink interfaces, SCMF provides the following interfaces as well:
CONSOLE (RJ45): One local console interface for maintaining terminal and one
local console interface for environment detecting device
MGT (RJ45): One out-of-band network interface for local network management and
one network interface for network cascade
MON (6-pin socket): One detecting socket for external alarm Boolean input
Key Features:
Main control card (SCMF) can be configured with different uplink sub-cards and provide
different uplink service interfaces. Table 3- 3 lists main control card key index.
Table 3- 3 SCMF Key Features
Item Features
Dimensions 41.4 mm x 100 mm x 215 mm(Height x Width x Depth)
Max subscriberlines and types
192 ADSL2/2+ subscriber lines, or 192 VDSL2 subscriberlines, or 96 SHDSL.bis subscriber lines, or 192 COMBO(ADSL2/2+ and POTS) subscriber lines, or 96 Ethernetsubscriber lines, or 384 POTS subscriber lines
Max powerconsumption
15 W
Hot swapping No
3.2.2.3 Co-Process Card
Overview:
Co-Process card (CTMV) realizes narrowband service and clock process, including TDM
switch and VoIP service process. It is an optional card.
Picture:
Figure 3- 9 displays the ZXDSL 9836 CTMV panel.
ZXDSL 9836 Product Description
28ZTE Confidential & Proprietary
Figure 3- 9 ZXDSL 9836 CTMV Panel
Hardware Architecture:
Figure 3- 10 depicts CTMV hardware architecture. VoIP processor takes charge of
packet transformation between TDM and IP, Phase-Locked Loop module realizes clock
synchronism and maintenance in case of clock input.
Figure 3- 10 ZXDSL 9836 CTMV Hardware Architecture
TDM switch
Backplane interface
Power Supply
Sync
HW
Crystal Oscillator
Phase-Locked Loop
VoIPProcessor
HW
Key Features:
Table 3- 4 lists CTMV key features.
Table 3- 4 CTMV Features
Item Features
Card Name CTMV
Density ---
Dimensions 20.7 mm×100 mm×215mm (Height x Width x Depth)
Max powerconsumption
3.3 w
Hot swapping Yes
3.2.2.4 Vectoring Co-Process Card
Overview:
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary29
The vectoring Co-Process card (SVCE) implements ES packet processing to offset the
crosstalk between lines. It is an optional card.
Picture:
Figure 3- 11 displays the ZXDSL 9836 SVCE panel
Figure 3- 11 ZXDSL 9836 SVCE Panel
Key Features:
Table 3- 5 lists SVCE key features.
Table 3- 5 SVCE Features
Item Features
Card Name SVCE
Density ---
Capacity 192 line vectoring
Dimensions 20.7 mm×100 mm×215mm (Height x Width x Depth)
3.2.2.5 ADSL2/2+ Card
Overview:
ADSL2/2+ card realize ADSL2/2+ service access and service separation of broadband
access and voice message.
The ZXDSL 9836 ADSL2/2+ subscriber cards provide various types of splitter in
compliance with ITU-T G.992, YDT (Chinese Telecommunications standards), ETSI
(European Telecommunications Standards Institute), etc, and support ADSL2/2+ over
POTS and ADSL2/2+ over ISDN.
Table 3- 6 lists the ZXDSL 9836 ADSL2/2+ cards.
ZXDSL 9836 Product Description
30ZTE Confidential & Proprietary
Table 3- 6 ADSL2/2+ Cards
Name Card Density Functions External Interface
ASTGC
32 lines
ADSL2/2+ overPOTS subscriberaccess with abuilt-in splitter
32-line PSTN (1*SCSI 68)and 32-line ADSL2/2+subscriber line socket(1*SCSI 68)
ASTGF
32-line PSTN (1*SCSI 68)and 32-line ADSL2/2+subscriber line socket(1*SCSI 68)
AITGFADSL2/2+ overISDN subscriberinterface card
32-line ISDN (1*SCSI 68) and32-line ADSL2/2+ subscriberline socket (1*SCSI 68)
AMTGF
ADSL2/2+ overPOTS subscriberinterface card withMELT
32-line ADSL2/2+ subscriberline socket (1*SCSI 68)
Picture:
Figure 3- 12 displays the ZXDSL 9836 ADSL2/2+ panel. Take ASTGC card as an
example.
Figure 3- 12 ZXDSL 9836 ADSL2/2+ Panel
Hardware Architecture:
Figure 3- 13 displays ADSL2/2+ card hardware architecture. ADSL2/2+ over POTS and
ADSL2/2+ over ISDN are the same in terms of card architecture. They are different due
to the splitter they adopt. One splitter is over POTS and the other one is over ISDN.
ASTGF, AITGF and AMTGF are compliant with the latest ITU-T G.999.1 G.int.
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary31
Figure 3- 13 ZXDSL 9836 ADSL2/2+ Card Hardware Architecture
Key Features:
Table 3- 7 lists ADSL2/2+ card key features.
Table 3- 7 ADSL2/2+ Card Features
Item Features
Card Name ASTGF/AITGF/AMTGF ASTGC
Density 32
Dimensions 20.5mm×274mm×231.2mm (Height x Width x Depth)
Typical powerconsumption
23.08W 19.80W
Hot swapping Yes
Note: Typical power consumption is tested under following conditions:
50% subscribers are activated (L0 mode).
Test cable crosssection is 0.5 mm.
The test takes place in the distance of 3000 m from equipment.
3.2.2.6 VDSL2 Card
Overview:
VDSL2 card realizes VDSL2 service access and service separation of broadband access
and voice message. With the standard VDSL2 profiles, VDSL2 card is able to provide
100 Mbps transmission rate in maximum in bi-direction. The ZXDSL 9836 VDSL2 card
supports types of VDSL2 profiles configuration.
ZXDSL 9836 Product Description
32ZTE Confidential & Proprietary
The ZXDSL 9836 VDSL2 subscriber cards provide various types of splitter in compliance
with ITU-T G.992, YDT (Chinese Telecommunications standards), ETSI (European
Telecommunications Standards Institute), etc, and support VDSL2 over POTS and
VDSL2 over ISDN.
Table 3- 8 lists the ZXDSL 9836 VDSL2 cards.
Table 3- 8 VDSL2 Cards
Name Density Functions External Interfaces
VTTDN 16
VDSL2 over POTSsubscriber interfacecard (profile 30a)with a built-insplitter
16-line PSTN(1*SCSI 68) and16-line VDSL2 subscriber socket(1*SCSI 68)
VSTEG 24 VDSL2 over POTSsubscriber interfacecard (profile 17a)with a built-insplitter
24-line PSTN(1*SCSI 68) and24-line VDSL2 subscriber socket(1*SCSI 68)
VSTGC
32
32-line PSTN(1*SCSI 68) and32-line VDSL2 subscriber socket(1*SCSI 68)
VITGCVDSL2 over ISDNsubscriber interfacecard (profile 17a)
32-line ISDN(1*SCSI 68) and32-line VDSL2 subscriber socket(1*SCSI 68)
VSTGH
VDSL2 over POTSsubscriber interfacecard (profile 17a)with a built-insplitter
32-line PSTN(1*SCSI 68) and32-line VDSL2 subscriber socket(1*SCSI 68)
VSTGD
VDSL2 over POTSsubscriber interfacecard withvectoring(profile17a)
32-line PSTN(1*SCSI 68) and32-line VDSL2 subscriber socket(1*SCSI 68)
VMTGD
VDSL2 over POTSsubscriber interfacecard with vectoringand MELT(profile
32-line VDSL2 subscriber socket(1*SCSI 68)
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary33
Name Density Functions External Interfaces
17a)
Picture:
Figure 3- 14 displays the ZXDSL 9836 VDSL2 panel. Take VSTEG card as an example.
Figure 3- 14 ZXDSL 9836 VDSL2 Card Panel
Hardware Architecture:
Figure 3- 15 displays VDSL2 card hardware architecture. VDSL2 over POTS and VDSL2
over ISDN are the same in terms of card architecture. They are different due to the
splitter they adopt. One splitter is over POTS and the other one is over ISDN.
VSTGC, VITGC, VSTGH, VSTGD and VMTGD are compliant with the latest ITU-T
G.999.1 G.int.
The VSTGD or VMTGD card works with the Vectoring Co-Process card to provide
system-level vectoring function.
Figure 3- 15 ZXDSL 9836 VDSL2 Card Hardware Architecture
Key Features:
Table 3- 9 lists VDSL2 card key features.
ZXDSL 9836 Product Description
34ZTE Confidential & Proprietary
Table 3- 9 VDSL2 Card Features
Item Features
Name VSTGD/VMTGD VSTGH VSTGC/VITGC VSTEG VTTDN
Density 32 24 16
Dimensions 20.5mm×274mm×231.2mm (Height x Width x Depth)
Typicalpowerconsumption
40.63W 26.85W 29.95 W 30.40W 22.8 W
Hotswapping
Yes
Note: Typical power consumption is tested under following conditions:
50% subscribers are activated (L0 mode).
Test cable crosssection is 0.5 mm.
For VTTDN card, it is configured with profile 30a and tested in the distance of 300
m.
For VSTEG, VSTGC, VSTGH, VITGC, VSTGD and VMTGD card, it is configured
with profile 17a and tested in the distance of 750 m.
3.2.2.7 SHDSL Card
Overview:
SHDSL card realizes SHDSL service access. The ZXDSL 9836 provides 16-line
SHDSL.bis broadband access or TDM service access, including 4 lines E1 or 16 lines
n*64k narrowband services.
Table 3- 10 lists the ZXDSL 9836 SHDSL cards.
Table 3- 10 SHDSL Cards
Name Density Functions External Interface
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary35
Name Density Functions External Interface
SSTDF 16
SHDSL.bis broadbandaccess, ATM/PTM mode.TDM service access (DDN),including E1 or n*64k.
16-line socket (1*SCSI68)
Picture:
Figure 3- 16 displays the ZXDSL 9836 SHDSL card panel..
Figure 3- 16 ZXDSL 9836 SSTDF Card Panel
Hardware Architecture:
Figure 3- 17 displays SHDSL card hardware architecture.
Figure 3- 17 ZXDSL 9836 SHDSL Card Hardware Architecture
Core Switch Module
Backplane Interface
Power Supply
Broadband Service Bus
SHDSL access module
CESoPmodule
System Control Unit
Broadband Service Bus
SHDSL Interface
Management Bus
Key Features:
Table 3- 11 lists SHDSL card features.
Table 3- 11 SHDSL Card Features
Item Features
Name SSTDF
Density 16
ZXDSL 9836 Product Description
36ZTE Confidential & Proprietary
Item Features
Dimensions 20.5 mm×274 mm×231.2 mm (Height x Width x Depth)
Typical powerconsumption
ATM/PTM mode:21.1 W
TDM mode:26.1 W
Hot swapping Yes
Note: Typical power consumption is tested under following conditions:
50% subscribers are activated (L0 mode).
Test cable crosssection is 0.5 mm.
The test takes place in the distance of 3000 m from equipment.
3.2.2.8 COMBO Card
Overview:
COMBO card integrate 32-line ADSL2/2+ or VDSL2 access, 32-line POTS access, and
32-line embedded splitter, providing high-density access services for subscribers.
Via COMBO card deployment, carriers can decrease the construction cost, save the
space of equipment room and MDF, shorten the wire arranging time. Moreover, COMBO
card is easier to be maintained and energy-effective.
Table 3- 12 lists the ZXDSL 9836 COMBO cards.
Table 3- 12 COMBO Card
Name Density Functions External Interface
APTGC
32
32-line ADSL2/2+access, 32-line POTSaccess and 32-lineembedded splitter
32-line socket (1*SCSI 68)
VPTGC
32-line VDSL2access, 32-line POTSaccess and 32-lineembedded splitter
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary37
Picture:
Figure 3- 18 displays the ZXDSL 9836 COMBO (APTGC) panel.
Figure 3- 18 ZXDSL 9836 COMBO Panel
Hardware Architecture:
Figure 3- 19 displays COMBO card hardware architecture. Two parts are integrated in
same board, one is for broadband service access, comprising of Line Driver modules,
AFE modules and DSP modules. Another is for narrowband service access, comprising
of splitter modules, SLIC modules, CODEC modules and VCP modules. APTGC and
VPTGC are compliant with the latest ITU-T G.999.1 G.int.
Figure 3- 19 ZXDSL 9836 COMBO Card Hardware Architecture
Backp
lane
In
terfa
ce
Interfaces
Key Features:
Table 3- 13 lists COMBO card features.
Table 3- 13 COMBO Card Features
Item Features
Name APTGC VPTGC
Density 32
Dimensions 20.5 mm×274 mm×231.2 mm (Height x Widthx Depth)
ZXDSL 9836 Product Description
38ZTE Confidential & Proprietary
Item Features
Typical powerconsumption
Short distance mode 45.50W 57.8W
Long distance mode 50.90W 63.8W
Hot swapping Yes
Note: Typical power consumption is tested under following conditions:
100% ADSL2/2+ subscribers are activated (L0 mode), test cable crosssection is 0.5
mm and in the distance of 3000 m from equipment.
30% narrowband subscribers are off-hook working. Long distance is more than 1
km and short distance is less than 1 km.
For VDSL2 COMBO card, it is configured with profile 17a and tested in the distance
of 750 m
3.2.2.9 POTS Card
Overview:
POTS card provides POTS subscriber interfaces to realize narrowband voice service
access.
POTS card provides two kinds of working modes automatically: long distance mode
(longer than 1 Km), and short distance mode (within 1 Km). And short distance working
mode saves energy.
The ZXDSL 9836 provides POTS access with 64 lines card.
Table 3- 14 lists the ZXDSL 9836 POTS cards.
Table 3- 14 POTS Cards
Name Density Functions External Interfaces
ATLDI64
POTSsubscriberaccess
64-line PSTN interface(2*SCSI 68)ATLDZ
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary39
Picture:
Figure 3- 20 displays the ZXDSL 9836 POTS card panel. Take ATLDI card as an
example.
Figure 3- 20 ZXDSL 9836 POTS Card Panel
Hardware Architecture:
Figure 3- 21 displays POTS card hardware architecture.
Figure 3- 21 ZXDSL 9836 POTS Card Hardware Architecture
Bac
kpl
ane
Int
erf
ace
InterfacesKey Features:
Table 3- 15 lists POTS card features.
Table 3- 15 POTS Card Features
Item Features
Name ATLDI ATLDZ
Density 64
Dimensions 20.5 mm×274 mm×231.2 mm (Height x Width xDepth)
Typicalpowerconsumption
Shortdistancemode
21.60W 23.20W
Longdistancemode
32.60W 33.60W
ZXDSL 9836 Product Description
40ZTE Confidential & Proprietary
Item Features
Hot swapping Yes
Note: Typical power consumption is tested under condition that 25% subscribers are
off-hook working.
3.2.2.10 Ethernet Card
Overview:
Ethernet card provides Ethernet subscriber interfaces to realize Ethernet broadband
service access. ETCD is able to support 2 lines GE (electric) and 14 lines FE (electric),
ETCF is able to support 2 lines GE (optical) and 12 lines FE (optical).
Picture:
Figure 3- 22 and Figure 3- 23 display the ZXDSL 9836 ETCD and ETCF panel.
Figure 3- 22 ZXDSL 9836 ETCD Panel
Figure 3- 23 ZXDSL 9836 ETCF Panel
Hardware Architecture:
Figure 3- 24 displays Ethernet card hardware architecture.
Figure 3- 24 ZXDSL 9836 Ethernet Card Hardware Architecture
Bac
kpl
ane
Int
erf
ace
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary41
Key Features:
Table 3- 16 lists Ethernet card features.
Table 3- 16 Ethernet Card Features
Item Features
Name ETCD ETCF
Density 2 GE (electric)+ 14 FE(electric)
2 GE (optical)+ 12 FE(optical)
Dimensions 20.5 mm × 274 mm × 231.2 mm (Height x Width x Depth)
Max powerconsumption
8.76 W 9.76 W
Hot swapping Yes
3.2.2.11 Power Card
Overview:
The ZXDSL 9836 supports DC or AC power supply.
The DC power card (PWDM/PWDME) adopts -48 V DC power supply with working
voltage ranging from -40 V to -57 V.
The AC power card (PWAM/PWAME) adopts 110 V / 220 V AC power supply with
working voltage ranging from 88V to 290V, and high voltage DC power input ranging
from 130 to 380V DC. The power card is able to provide battery backup power supply
interface for Li/Fe or lead-acid battery connection.
The ZXDSL 9836 supports the following typical power configuration scenario:
1. Single DC power supply.
2. Single AC power supply.
3. AC and battery supply (built-in battery charging and discharging management
function).
ZXDSL 9836 Product Description
42ZTE Confidential & Proprietary
The DC power card (PWDM/PWDME) is for scenario 1, AC power card (PWAM/PWAME)
is for scenario 2--3.
Picture:
Figure 3- 25 and Figure 3- 26 display the ZXDSL 9836 AC power card (PWAM/PWAME)
and DC power card (PWDM/PWDME).
Figure 3- 25 ZXDSL 9836 AC Power Card Panel
Figure 3- 26 ZXDSL 9836 DC Power Card Panel
Key Features:
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary43
Table 3- 17 lists power card features.
Table 3- 17 Power Card Features
Item Features
Name PWDM PWDME PWAM PWAME
Size 62.1 mm × 100 mm × 215 mm (Height x Width x Depth)
Typical powerconsumption
11.46W 21.46W
Lightning &surge protection
±1Kv/±2Kv ±2Kv/±4Kv/±3kA ±6kV/±5kA ±6kV/±5kA
3.2.2.12 Fan Unit
Overview:
The ZXDSL 9836 Fan Unit is installed in the left side of plug-in box and works in the
draught-to-external mode. It contains two built-in adjustable speed fan modules with the
maximal speed of 4500 rpm. Fan speed can be controlled by the main control card.
In real time, the main control card detects ambient temperature and records system
temperature curve by built-in sensors. According to the pre-configured policy, fan
modules are informed to run under certain speed, to maintain the system running in
normal temperature, and to keep the appropriate balance between noise and heat
dissipation.
The fan unit is able to provide one -48 V DC power supply outlet, which is able to supply
power to peripheral devices such as environment detecting device. The rated current of
peripheral device is supposed to be less than 0.5A.
Picture:
Figure 3- 27 displays the ZXDSL 9836 Fan Unit.
ZXDSL 9836 Product Description
44ZTE Confidential & Proprietary
Figure 3- 27 ZXDSL 9836 Fan Unit Panel
Hardware Architecture:
Figure 3- 28 displays relationship between the fan unit and the main control card.
Figure 3- 28 ZXDSL 9836 fan unit and main control card relationship
Back
plane
In
terf
ace
Key Features:
Table 3- 18 lists Fan Unit features.
Table 3- 18 Fan Unit Features
Item Features
Name FCBM
Dimensions 126.9 mm × 48.1 mm × 225 mm (Height x Width x Depth)
Speed Two adjustable speed fans with the maximum speed of4500 rpm
Typical powerconsumption
4.6 W (room temperature, 35% full speed)
Hot Swapping Yes
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary45
3.3 Cabinet
Table 3-19 Cabinet Specification
Num of
ONUs
installed
TypeDimensions(Height x
Width x Depth)
MDF capacity
(inner/outer)
Install
method
1 OUT50ET 1035×770×460 16/10 Loop, 384/ 400 pole/wall/floor
2 EC50EC-S 1500 ×850 ×500 16/10 Loop, 896/ 960floor/elevated
platform
3.3.1 OUT50ET
Item Feature
Type Equipped with Heat exchanger and
sealed
Space for main equipments 4U+2U
Rectifier (Maximum
Output:A)
40
ZXDSL 9836 Product Description
46ZTE Confidential & Proprietary
Battery capacity (AH) 24 / 38
3.3.2 EC50EC-S
Item Feature
Type Equipped with Heat exchanger and
sealed
Space for main equipments 10U
Rectifier (Maximum
Output:A)
40
Battery capacity (AH) 50 / 100
3.4 Software Architecture
Figure 3- 29 displays the ZXDSL 9836 software architecture.
Figure 3- 29 ZXDSL 9836 Software Architecture
ZXDSL 9836 Product Description
ZTE Confidential & Proprietary47
The ZXDSL 9836 software architecture is composed of an NM sub-system, a broadband
sub-system, an narrowband sub-system, a bearer sub-system and an operation support
sub-system.
3.4.1 NM Sub-system
The NM sub-system supports broadband and narrowband commands and NM
operations. It distributes commands to the broadband sub-system and the narrowband
sub-system for operation and management. It also provides management on both
broadband and narrowband alarms.
3.4.2 Broadband Sub-system
The broadband sub-system is composed of a protocol sub-system and a service
sub-system.
The protocol sub-system implements TCP/IP protocol management.
The service sub-system implements system management, service management
and operation.
3.4.3 Narrowband Sub-system
The narrowband sub-system implements narrowband service, narrowband bearer and
narrowband protocol management.
3.4.4 Bearer Sub-system
The bearer sub-system implements broadband service and narrowband traffic
distribution and control.
3.4.5 Operation Support Sub-system
It works as system shielding module and provides support for broadband and
narrowband protocol and service.
ZXDSL 9836 Product Description
48ZTE Confidential & Proprietary
4 Functions
4.1 DSL Specification
4.1.1 ADSL2/2+
The ZXDSL 9836 supports ADSL2/2+ and complies with ITU-T992.x.
It supports Annex A, Annex B, Annex I, Annex J, and Annex L, Fast and Interleave delay,
and link activation and connection according to line conditions and adaptive mode of the
user terminal devices.
It supports the following ADSL2 features:
bit Constellation
It uses 1-bit encoding. When the channel quality is bad and the channel is allocated with
only one bit, the channel can still bear data, which is very important in long-distance
transmission.
Pilot Channel Floating
In early xDSL specifications, the pilot subchannel and the subchannel for initialization are
the fixed frequency bands. In actual application, conditions of other subcarrier channels
might be good but the pilot channel might be influenced by interferences such as Bridge
Tap or Radio Frequency Interference (RFI), so the xDSL link cannot be activated. It is
supplemented in the ADSL2 specification that the locations of the pilot and the
initialization channel can be changed in initialization phase so that anti-interference
capability of ADSL2 is improved.
Bit Swapping (BS)
Bit swapping increases adaptive capability of ADSL2 in dynamic environment and
improves the line stability. When discovering a subchannel is interfered by noise, the
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transceiver transmits the bearing bit on the subchannel to other subchannel with good
signal quality.
Seamless Rate Adaptation (SRA)
With the environment changes, interference from environmental noises on a certain link
varies in different time period, for example, the electromagnetic interference caused by
power cables is different in the daytime and at night. Besides, the user cables in one
bundle interfere with each other and the interference changes a lot when other user
cables are activating or deactivating. The SRA technology can solve this problem. When
ADSL2 detects the channel environment changes, it will provide rate adaptation for the
new environment and guarantee no link disconnection when the Bit Error Rate (BER) is
less than 10-7.
L2 and L3 Low Power Management Mode
The L2 state is a low-power mode that allows fast entering or exiting the low-power mode
according to the ADSL2 link traffic sent by the ADSL Transceiver Unit at the Central
Office End (ATU-C) to reduce the transmission power. In this mode, the subscriber is
unaware of the power change. The L3 idle state enables the ATU-C and ADSL
Transceiver Unit at the Remote Terminal End (ATU-R) enter into sleep or standby status
to reduce the power consumption.
Single-Ended Loop Testing (SELT)
SELT obtains the line parameters and features through the testing methods on the
Central Office (CO) side when there is no CPE (Customer Premises Equipment) on the
user side. SELT tests parameters including Loop Length, Loop Termination,
Downstream/Upstream Shannon Capacity, Inband Noise (0-1.1 MHz), Termination
Response, and Downstream/Upstream Rate vs Margin.
Dual-Ended Line Testing (DELT)
DELT enhances ADSL2 service and diagnosis functions. When the line quality is too bad
to enter into showtime state, DELT can troubleshoot the line problem. The information
obtained by DELT helps fault locating and damage confirmation.
DELT can test the following parameters:
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− Channel Characteristics Function H(f) per subcarrier
− Quiet Line Noise (QLN) per subcarrier
− Signal to Noise Ratio (SNR) per subcarrier
− Line Attenuation (LATN)
− Signal Attenuation (SATN)
− Signal-to-Noise Margin (SANRM)
− Attainable Net Data Rate (ATTNDR)
− Far-End Actual Aggregate Transmit Power (ACTATP)
Pair bonding
It supports pair bonding defined in ITU-T 998.1. With the multi-pair bonding technology, it
can provide higher downstream rate and high bandwidth service for the subscriber and
improve service quality for the remote subscribers.
4.1.2 VDSL2
The ZXDSL 9836 supports VDSL2 access and comply with ITU-T 993.2.
It supports Annex A, Annex B 997, Annex B 998, and the eight profiles defined in ITU-T
993.2. It selects the optimal profile to transmit the data according to the rate requirement.
It supports Vector of Profiles (VoP) defined in Broadband Forum TR-165. It optimizes the
configuration division method, segmenting it into nine profiles including service related
profiles, spectrum related profiles, quality management related profiles. This division
method effectively reduces the device requirements for total number of profiles and
enables flexible DSL configuration management.
It supports the following VDSL2 features (the features the same as that of ADSL2 are not
repeated):
Downstream Power Back-Off (DPBO)
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When the VDSL2 and ADSL devices are in hybrid deployment, the VDSL2 devices are
usually used for short-distance networking such as FTTB/FTTC, while ADSL devices are
placed at the CO end far from the subscriber. VDSL2 devices and ADSL devices share
the copper cable resource in one area. Under this condition, ADSL signal is attenuated
when it reaches to VDSL2 device, the downstream signal of VDSL2 device on the user
side will cause large Far-End Crosstalk (FEXT). DPBO technology can adjust the
overlapped transmission power spectrum between the VDSL2 and ADSL devices to
reduce the FEXT of ADSL devices.
Upstream Power Back-Off (UPBO)
In VDSL2 device deployment, the distance from each subscriber to the CO device is
different. With less attenuation, the upstream signal near the CO is strong and causes
large FEXT on adjacent lines. With more attenuation, the upstream signal far from the
CO is weak and is more likely to be interfered by FEXT of other lines. UPBO is a
technology to protect the remote subscriber from being interfered by the adjacent
subscriber. By reducing the power of the upstream signal which is strong and near to the
CO, the UPBO technology balances all upstream power spectrums when they reach the
CO and avoid severe interference of the strong lines on the weak lines. The ZXDSL 9836
supports “reference PSD UPBO” and “equalized FEXT UPBO”.
Management Information Base-Power Spectral Density Shaping (MIB-PSD
Shaping)
In VDSL2 technology, the template PSD can be defined within the peak range. The
model of the template PSD is defined through defining series of reference points. Each
reference point contains a spectrum index and one PSD peak value, and can be applied
to the port in profile format.
Radio Frequency Interference (RFI) Notching
The VDSL2 band covers medium and short wave broadcasting and amateur radio
frequency, so it is influenced by RFI of these wireless signals. On the interfered
frequency point, length of the interleaved code or redundancy length of the RS
(Reed-Solomon) code will be increased, which will influence the rate and the channel
delay. By notching the overlapped part of the VSDL2 power spectrum and the wireless
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signals and configuring the power spectrum density of the notching no higher than -80
dBm/Hz, these frequency bands will not bear signals to avoid the RFI.
Extended US0 Band
Through extended US0 band, VDSL2 will be able to support long-distance access with
the capability similar to that of ADSL. The US0 band has a lower frequency which can
vary from 4 kHz (without POTS) to 25 kHz (with POTS), and an upper frequency which
can vary from 138 to 276 kHz, depending on whether the upstream requires a higher
rate.
Virtual Noise
Degree of crosstalk varies with number of interference sources. In actual applications,
although there is no interference source in training and a higher rate is achievable, the
crosstalk might be increased when the interference source subscribers are online, which
may affect the BER or even cause re-training when the crosstalk exceeds the margin.
The virtual noise technology obtains a preset template based on statistics of the pervious
crosstalk. The transceiver performs training according to the template to obtain the
parameters such as noise margin and rate which meet the requirements. Namely,
different noise margins are set for different subcarriers and large noise margin is
maintained for the subcarrier with large potential crosstalk interference.
Impulse Noise Protection (INP)
As a key feature to develop video applications on DSL, INP can effectively eliminate the
short noise caused by external interference sources. INP defines the number of
correctable DSL symbols. The channel with bigger INP value has stronger
anti-interleaving capability, but the transmission delay is prolonged and the bandwidth is
affected.
Improved INP (Retransmission)
ITU-T 998.4 defines the improved INP technology as well as retransmission method and
principle. Different from traditional FEC and interleaving technology, the improved INP
technology can correct the DMT symbols affected by the impulse noise through
retransmission mechanism of Physical Media Specific Transmission Convergence
(PMS-TC), and can provide higher bandwidth, lower delay and BER.
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INM
Spectrum span of VDSL2 can reach 30MHz. The impulsive noise detect helps to improve
line stability. By detecting the impulsive noise length (IL) and noise inter-arrival time (IAT),
it evaluates the effect of the impulsive noise on DSL signal transmission and takes
effective protective measures according to the characteristics of the impulsive noise.
Emergent rate reduction (SOS)
Similar to Seamless Rate Adaption (SRA), SOS adapts to the burst noise by decreasing
the rate. By sending an On-line Reconfiguration (OLR) command and synchronization
handover command without interchanging bit allocation table and gain table, SOS avoids
large amount of interacting messages between the receiver and the transmitter to
achieve fast response to the burst noise.
Dynamic Spectrum Management (DSM)
By balancing the dynamic spectrum, DSM aims to improve line rate, distance and
stability, or transmit signals with the lowest power when the performance and stability
requirements such as rate, margin, and BER are met. DSM sends PSD by optimizing
and managing parameters and signals to coordinate signal transmission and receiving in
the entire cable bundle, so that the transmission performance of the lines in the entire
cable bundle is optimized. DSM Level 3 eliminates crosstalk through joint transmission
and receiving on the CO side and by signal compensation to make performance of any
line in the bundle close to non-interference performance. In DSM Level 3 processing, the
signals sent on each line contain component signals of its own and the other pairs, so
DSM is often called vectoring (G.vector) or multiple-input-multiple-output (MIMO).
Bonding
In compliance with ITU-T 998.1 and 998.2, the bonding technology provides the
long-distance subscribers with higher upstream rate and high bandwidth service.
Metallic Ended Line Test (MELT)
With IP-based development of the whole network, for IP telephone terminals on the user
side such as IAD, the copper cable is not connected to the PSTN device, so the
traditional copper cable maintenance method is unable to test the metallic line and a new
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technology must be adopted for daily line maintenance. MELT can obtain the parameters
such as external voltage and current which are the same as that of the traditional
narrowband copper cable test (112) in pure broadband application scenario. Meanwhile,
MELT can supply wetting current to prevent the copper cable from rusting, which is very
important for maintenance of the copper cable with no feeder cable.
ADSL Compatibility
The same as ADSL, VDSL2 adopts discrete multi-tone (DMT) coding technology. In
addition, it inherits ADSL technology in framing, interleaving, and Trellis coding, so
VDSL2 is compatible with ADSL terminals, which paves the road for smooth evolution of
the access technology to VDSL2.
4.1.3 SHDSL
The ZXDSL 9836 supports SHDSL access and complies with ITU-T G.991.2 standards.
It supports the following broadband features:
− Annex F, data rate is up to 5.69 Mbps over 2-wire links;
− TC-PAM16 and TC-PAM32;
− ATM and EFM;
− Pair bonding over existing wire links, up to 22.76 Mbps data rate at 8-wire
links.
It supports the following CES features:
− SHDSL E1 modem access;
− SHDSL N*64K V.35 modem access;
− Non-structured SAToP and structured CESoPSN;
− RFC396 and RFC3985 for PWE3;
− RFC4197 for TDM.
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Notes: In scenario for E1/V.35 service access, the ZXDSL 9836 is able to work in master
mode or slave mode.
4.1.4 Interworking Function (IWF)
As shown in Figure 4- 1, the Access Node is the ZXDSL 9836. The Access Node (AN) is
the first convergence node in the DSL access network, besides terminating the DSL
physical layer signals, it provides the following IWFs:
Terminates ATM layer on the user side
Provides interconnection between Ethernet uplink and the convergence network
Provides IWF of the ATM layer on the user side and IWF of the Ethernet layer on the
network side
Figure 4- 1 Schematic Diagram of ATM-Ethernet IWF
4.1.4.1 PPPoA IWF
When the upstream AN receives PPPoA packets from the user side, the AN shall support
PPPoA IWF, namely, IWF extracts PPP loading from the PPPoA packets, encapsulates
them into PPPoE packets, and send them to the convergence network. The downstream
IWF extracts PPP loading from PPPoE packets received from the convergence network,
encapsulates them into PPPoA packet, and send them to the subscriber.
PPPoA IWF enables a PPPoE Client entity for each PPPoA user, the PPPoE Client
performs the PPPoE Discovery process by interconnecting with PPPoE Server through
the uplink port. When the discovery process ends, PPPoA IWF can obtain MAC address
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of PPPoE Server and makes it the destination MAC address for PPPoE packets
construction. PPPoA IWF allocates each PPPoA user with one MAC address which can
be automatically obtained from MAC-pool. PPPoA IWF makes this address as the source
MAC address of PPPoE packets. PPPoE Clients can also obtain session_id in the
discovery process and use it in PPPoE packets construction.
4.1.4.2 IPoA IWF
When the upstream AN receives IPoA (1483R) packets from the user side, the AN shall
support IPoA IWF, namely, IWF converts the IPoA packets into IPoA (1483R) packets
and transmits them to the convergence network. The downstream IWF converts the IPoE
packets received from the convergence network to IPoA packets and transmits them to
the subscriber.
To implement IPoA and IPoE packets conversion, the AN shall provide one subscriber’s
MAC address (automatically obtained from MAC-pool) for each ATM pvc bearing the
IPoA packets, so that the data can be transmitted to the correct ATM link according to the
MAC address. Meanwhile, the AN shall obtain the subscriber IP address to respond to
ARP solicitation of the uplink device and get MAC address of the gateway.
4.1.5 Vectoring (G.VECTOR / DSM L3)
The ZXDSL 9836 supports vectoring which is compliant with ITU-T G.993.5 standards.
Principle:
Vectored DSL technology (Dynamic Spectrum Management Level 3) is able to mitigate
the crosstalk effects that form the most serious performance bottleneck for dense
deployments of DSL lines.
Self crosstalk that generated from almost every pair in the bundle connected to a
node, produces most significant impact to VDSL performance, especially in shorter
loops.
− Near-end crosstalk (NEXT) is not problem since VDSL2 uses different
frequency band for upstream and downstream.
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− Far-end crosstalk (FEXT) greatly reduces VDSL2 performance. The basic
principle of vectoring is the reduction or even elimination of crosstalk (self
FEXT).
Vectored system learns and analyzes crosstalk from every pair in the bundle.
Downstream: pre-compensate for FEXT so that signal arrives at CPE receiver
FEXT-free.
Upstream: cancels FEXT in receiver, operating at very-high-speed.
The vectoring-enabled port inspects crosstalk levels and calculates the crosstalk
coefficient matrix by the co-process card during the link establishment process.
Downstream signals are pre-processed according to the crosstalk coefficient matrix
before they are sent. Upstream signals are adjusted according to the crosstalk
coefficient matrix.
The calculation and processing processes of the ZXDSL 9836 are carried out on the
CO end. To enable the modem support the vectoring function, you only need to
upgrade the firmware of the modem.
Product features:
Vectoring is exactly the approach for dramatic performance enhancement. All the lines
connected to the ZXDSL 9836 are coordinated. With vectoring it is irrelevant on which
port of the ZXDSL 9836 an individual line is connected and no rewiring is required.
Vectoring across the entire node, independent of binder, cable or chassis.
Scalable from a few lines to hundreds of lines per node, dynamically identify/cancel
primary disturbers.
Delivering 100 Mbps+ to the subscribers, providing fiber-level performance for
FTTC/FTTB scenarios.
Carrier-class performance, improved power-performance and deployment
predictability.
Benefit:
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Via vectoring, Carriers can get such deployment advantages:
Deployable in larger cabinet locations, Scalable to high port count ports, maximal
flexibility and upgradability.
Much lower operational complexity (no rewiring), much lower CAPEX than a pure
fiber deployment, much lower OPEX for service providers.
Stable performance and high speed, ideal for enabling advanced services.
4.2 GPON
4.2.1 Standards Followed
The ZXDSL 9836 is in compliance with ITU-T G.984 series standards:
ITU-T G.984.1/ G.984.2/ G.984.3/ G.984.4
The longest distance between OLT and ONU is no less than 20 km.
Authentication and discovery mechanism:
The authentication mechanism takes serial number with optional password as the
authentication ID. The discovery mechanism realization goes in compliance with ITU-T
G.984.3.
Encryption mechanism:
It adopts AES-128 encryption algorithm regulated in ITU-T G.984.3. Encryption key
update and synchronization go in compliance with G.984 standard.
FEC Function:
Its up/downstream transmission supports FEC function and goes in compliance with
ITU-T G.984.3.
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4.2.2 Bandwidth Allocation
Static bandwidth allocation:
It supports static bandwidth allocation in compliance with ITU-T G.983.1.
DBA (Dynamic Bandwidth Allocation):
It supports DBA.
DBA supports fair bandwidth scheduling policy for the same CoS when traffic is jammed.
4.2.3 GEM Adaptation
It supports GEM mode.
It supports GEM frame mapping to GTC payload.
It supports Ethernet frame mapping to GEM frame and Ethernet mapping to GEM port
based on VLAN, VLAN/CoS.
4.2.4 T-CONT
It supports taking T-CONT as basic upstream service unit.
It supports mapping from GEM port to T-CONT Queue based on GEM port.
It supports T-CONT Queue scheduling methods: WRR, SP or WRR/SP.
4.2.5 Operation and Maintenance
It supports OAM management channel defined by ITU-T G.984.4.
It supports PLOAM management channel defined by ITU-T G.984.4.
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4.2.6 Optical Linkage Measurement and Diagnosis
The ZXDSL 9836 supports digital diagnostic interface based on SFF-8472 optical
module. It is able to detect the optical module operating temperature, supply voltage,
bias current, transmitted power and received power.
It supports permanent light inspection and automatic shut down.
4.2.7 Fiber Protection Alternation
The ZXDSL 9836 PON interface contains a built-in front optical switch which is able to
check line condition and decide which line is active and the altering time.
Figure 4- 2 ZXDSL 9836 Fiber Protection (GPON)
Alternation Reasons:
Input optical signal loss
Input path channel deteriorating
4.3 EPON
4.3.1 Standards Followed
The ZXDSL 9836 is in compliance with IEEE 802.3 series standards:
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It provides symmetric up/downstream 1.25G transmission rate and this goes in
compliance with IEEE802.3 ah standard.
It supports wavelength division multiplexing technology and one-fiber bidirectional
transmission. Its downstream central wavelength is 1490 nm and upstream central
wavelength 1310 nm.
It supports Ethernet service transmission in format of 802.3 Ethernet frame and this goes
in compliance with IEEE802.3ah standard.
It adopts 1000BASE-PX20 or 1000BASE-PX20+ physical interface, PMD layer is
compliant with chapter 60, IEEE 802.3-2005.
Multi-Point Control Protocol (MPCP):
Multi-Point control Protocol (MPCP) defines MAC control mechanism in P2MP network, it
is complied with chapter 64, IEEE 802.3-2005.
Encryption mechanism:
It supports triple churning mechanism of China Telecom spec (CTC). After MPCP
Discovery and OAM Discovery, system starts interact churing key, then encrypts all
downstream traffic, including data packets, MAC control frames and OAM frames.
4.3.2 System Registration and Authentication
The ZXDSL 9836 supports ONU plug-and-play and automatic registration.
ONU Identifying and Authentication:
The ZXDSL 9836 supports both ONU identifying and authentication methods:
ONU Identified and authenticated by MAC address
ONU identified and authenticated by logical ID (Logical ID is a string of characters
prolonged and can be configured independently.
Dead Mechanism:
The ZXDSL 9836 supports dead mechanism when ONU registration is denied by OLT.
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4.3.3 Logical Link Identification (LLID)
The ZXDSL 9836 supports single LLID.
Independent MAC address
Standard MPCP discovery and registration, standard Gate message and Report
message processing.
Independent DBA configuration, independent key generating and exchanging
protocol, independent configuration and management via OAM link.
4.3.4 Operation Administration and Maintenance (OAM)
The ZXDSL 9836 supports OAM as regulated in Clause57, IEEE802.3-2005, Managed
Object Class, Attribute and Action Organization as regulated in Clause30.
It adopts Organization Specific Extension mechanism to realize extended ONU remote
OAM function as regulated by IEEE802.3-2005.
It is compliant with China Telecom spec (CTC) interoperability.
4.3.5 Dynamic Bandwidth allocation (DBA)
The ONU supports describing all queues status and reporting local queue status to the
OLT. This enables the OLT to allocate dynamically uplink bandwidth to the ONU.
ONU up/downstream service can be mapped to queues with different priority for
dispatching operation by IEEE802.1D User Priority.
4.3.6 Fiber Protection Alternation
The ZXDSL 9836 supports full-protection type-C scheme of China Telecom. Its PON
interface contains a built-in front optical switch which is able to check line condition and
decide which line is active and the altering time.
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Figure 4- 3 ZXDSL 9836 Fiber Protection (EPON)
Alternation Reasons:
Input optical signal loss
Input path channel deteriorating
4.3.7 Optical Linkage Measurement and Diagnosis
The ZXDSL 9836 provides SFF-8472 optical module digital diagnostic interface to detect:
operation temperature, supply voltage, bias current, transmitted power and received
power.
The ZXDSL 9836 supports permanent light inspection and automatic shut down.
4.4 10GEPON
4.4.1 Standards Followed
In compliance with IEEE 802.3 series standards:
The ZXDSL 9836 is an IEEE 802.3av-compliant 10GEPON ONU, and supports both
10/1G asymmetric and 10/10G symmetric mode.
Because of backward compliance with 1G EPON, ODN can be reused and shared
among 1G EPON and 10GEPON devices. The ZXDSL 9836 supports wavelength
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division multiplexing technology and one-fiber bidirectional transmission. Its downstream
central wavelength is 1577 nm and upstream central wavelength 1310 nm (10/1G
asymmetric) or 1270 nm (10/10G symmetric).
It adopts 64B/66B codec which is same as IEEE 802.3ae 10G Ethernet, codec efficiency
gets big promotion in comparison with 8B/10B of 1G EPON.
It supports increasing distance and split ratios for PON deployments, in both 10/10G
symmetric and 10/1G asymmetric modes.
Multi-Point Control Protocol (MPCP):
MPCP gets some adaptive improvement based on 1G EPON.
Different rate ONUs can be coexisted over same ODN.
Encryption mechanism:
It supports triple churning mechanism of China Telecom spec (CTC). After MPCP
Discovery and OAM Discovery, system starts interact churing key, then encrypts all
downstream traffic, including data packets, MAC control frames and OAM frames.
Forward Error Correction (FEC):
It supports mandatory stream-based RS (255, 223) FEC for symmetric 10G data path.
4.4.2 System Registration and Authentication
The ZXDSL 9836 supports ONU plug-and-play and automatic registration.
ONU Identifying and Authentication:
The ZXDSL 9836 supports both ONU identifying and authentication methods:
ONU Identified and authenticated by MAC address
ONU identified and authenticated by logical ID (Logical ID is a string of characters
prolonged and can be configured independently.
Dead Mechanism:
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The ZXDSL 9836 supports dead mechanism when ONU registration is denied by OLT.
4.4.3 Logical Link Identification (LLID)
The ZXDSL 9836 supports single LLID.
Independent MAC address
Standard MPCP discovery and registration, standard Gate message and Report
message processing.
Independent DBA configuration, independent key generating and exchanging
protocol, independent configuration and management via OAM link.
4.4.4 Operation Administration and Maintenance (OAM)
The ZXDSL 9836 supports OAM as regulated in Clause57, IEEE802.3-2005, Managed
Object Class, Attribute and Action Organization as regulated in Clause30.
It adopts Organization Specific Extension mechanism to realize extended ONU remote
OAM function as regulated by IEEE802.3-2005.
It is compliant with China Telecom spec (CTC) interoperability.
4.4.5 Dynamic Bandwidth allocation (DBA)
10GEPON and 1GEPON adopt consistent DBA schedule.
The ONU supports describing all queues status and reporting local queue status to the
OLT. This enables the OLT to allocate dynamically uplink bandwidth to the ONU.
The ONU up/downstream service can be mapped to queues with different priority for
dispatching operation by IEEE802.1D User Priority.
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4.4.6 Fiber Protection Alternation
The ZXDSL 9836 supports full-protection type-C scheme of China Telecom. The ZXDSL
9836 PON interface contains a built-in front optical switch which is able to check line
condition and decide which line is active and the altering time.
Figure 4- 4 ZXDSL 9836 Fiber Protection (10GEPON)
Alternation Reasons:
Input optical signal loss
Input path channel deteriorating
4.4.7 Optical Linkage Measurement and Diagnosis
The ZXDSL 9836 provides SFF-8472 optical module digital diagnostic interface to detect:
operation temperature, supply voltage, bias current, transmitted power and received
power.
The ZXDSL 9836 supports permanent light inspection and automatic shut down.
4.5 L2 Functions
4.5.1 L2 BRIDGE Functions
IVL:
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It supports standard IEEE802.1D L2 Bridge functions.
It supports MAC+S-VID learning and forwarding mechanism.
It supports Ethernet frames which are in compliance with Ethernet V2 standard
format.
It supports packets line-speed forwarding.
It supports JUMBO frames forwarding.
It supports special packets such as IGMP, BPDU packets capture and transparent
transmission
Basic Functions of Ethernet Interface:
Port rate limitation and self-adaptation supports 10 / 100 M restriction and
self-adaptation.
Port mode restriction and self-adaptation supports full-duplex and half-duplex
modes and self-adaptation.
It supports IEEE802.3x traffic control protocol.
MAC address learning and aging:
It supports MAC address automatic learning mechanism.
It supports MAC address automatic aging mechanism.
It supports static MAC address configuration.
It supports reserved MAC address filtering.
It supports MAC address statistics, based on port or VLAN.
STP (Spanning-Tree Protocol):
All Ethernet interfaces support STP defined by IEEE802.1d.
All Ethernet interfaces support RSTP defined by IEEE802.1w.
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All Ethernet interfaces support MSTP defined by IEEE802.1s.
L2 link aggregation:
Ethernet interfaces support L2 link aggregation mode to realize traffic balance and
redundancy backup.
It complies with LACP defined by IEEE 802.3ad.
Subscriber interface L2 isolation:
A subscriber can only exchange with uplink port. Subscribers are isolated from each
other.
Mirroring:
It supports mirroring based on physical interfaces.
It supports mirroring based on traffic.
It supports Ingress and Egress independent mirroring.
Virtual MAC:
Because of untrustable source MAC address, the operators hope the source MAC
addresses are manageable and controllable, virtual MAC address can solve this problem.
For the Ethernet frames received in the upstream direction, the source MAC A
(subscriber address) is replaced with VMAC. For the Ethernet frame received in the
downstream direction, the destination VMAC is replaced with MAC A (subscriber
address). VMAC contains the MAC of the ETH header and the ARP request or DHCP
Bootp. The VMAC function can be managed based on port and VLAN. Both the illegal
all-zero MAC addresses in the upstream direction and the multicast MAC addresses in
the downstream direction will not be processed.
Virtual MAC can be divided into 1:1 and N:1 mode according to allocation mode of MAC
A’ (system address):
In 1:1 mode, each subscriber’s MAC will be replaced into an unique manageable
VMAC that includes the customization contents such as MSANID(This MSANID can
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be used for distinguishing different MAC area and can be used for VMAC of the
ZXDSL 9806H.), slot and port information, and one MAC collision domain (different
values are allocated to different subscriber source MAC address. Each port
supports maximum 64 VMAC processing). Meanwhile, both VMAC and MAC
addresses support ageing with the default ageing time of 300s..
In N:1 mode, all subscribers’ MAC addresses are replaced with the same system
MAC address. In PPPoE application, SessionId is the only identifier of PPPoE
session, so when the PPPoE session obtains a SessionID, it establishes dynamic
relationship between the subscriber’s MAC address and SessionID as the basis for
MAC address replacement. In IPoE application, IP address is the only identifier for
IPoE, so when DHCP obtains an IP address, it establishes dynamic relationship
between the subscriber’s MAC address and the IP address as the basis for MAC
address replacement.
4.5.2 VLAN Functions
VLAN protocol:
It supports IEEE 802.1q VLAN (Q-VLAN ID ranging from 1 to 4094).
It supports IEEE 802.1ad VLAN Stacking (C-VLAN ID and S-VLAN ID ranging from
1 to 4094).
It supports VLAN definition and application regulated in Broadband Forum TR-101.
VLAN ID:
It supports adding S-Tag to untagged or priority tagged frames from subscriber
interfaces on demands.
It supports adding C-Tag and S-Tag to untagged or priority tagged frames from
subscriber interfaces on demands.
It supports transforming Q-Tag to S-Tag for Q-Tagged frames from subscriber
interfaces on demands.
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It supports reserving Q-Tag or transforming Q-Tag to C-Tag and adding S-Tag to
Q-Tagged frames from subscriber interfaces on demands.
It supports removing VLAN ID from downstream frames from NSI before being sent
to subscriber interfaces. Removing VLAN ID means to remove S-Tag or to remove
S-Tag and C-Tag both.
It supports configuring subscriber interfaces in terms of frame types the interfaces
can receive. The interface can be configured to be VLAN tagged, untagged, priority
tagged or admit all. The frames will be discarded if they are not in compliance with
the interface configuration.
It supports Selective QinQ VLAN ID, supports adding or mapping S-Tag based on
subscriber interfaces type or command keywords including C-VID, C-Tag priority,
Ethernet type.
VLAN membership list:
The system configures VLAN membership list to transparent VLAN ports to classify
VLAN tagged frames. VLAN-tagged frames whose IDs are not listed in the VLAN
membership list are to be forwarded as TLS service. Otherwise they are forwarded as
non-TLS service.
The system configures VLAN membership list to none transparent VLAN ports to receive
or discard VLAN tagged frames. VLAN-tagged frames whose IDs are being listed in the
VLAN membership list are to be received and forwarded. Otherwise they are discarded.
VLAN translation list:
The system configures VLAN translation list for specific VLAN members. These listed
VIDs can be translated between Q-VID and S-VID, Q-VID and C-VID or Q-VID and
C-VID / S-VID pair.
1:1 VLAN:
1:1 mapping from subscriber interfaces (physical interface or logical interface) to VLANs.
The mapping is unique at ONU/OLT node or convergence network.
Forwarding mechanism in 1:1 VLAN mode:
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It supports subscriber MAC address learning.
Service stream should be S-Tagged when it is accessing OLT. And C-Tag is
optional.
The S-Tag / C-Tag pair is unique in the system.
N:1 VLAN:
N:1 VLAN mapping is the mapping from subscriber interfaces (physical interfaces or
logical interfaces) to VLANs. The subscriber interfaces can belong to one ONU / OLT
node or different ONU / OLT nodes.
Forwarding mechanism in N:1 VLAN mode:
It supports prohibiting service forwarding among different subscriber interfaces and
realizing L2 isolation.
It supports subscriber MAC address learning.
Service stream should be S-Tagged when it is accessing OLT.
VLAN transparent port:
VLAN transparent port is the subscriber port which is able to bear TLS and non-TLS, and
TLS is a must. VLAN transparent port forwards directly TLS stream without modifying
its initial framehead or payload.
Untagged and priority-tagged service stream beared by VLAN transparent port is
forwarded as TLS service.
Untagged service stream beared by VLAN transparent port can be forwarded as TLS if
its VLAN ID belongs to this port VLAN membership list otherwise it can be forwarded as
non-TLS if its VLAN ID does not belong to this VLAN membership list.
The port configures one TLS S-VID for TLS to encapsulate S-Tag. The TLS S-VID is
unique for each VLAN transparent port.
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For non-TLS stream, corresponding VLAN translation list is configured to VLAN
membership list to implement bidirectional translation between Q-VID and S-VID, Q-VID
and C-VID or Q-VID and C-VID / S-VID pair.
For downstream, the operation is just the opposite of the upstream.
Non VLAN transparent port:
Non VLAN transparent port is the subscriber port which is able to bear non TLS only.
The system adds S-Tag or both C-Tag and S-Tag to untagged and priority-tagged
service stream beared by non VLAN transparent port. It is able to support:
Configuring default S-Tag and C-Tag to the port
Configuring Ethernet type filter which supports PPPoE, IPoE and ARP and
implements VLAN allocation (C-Tag and S-Tag) based on Ethernet protocol
For VLAN tagged service stream which is not beared by non VLAN transparent port, the
operation is:
Discarding those VLAN tagged frames whose VID does not belong to VLAN
membership list.
Configuring VLAN translation list to VLAN membership list to implement
bidirectional translation between Q-VID and S-VID, Q-VID and C-VID or Q-VID and
C-VID / S-VID pair.
For downstream, the operation is just the opposite of the upstream.
4.5.3 Ethernet OAM Functions
According to their functions and application coverage, Ethernet OAM standards can be
classified into:
UNI to UNI Service-layer OAM: used by service suppliers
Connectivity OAM: used by carriers
Linkage-level OAM: used for physical linkage detecting
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Ethernet local management interfaces
These protocols are supplementary to each other and are able to provide end-to-end
service operation, management and maintenance. Their system architecture is displayed
in Figure 4- 5.
Figure 4- 5 Ethernet OAM Architecture
The ZXDSL 9836 supports IEEE 802.1ag and IEEE 802.3ah. It is able to provide real
end-to-end Ethernet service management and all service-layer OAM application.
IEEE 802.1ag:
IEEE 802.1ag can run end-to-end and realize connectivity OAM functions.
The ZXDSL 9836 supports MEP. MEP is applied to uplink interface / cascade interface /
subscriber interface which starts or terminates CFM.
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Figure 4- 6 IEEE 802.1ag Architecture
LBM function: diagnoses and checks bidirectional connectivity between MEP and MIP or
and relatively equal MEP. The function includes bandwidth throughput check, bit error
check. This function is similar to the ping function.
LTM function: identifies neighboring relationship sorting between MEP and MIP or and
relatively equal MEP. When system fault (such as linkage or equipment problem) or
forwarding planar loop takes place, it is possible the sorting relationship of MIP and / or
MEP does not go in accordance with the expectation. The disordered sorting relationship
can result in trouble location information.
IEEE 802.3ah:
IEEE 802.3ah is limited to single linkage (direct P2P connection) detect to realize
linkage-level OAM function. OAM can only be transmitted between two directly
connected devices and cannot be forwarded. IEEE 802.3 ah has been combined into
802.3-2005 as its Chapter 57.
The ZXDSL 9836 supports the following functions:
Remote looping: to provide data linkage-level looping function
There is content repetition in both OAM protocols of IEEE 802.1ag and IEEE802.3ah. But
to provide end-to-end Ethernet service management in a sense, the two protocols must
work together.
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4.6 QoS
4.6.1 Service Stream Classification and Identification
Service stream classification:
It supports upstream service classification based on physical port and source MAC
address, destination MAC address, VLAN ID, VLAN priority (IEEE802.1D), Ethernet type
(such as IP, PPPoE, ARP/RARP), destination IP address, source IP address, IP type
(such as TCP, UDP, ICMP, IGMP), IP DSCP, TCP/UDP port. It also supports packets
in-depth check (check the first 96 bytes).
It supports 802.1D priority and service mapping.
Service stream identification:
It supports identifying upstream service with priorities based on stream classification. It
supports 802.1D subscriber priority identification reuse, addition and modification. It
supports ToS / DSCP priority identification modification.
It supports service priority ID configuration for subscriber interface.
4.6.2 Congestion Management
Queue scheduling:
It supports up / downstream service mapping to queues with different priorities and
scheduling according to 802.1D subscriber priority ID.
It supports implementing upstream service local scheduling according to OLT bandwidth
authorization. And PON port supports eight queues.
Scheduling algorithm supports SP / WRR / SP+WRR.
It supports NSI / USI queue number: 8 / 4.
Buffer management:
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It supports buffer management and its buffer is exclusive for each user port.
Congestion avoidance mechanism:
It supports Tail-Drop algorithm.
4.6.3 Traffic Analysis and Integer
It supports status report DBA. It can realize up service stream speed limit through up
service stream scheduling according to OLT DBA authorization.
User-side Ethernet interface supports up/down service stream port speed limit.
It supports service stream speed limit based on source MAC address, destination MAC
address, VLAN ID, VLAN priority (IEEE802.1D), Ethernet type, destination IP address,
source IP address, IP type and IP DSCP, TCP/UDP port.
4.7 Multicast Functions
4.7.1 IGMP
IGMP Snooping:
IGMP Snooping is configured to snoop on IEEE 802.1 Bridge IGMP messages sent by
multicast router or by main machine which receives multicast for purpose to promote
multicast stream distribution on L2 networks.
IGMP Snooping includes IGMP Transparent Snooping and IGMP Snooping with Proxy
Reporting.
IGMP Transparent Snooping is to implement IGMP Snooping function without creating,
intercepting or modifying IGMP message.
IGMP Snooping contains three function sub-items:
Report restraint: To intercept and manage Report packets sent from IGMP main
machine and forward only when it is necessary
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Leaving restraint: To intercept and manage Leave packets sent from IGMP main
machine and forward only when it is necessary such as when the last member in
multicast group is leaving
Query restraint: To intercept and manage Query packets
The system supports IGMP Version1 / Version2 / Version3.
IGMP Proxy:
IGMP Proxy, which contains one main machine interface and several router interfaces,
learns and forwards multicast data through IGMP. The main machine interface works as
IGMP main machine to start IGMP packets adding and leaving. Router interfaces work to
query user side. Main machine interface and router interfaces belong to different
sub-nets.
It supports IGMP Version1 / Version2 / Version3.
4.7.2 Multicast Control
Multicast VLAN:
MVLAN is the VLAN to bear multicast traffic. In MVLAN, multicast traffic forwarding is
under control of IGMP Snooping if the function is configured and executed. MVLAN can
be specialized or shared, or N:1 mode.
CAC (Channel Access Control):
It supports channel list and subscriber interface privilege list configuration, query and
storage.
It supports multicast CAC based on physical interface and logical VLAN (PVC / VLAN).
Interface CAC list application privilege includes denial, previewing and subscription.
It supports getting CAC multicast control privilege list information in dynamic method
from network management (in SNMP mode) SMS.
Multicast channel preview (PRV):
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Based on CAC, it realizes preview privilege for subscribers who did not make a purchase.
It is used to configure previewing duration, previewing times per 24 hours and previewing
interval.
Multicast channel calling statistics (CDR):
CDR is the detailed multicast subscriber access information records including channels
that subscribers play, subscriber channel privilege, time stamp information, long-term
online and unprivileged subscribers statistics for commercial analysis and planning
purpose.
Channel Package:
It supports channel packages. The package is the combination of channels and every
program in these channels is configured with Permit or Preview privilege. One channel
can be configured to any package or packages with respectively independent privilege.
Package is configured to one specific subscriber interface as a result with specific
multicast access privilege. One subscriber interface can have several packages.
It supports channel packages based on physical interface and logical interface (PVC /
VLAN).
Multicast SMS (Service Management System):
SMS, in combination of NM, is a friendly visual management interface and is used to
configure multicast management information and control privilege information, CAC list
and CDR information.
SMS and NM are independent logically.
Fast Leave:
When a multicast subscriber is leaving the multicast group or switch off device after
program previewing, the device is able to stop copying and forwarding multicast stream
to the multicast subscriber.
Multicast channel prejoin:
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Multicast channel prejoin function enables specified multicast group to send enquiry
packets to network side consistently. The prejoin is able to leading the multicast service
to the device consistently and so to decrease subscriber channel shift delay.
Multiple STBs:
There can be more than one STB in one subscriber interface. To avoid other STBs
play-on-demand breakage when one of them is leaving, the system needs to clarify if
there are other STBs working by recording relationship of STB address (MAC or IP) with
multicast group.
STBs can have different play-on-demand privilege although they are in one subscriber
interface. To avoid unprivileged STB playing certain programs, CAC must match STB IP
address and discard IGMP enquiry from unprivileged STB.
Subscriber interface multicast channel number limit:
This is used to limit subscriber number and access multicast group number thus
increasing multicast management and security.
Subscriber interface multicast service bandwidth check:
When a subscriber is joining in a multicast group, he need check bandwidth occupation.
If the unoccupied bandwidth cannot fulfill requirements of play-on-demand, the enquiry is
denied to ensure previous programs quality.
System level MVLAN multicast service bandwidth check:
When a subscriber is joining in a multicast group which is belong to one MVLAN, the
9836 need check bandwidth occupation based on preset bandwidth for the system level
MVLAN. If the unoccupied bandwidth cannot fulfill requirements of play-on-demand, the
enquiry is denied to ensure previous programs quality.
Multicast services pause:
Multicast service pause and recovery based on subscriber interfaces are applied to
payment delay subscribers or initial subscription application. It is to temporarily stop the
subscriber multicast service but not to cancel the subscriber configuration permanently.
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General Leave All functions:
General Leave All functions solve the following problem:
After STB recovery, the previous programs played-on-demands keep unknown. So the
STB cannot leave fast and need wait for general check overtime. During this period, the
previous programs cannot be delivered. And if the subscriber plays a program at this
moment, it is possible that the play fails due to insufficient bandwidth.
Illegal multicast stream restraint:
It prohibits illegal multicast server establishment which interferes normal service
subscription.
4.8 VoIP
The ZXDSL 9836 supports built-in VoIP management module. It adopts H.248 protocol
or IMS SIP protocol to implement voice encoding/decoding (G.711,G.726,G.723.1,
G.729A/B, etc), fax (T.30, T.38), VoIP, and FoIP services under the control of SS or IMS.
The service includes basic service, supplementary service, Fax and Modem service.
The ZXDSL 9836 supports single IP and multiple IP allocation mechanism. Voice service
can use single IP which is same as NMS or be configured separately, the media stream
IP and signal stream IP can be different in voice service and can be captured dynamically
through DHCP Option60.
4.8.1 Voice processing protocol and encoding
4.8.1.1 H.248 protocol:
H.248/Megaco functions:
The ZXDSL 9836 implements VoIP services including voice and fax services between
PSTN and IP network or in the internal IP network through the control of the media
gateway controller on the media gateway. The ZXDSL 9836 supports the following
H.248/Megaco functions
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IPv4 and smooth migration to IPv6
Media and call control functions
Temporary termination point for generating and transmitting RTP flows
POTS subscriber access
IP QoS analysis
Self-adaptive MGC overload control
Real-time statistics report
4K digital map
The fax and the modem support auto switch of voice to G.711 VBD mode
(complying with ITU-T Recommendation V.152)
Reporting DTMF signals via voice encoding
DTMF generation, detection, and forwarding process
Complies with ITU-T and ETSI standards.
− ITU-T H.248.1 gateway control protocol: V1/V2/V3, including H.248 Sub-series
− ETSI ES 283 002 Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);H.248 Profile for controlling
Access and Residential Gateways.
Complies with IETE standards.
Complies with YD/T 1292-2003.
4.8.1.2 IMS SIP:
The ZXDSL 9836 supports connecting with universal SIP servers or SS:
Supports connecting IMS network defined by 3GPP
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Supports two-party and multiple party conference
Supports complementary services relevant to the switch hook
Supports UDP bearing
Complies with IETF and ETSI standards
Complies with YD/T 1522-2006
Voice signal coding and encoding:
Supports G.711 (A/U)
Supports G.729A/B
Supports G.723.1
4.8.2 Voice management module
Voice management functions:
The system provides functions including G.168 echo restraint, mute check and
compaction, comfort noise generation, adaptive jitter buffer VAD (Voice Activity
Detection), heartbeat, self-switching, hairpin and second time dialing.
Call management and control:
It provides DTMF check and building.
The system is able to receive and implement digital map sent by SS.
It supports identifying subscriber hookon, hookoff, hookflash or dialing events,
inspecting occupied lines and busy number dialing answer. Under the SS control, it
can send all types of signals such as dialing tone, ringing tone and ringing back
tone.
It supports voice signals and Fax / Modem signals recognization and operates
accordingly.
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Resource control:
It supports reporting to SS equipment physical entity status change caused by
trouble, recovery or managing activity occurrence. It is able to report the termination
point is in or free of service operation.
It supports allocating related resources according to SS commands. It also supports
releasing current or prejoin resources according to SS enquiry.
Status control and troubleshooting:
It supports disconnection inspection caused by communication linkage fault, traffic
jam or SS fault. It is able to reconnect linkage after fault recovery or troubleshooting.
It supports reporting abnormal situation in process of event management to SS.
Synchronization and timing:
It supports synchronization and timing, it supports NTP V3.
Registration:
It supports registration and deregistration.
It supports dual homing MGC.
4.8.3 Other services
Besides basic voice service, the system also supports the following services:
Supplementary services under SS control:
It supports the following supplementary services:
Caller number display
Caller number display restrictions
No-answer call forwarding
Unconditionally call forwarding
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Busy call forwarding
Cut-off service
Disturbance-free
Call restriction
Hotline services
A malicious call searching
Busy call-back
Call waiting
The three-party conversation
Voice conference
Distinctive ringing
Polarity reversal
Abnormal calls under SS control:
It supports:
Caller hookoff no-dialing
Caller hookoff dialing and called party hookon
Caller hookoff dialing number missing
Not to hang up after the call
Caller hookoff dialing the number that does not exist
Fax service under SS control:
Supports Fax services with Fax tone inspection functions.
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Supports T.30 and T.38 protocols to provide IP Fax services under SS control.
Modem services under SS control:
Supports Modem tone inspection functions.
Supports Modem service realization in transparent mode to provide Modem service
under SS control.
4.8.4 Line Test (112)
Subscriber line test:
Subscriber line test includes infrared voltage, capacity, insulation resistance, loop
resistance / loop current and group tests.
Circuit line test:
Circuit line test includes dialing tone, ringing tone stream voltage, feeding voltage, and
bidirectional circuit tests.
4.8.5 Voice Quality Guarantee
The ZXDSL 9836 takes the following measures to ensure the voice service quality:
Echo canceling function (complies with G.165/G.168)
Voice activity detection (VAD) function
Comfortable noise generation (CNG) function
Packet loss concealment (PLC) function
Dynamic adjustment of jitter buffer
Tx/Rx gain control
The ZXDSL 9836 takes the following measures to isolate the VoIP flows and broadband
data flows to ensure the voice service quality:
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Configures different VLAN for the VoIP media flows, signaling flows, management
flows, and broadband data flows
Configures different CoS for the VoIP media flows, signaling flows, management
flows, and broadband data flows
Configures different type of service (ToS) for the VoIP media flows, signaling flows,
management flows, and broadband data flows
Configures different differentiated services code point (DSCP) for the VoIP media
flows, signaling flows, management flows, and broadband data flows
4.9 IPv6 Function
As an AN, the ZXDSL 9836 meets the requirement for architecture and function defined
in Broadband Forum TR-177 and supports IPv6/IPv4 dual stacking function.
4.9.1 IPv6 Transparent Transmission
It supports IPv4 by default. It does not need to process IPv6 services but transparently
transmits IPv6 protocol and data. It does not sense the IPv4 and IPv6 attributes. This
characteristic enables the device in the current network support IPv6 service.
4.9.2 IPv6 Stateless Address Auto Configuration (SLAAC) Port Positioning
In SLAAC access mode typical of IPv6, IETF is working on draft-krishnan-6man-rs-mark
to help the BNG differentiate users. It inserts a Line Identification Destination Option (LIO)
in RS sent by the subscriber in the upstream direction and brings the subscriber
positioning information to Broadband Network Gateway (BNG). In the draft, the LIO
process of AN and BNG as well as packet encapsulation format are defined.
4.9.3 IPv6 DHCPv6 Port Positioning
In N:1 VLAN application scenario, to facilitate the BNG differentiate the subscriber,
DHCPv6 L2 relay agent is adopted in DHCPv6 interaction between the subscriber and
the BNG. The access device inserts an interface-id or remote-id in the upstream
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DHCPv6 packets and sends it to the BNG. Format of interface-id and remote-id is
defined by the operators according to their requirements. The downstream DHCPv6
packets are forwarded to the subscriber after the interface-id and remote-id are deprived
in the access device.
4.9.4 IPv6 Source Guard
IP spoofing exist in IPv6oE access scenarios in which other IP address or services are
stolen or the network is forcibly accessed without obtaining configuration information
through DHCP. All of these deeds disturb uniform management of the operator, affect
services of legal users, and threaten the system security. By adopting the IPv6 Source
Guard technology, the ZXDSL 9836 can effectively prevent IP spoofing or malicious DoS
attack to improve the device security.
4.9.4.1 DHCPv6/ND Snooping
The IPv6 Snooping technology effectively prevents IP snooping of malicious users. IPv6
has two types of snooping method: single IPv6 address and IPv6 address suffix.
In DHCPv6 mode, the mapping relationship between the user port and the IP address is
established through DHCPv6 Snooping. In SLAAC mode, the subscriber sends RS to the
BNG after the link local address is automatically generated, the BNG returns Prefix
Information Option (PIO) to specify the IPv6 prefix allocated to the subscriber, the
subscriber generates a global unicast address according to the prefix and the link local
address. Through snooping DAD information, the AN can set up the mapping
relationship between the subscriber and the IP address to achieve ND Snooping in
SLAAC mode.
Through DHCPv6/ND snooping, the system establishes and maintains the DHCPv6/ND
Snooping binding table that includes subscriber’s MAC address, IPv6 address/IPv6
address prefix, lease time, VLAN-ID interface, etc. The DHCPv6/ND snooping
invalidates the items in the DHCPv6/ND snooping binding table according to the auto
lease time aging.
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4.9.4.2 DHCPv6/ND Protection
Based on the DHCPv6/ND Snooping binding table, the IPv6 Source Guard technology is
achieved by binding the applied IPv6 address/IPv6 address prefix with the port. The
system analyzes the packets between the subscriber and DHCPv6 Server/Relay or ND.
Before the subscriber obtains the configuration information, the upstream packets are all
dropped except for the packets with the unspecified source IP address and FE80 prefix
or ND packets. Once the DHCPv6 Ack/RA packets are detected, bind the allocated IP/IP
prefix and subscriber’s MAC address to the user port to enable upstream packets
transmission and ensure the allocated IP address /IP address prefix and MAC address
are the same as these of the upstream data, if not, drop the packets. When the rental
period expires, cancel the binding and stop transmitting non-DHCPv6/RS upstream
packets.
4.9.5 IPv6 Multicast
The system supports IPv6 multicast. The control plane establishes the multicast
forwarding table through processing the MILD packets to implement L2 forwarding of the
data platform according to the multicast forwarding table. The process flows are shown in
Figure 4- 7.
Figure 4- 7 Schematic Diagram of ZXDSL 9836 IPv6 Multicast
IPv6 multicast uses MLD protocol which is different from IGMP for IPv4 but the same in
multicast control.
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4.9.5.1 MLD Snooping
In the upstream direction, MLD Snooping deals with the MLD Report/Done packets sent
by the host, translates the subscriber VLAN to the multicast VLAN, forwards it to the
upper-layer router, and builds multicast group information. In the downstream direction,
MLD Snooping deals with the MLD Query packets transmitted by the specific router and
forwards them to the subscriber. Through setting aging time of the multicast group
member, the system deletes the subscribers with no response within a period to maintain
the L2 multicast forwarding table.
MLD Snooping with Proxy Reporting increases the report suppression, last leave, and
query suppression functions.
Report suppression : It intercepts, absorbes, and integrates the report messages
from the MLD host, and transmis the summarized MLD report messages to the
upstream interface where the multicast router is located, such as when the first
subscriber joins the multicast group and when the multicast group corresponds to
the MLD query.
Last leave : It intercepts, absorbes, and integrates the report messagess from the
MLD host, and transmis the summarized MLD leave messages to the upstream
interface where the multicast router is located, such as when the last subscriber
leaves the multicast group.
Querey suppression : It intercepts and processes the MLD query information.
Specified MLD queries are not transmitted to the user port. The general MLD
querey message is transmitted to the user port through relay mode when the user
port receives at least one multicast group.
4.9.6 MLD Proxy
In MLD Proxy mode, the system takes place of the router to periodically send MLD Query
packets to the subscriber and takes place of the subscriber to respond to the Query
packets from the upper-layer router.
MLD Proxy includes MLD Host and MLD Router. MLD Router runs on the interfaces on
the user side to terminate the report messages of the host. MLD Host runs on the
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interfaces on the network side and responds to the query packets of the multicast router.
MLD Proxy only forwards the join packet of the first subscriber and the leave message of
the last subscriber in the same multicast group, responds to the query packets of the
router, and takes places of the router to periodically send the query packets.
4.9.7 IPv6 Management
The same as the application in IPv4 network, the system possesses the general network
management capability in IPv6 network environment and is able to visit and control
through multiple protocols.
The system supports IPv4 and IPv6 dual stack. The applications above the TCP/UDP
layer are invisible. The system can configure the IPv4 and IPv6 addresses. The
application layer determines whether to use IPv4 protocol or IPv6 protocol according to
the type of the IP address. Under each condition, the characteristics of the application
layer remain the same. The services and network management supported by the system
can coexist under the dual stack.
4.10 Security
4.10.1 xPON Interface Data Security
xPON system transmits downstream in mode of broadcast and it is easy for a malicious
subscriber to intercept other subscribers information. To increase subscribers’ privacy, it
supports downstream:
Triple Churning
AES-128
4.10.2 Port Location
It identifies subscriber service stream channel and port, and implements port mapping
with each port numbered. The number can be used for AAA server to protect subscriber
accounts from theft and used for subscriber location locking.
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Layer2 DHCP relay agent:
Layer2 DHCP relay agent can change DHCP packets relay agent options (Option82)
defined by RFC3046 but not Giaddr domain.
It supports various formats, including TR-101 flexible format and multiple vendor
specified formats. It is configurable on port basis and VLAN basis.
PPPoE intermediate agent:
PPPoE intermediate agent adds port ID information to frames in PPPoE discovery
phase.
It supports various formats, including TR-101 flexible format and multiple vendor
specified formats. It is configurable on port basis and VLAN basis.
SVLAN:
SVLAN is used to encapsulate 802.1q protocol tag before 802.1q protocol tag. One layer
encapsulation is to identify customer network and the other is to identify service provider
network and it can be extended to realize subscriber line identification.
VBAS:
It reports subscriber practical slot / port number to BRAS through VBAS protocol.
It is in compliance with China information industry standard - VBAS Protocol Standard.
4.10.3 Traffic Restraint
Broadcast Storm Restraint:
It supports broadcast / flood restraint. It will discard broadcast stream when broadcast
stream including unicast and multicast exceeds the threshold the subscriber configures.
This decreases the broadcast occupation ratio in data stream to a reasonable level and
can avoid network traffic jam and ensure normal operation.
Its realization is based on port configuration.
IGMP/MLD packets restraint:
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It supports IGMP/MLD protocol packets restraint based on subscriber port to limit system
protocol packets access in one unit of time. This can prevent malicious attack and
provide system security.
DHCP protocol packets restraint:
It supports DHCP protocol packets restraint based on subscriber port to limit system
protocol packets access in one unit of time. This can prevent malicious attack and
provide system security.
CPU interface traffic restraint:
It supports storm control for the NM channel to control packets traffic which accesses
management system to ensure system light load under malicious attack.
4.10.4 MAC Filter
MAC address learning number limit:
It supports limiting MAC address learning number. If the learned MAC address number is
over configured threshold, new MAC address will be ignored and its packets will be
discarded unless there is MAC address which is aging.
Subscriber interface MAC address binding:
The subscriber interface with MAC address bound discards packets whose source
address is not this MAC address.
It only controls interface access side.
MAC address anti-migration (anti-cheating):
It prohibits subscriber interface learned MAC address to migrate to other subscriber
interfaces before aging.
It prohibits uplink port learned MAC address to migrate to other subscriber
interfaces.
MAC address filtering:
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It supports MAC address blacklist and whitelist.
Blacklist: It discards the data stream if its MAC address is listed in blacklist. For
those are not listed in blacklist, data streams are processed for next-step switching
management. It supports source and destination MAC address differentiation.
Whitelist: It discards the data stream if its MAC address is not listed in whitelist. For
those are listed in whitelist, data streams are processed for next-step switching
management. It supports source and destination MAC address differentiation.
4.10.5 IP Filtering
MAC-Forced Forwarding (MFF):
MAC-Forced Forwarding is in compliance with RFC4562. MAC-Forced Forwarding uses
a feature of proxy Address Resolution Protocol (ARP) to stop MAC address resolution
between clients. Without MAC-Forced Forwarding, the Ethernet Access Nodes in a
network forward valid ARP messages to the requested destination. With MAC-Forced
Forwarding, Ethernet Access Nodes intercept all ARP messages from clients and send
proxy ARP replies on behalf of the client’s Access Router. This stops the clients from
learning the MAC addresses of any other devices, and directs all traffic from the client
directly to the Access Router.
Subscriber interface IP binding:
IP address binding is to bind IP address with a specific subscriber interface. This can limit
subscriber access for only subscribers with their IP address bound with the interface can
access networks through the interface. This prevents illegal subscriber access through IP
address copy or theft.
DHCP Snooping:
In IPoE access scenario, the activities of using IP illegally, stealing service or forcefully
accessing network without DHCP configuration severely interfere unified management of
carriers and services for legal subscribers. It brings great threat to subscriber and system
security. DHCP Snooping technology ensures security through establishing and
maintaining DHCP Snooping binding list to filter unbelievable DHCP packets. The DHCP
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Snooping binding list includes unbelievable subscriber MAC address, IP address, lease
period, VLAN ID interface information. The technology can manage entities aging
through lease period.
DHCP Source Guard:
DHCP Source Guard technology realization depends on DHCP Snooping binding list. It
can bind the applied IP addresses with the interface and manage filtering based on
source IP addresses. This can effectively prevent IP address cheat and malicious
subscriber DOS attack thus increasing the system and subscriber security.
DHCP Spoofing:
UNI prohibits subscribers to set up DHCP Server illegally. All upstream protocol packets
which should be sent by DHCP Server will be discarded, such as OFFER-type protocol
packets.
4.10.6 ACL
UNI ACL:
Supports frame filter and restraint based on physical interfaces, source/destination
MAC address, VLAN ID, Ethernet type.
Supports frame filter and restraint based on source/destination IP address,
source/destination TCP or UDP interface, protocol type.
Supports illegal frame and illegal multicast filter such as customer-side multicast
stream filter.
NM channel ACL:
NM channel ACL is specialized in NM channel access policy. It supports IP address
whitelist configuration. Only main machine whose IP address is listed in the whitelist can
manage equipment. Management commands from other main machines are denied.
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4.10.7 Interface Security
Customer interface loop inspection:
If the physical loop exists in self-organized network in subscriber interface, the special
packets sent by the system can be back looped and snooped. Then the system blocks
the subscriber interface and configures this interface status to be loopback shut down.
This is different from the disabling by executing NM commands. At the same, it sends
alarm report to EMS.
UAPS (Uplink Auto Protection Switching):
UAPS adopts linkage hot backup mechanism for P2P application. Only one main linkage
is active and all services are beared on it. The backup/standby linkage is in IDLE status
and keeps real-time analyzing on main linkage working status.
When main linkage is broken due to physical layer signal loss such as fiber break,
disconnection and optical module damage, the backup/standby linkage inspects
immediately and automatically replaces to be new main linkage. At the same time, all
services move to this new linkage. An automatic protection alternation is successfully
accomplished.
When the faulty linkage is recovered, the system configuration decides if services will
return to it.
4.10.8 802.1x
IEEE 802.1x takes IEEE 802 LAN as its basic architecture and defines authorization and
authentication modes for equipment connected with a specific interface in LAN with P2P
characteristics. It can limit unauthorized subscribers or equipment access the interface to
enjoy access services supplied by LAN based on Client/Server access control and
authentication protocol. Before acquiring services supplied by LAN, 802.1x protocol must
implement subscriber/equipment authentication.
Interface role:
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The system interface supports authenticator and supplicant role-play and does not
support combining authenticator with authentication server. The authentication server
uses external Radius Server.
EAPOL protocol:
EAPOL is an encapsulation technology to exchange EAP packets between authenticator
and supplicant in LAN.
It supports 802.3 Ethernet EAPOL frame format. It supports priority ID and pure EAPOL
frames. It supports EAPOL frame exchanged between authenticator and supplicant and
EAP over Radius exchanged between authenticator and authentication server.
Interface network access control:
Interface network access control is for P2P connection. It supports authenticator PAE,
supplicant PAE, interface in and out of control, control interface authentication aging and
logoff mechanism.
4.11 Network Management
4.11.1 Management modes
SNMP:
It is in compliance with SNMP standards and provides SNMP V1 and V2c standards
support. It supports MIB II.
Telnet management:
It supports Telnet management interfaces and four Telnets connected to the system
synchronically.
It supports Telnet Agent to log in other equipment for management and maintenance
purpose through Telnet.
Console local management:
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It supports console management interface and man-machine commands are the same to
Telnet commands in aspects of execution and functions.
SSH management:
It supports SSH (V1, V2) to encrypt all transmission data to avoid person in-between
attack and DNS and IP cheat. Since the transmission data is compressed, the
transmission speed is increased.
OAM:
It supports OAM functions regulated in IEEE802.3-2005 Clause 57. It supports extended
OAM management defined in China Telecom EPON equipment technology regulation.
OMCI:
It supports OMCI functions regulated in ITU-T G.984.4/G.988 to manage GPON
configuration.
4.11.2 Fault Management
System onpower self-inspection:
It provides onpower self-inspection function to test core devices. If the self-inspection
fails, the system will not start.
Crash files:
The system records information of the latest CPU register running status, main service
management chip running features, and latest operation system running status. The
information is recorded for deeper analysis.
System log:
System log records system events such as subscriber logon events and system restart
events.
System operation log:
It records history of system operation through SNMP or Telnet/CLI.
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System remote reset:
It supports remote reset. The equipment reset adopts hard reset method with key parts
completely reset. The reset is similar to remote power off restart.
Configuration files recovery:
It supports configuration file local/remote up/download. This function enables
configuration file backup and recovery.
Configuration file automatic saving:
It supports periodically saving configuration files to avoid configuration modification
missing.
Dying Gasp:
It sends Dying Gasp alarm to EMS through SNMP or CTC specific extended OAM, when
the system is power OFF.
4.11.3 Performance Management
Interface traffic statistics:
It records the real-time interface traffic account including both input and output directions.
CPU occupation ratio statistics and alarm:
It supports CPU occupation dynamic inspection and static check.
Memory usage ratio statistics and alarm:
It supports memory usage dynamic inspection and static check.
4.11.4 Security Management
Username and password management:
It implements privilege management for login user and password to realize user and user
operation authorization. It provides VIP function.
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Managing user local/remote authentication:
It supports managing user local authentication. All authentication information is saved
locally.
It supports managing user remote authentication. User information is sent to Radius
server through Radius client for authentication purpose. No user information is saved
locally.
Multiple system versions support:
It supports saving multiple system versions locally and backwards when version
download fails.
Management channel real-time breaking check:
It supports real-time checking the connectivity with NM server to ensure management
linkage working normally.
4.11.5 Modem Remote Management
It supports ADSL2/2+ and VDSL2 Modem remote management.
Configuration management:
PVC connectivity and encapsulation configuration and management
IP address configuration and management
DHCP and NAT configuring switch function and DNS configuration
Factory configuration recovery
Troubleshooting:
Check CPE detailed information including CPE firmware version and software
version, CPE factory, set chip supplier, CPE interface type, CPE service
configuration, customer side interface information such as status, working rate and
mode.
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Remote reset and restart
Management methods:
SNMP PROXY
Telnet PROXY
HTTP PROXY
4.12 Environment Detection
Temperature alarm:
The system built-in temperature sensor can send temperature alarm to EMS when
working temperature is over configured threshold. The alarm informs system manager
that working environment has changed and equipment should not keep on running.
Fan detecting and controlling:
In dynamic mode, fan control card is able to detect fan rotating speed automatically in the
basis of ambient temperature, and provide real-time adjusting on it.
Dry contacts detecting (externally connected with environment detecting device):
The system supports four Boolean switch detecting. Working together with external
environment detecting device, it can realize various environment signals alarm report
related with power, heat exchanger, smog sensor, doorset sensor, and lightning
protection device.
Dry contacts detecting interface is the 6-pin interface located on main control card.
Console RJ45 interface can also connect with ZTE environment detecting device such as
EPM/EPS. It shares lines with Console, one part of threads can be used for Console,
another part can be used to transmit detecting data to EPM/EPS. For detailed
information, please see EPM/EPS operation manual.
Built-in battery management and intelligent power-saving policy:
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PWAM or PWAME card is able to provide backup power supply interface with which -48
V backup battery is connected.
In typical scenarios, battery is deployed as backup power. When 110/220V AC is in
working, it supplies power for 9836 and charges battery. Once 110/220V AC break down,
battery will supply power for 9836 in very short time.
When battery is supplying power, the system is able to activate intelligent power-saving
policy and prolong time of voice services endurance by shutting off broadband services
when battery voltage has fallen down below preconfigured safe value.
When battery is applied, whether serious service modules are power on are configurable.
Battery alarm management:
Connect Li/Fe batteries such as ZXA10 4810 through Console interface of main control
card. It supports following three types of alarms:
Input power OFF alarm: The external power supply is off and the Li/Fe battery
begins to supply power.
Low battery voltage alarm: In Li/Fe battery power supply mode, battery voltage is
below the threshold which is determined by battery and cannot be configured.
Battery trouble alarm: Li/Fe battery is faulty.
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5 Application Mode
5.1 Network Architecture
The end user requirements have changed from pure voice communication to multi-play
integration of voice, video, data and pictures. The newly emerged value-added services
such as IPTV and network phone call are having higher requirements in terms of network
bandwidth, QoS and security. The trend, cable withdrawal and fiber extension, is a
challenge for carriers in network especially access network construction. Both carriers
and equipment producers are taking efforts to fulfill variation and customization
requirements by introducing new technology and taking a maximum use of current
network resources as a condition. The ZXDSL 9836 is right the solution for such
application.
The ZXDSL 9836 is multi-service integration access equipment based on IP. It is working
as an all-service access platform. It can be used as traditional DSLAM as well as MDU or
AG in FTTB/C and FTTCab application scenario to provide various network architecture
modes such as xPON or GE network-side interfaces, VDSL2/ADSL2+/SHDSL/FE and
POTS network-side interfaces.
The following sections introduce the ZXDSL 9836 application in network architecture with
P2MP and P2P modes.
5.1.1 P2MP Network
Compared with P2P architecture, P2MP takes advantages in respect of network cost
saving such as feeding fiber saving, power saving, fast and flexible network deployment
and high standardization. Its maximum transmission distance can be 20 km with xPON
technology introduction. It supports multiple-level splitting configuration which enables
great flexibility in network deployment.
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Figure 5- 1 shows typical application of the ZXDSL 9836 in FTTC/Cab scenario. It adopts
GPON, EPON or 10GEPON to uplink and xDSL for subscriber access to realize far away
subscriber access.
Figure 5- 1 ZXDSL 9836 Application in P2MP Network (FTTC/Cab)
In FTTC and FTTCab scenarios, use the ZXDSL 9836 to differentiate coverage. The
ZXDSL 9836 can provide different bandwidth for different coverage such as 1.5 km, 500
m and 300 m radius coverage. It qualifies both indoor and outdoor installation methods
and can be installed in community central equipment room as well as in greenbelt or on
wall mounted poles to save network construction cost.
In P2MP network architecture, the ZXDSL 9836, as MDU equipment, connects with PON
equipment OLT to realize multi-service integration. Typical application in FTTC / FTTCab
scenario can provide subscribers with wide bandwidth and multiple services as well as
network protection.
5.1.2 P2P Network
P2P network qualifies with private subscriber bandwidth, small convergence rate and
flexible network architecture. It not only fulfills top-end subscriber high bandwidth
requirements but also provides enough protection and security. It mainly serves densely
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populated community, VIP customers with strict requirements of privacy protection or
commercial customers with broad band and high value requirements.
P2P system transmission distance can be as long as 70 km. So it is able to solve POP
moving down problem in Cable Withdrawal and Fiber Extension project. It allows access
node getting to subscribers as close as possible and this can promote services with
higher bandwidth.
Figure 5- 2 ZXDSL 9836 Application in P2P Network
In P2P network architecture, the ZXDSL 9836 can be installed in street cabinet. It is
connected to subscriber homes through twisted pair or Cat 5 cable. It supplies
subscribers with various access services including broadband, VoIP and IPTV. It uplinks
a network switch or a router through optical fiber in the mode of P2P to accomplish
service convergence.
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5.2 Service Type
5.2.1 Broadband data Service and Network
In both P2MP and P2P network architecture, one ZXDSL 9836 is able to support 192
ADSL2/2+ subscriber lines, 192 VDSL2 subscriber lines, 96 SHDSL.bis subscriber lines
or 96 FE subscriber lines. It also supports subscriber cards mixed-plugging. A subscriber
card can be plugged in any subscriber slot. It provides subscribers with high-speed
Internet broadband data services as well.
Figure 5- 3 ZXDSL 9836 Data Service Application
The ZXDSL 9836 supports flexible configuration of access modes. It can fulfill data
access requirements of residential inhabitants or commercial customers by providing 100
Mbps bidirectional high-speed Internet data service.
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5.2.2 VoIP Service and Network
Figure 5- 4 ZXDSL 9836 VoIP Service Application
The
ZXDSL 9836 contains a built-in VoIP processing unit which supports PSTN voice service
with POTS cards.
Internal IAD method: It is better used in newly established nodes to provide
subscribers with voice and broadband package service through built-in voice
management module.
External IAD method: It is better used for old nodes development or network
capacity extension to provide broadband access service for current IAD
subscribers.
VoIP service adopts highest priority and strict scheduling policy to decrease forwarding
delay and improve service experience.
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5.2.3 Video Service and Network
Figure 5- 5 ZXDSL 9836 IPTV Service Application
The ZXDSL 9836 features powerful QoS and multicast control and transmission
capability. It not only provides operational multicast and unicast control technologies but
also brings subscribers with vivid view enjoyment.
It is recommended to set the ZXDSL 9836 as multicast control point. On one hand, it
decreases workload of routers or BRAS for multicasting. On the other hand, it can control
subscribers privilege precisely, decrease multicast delay and increase service quality.
5.2.4 DDN Service and Network
The ZXDSL 9836 is a multi-service integration platform which is able to provide multiple
accesses. With SHDSL cards, 9836 is able to migrate traditional services based on
copper formerly, such as DDN, from PSTN network to PON network.
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Figure 5- 6 ZXDSL 9836 DDN Service Application
The ZXDSL 9836 is able to support CESoPSN (structured) or SAToP (non-structured),
encapsulate users’ TDM service in IP packets and transport them over PON network. On
the other side of backbone, MSAN or other devices are able to de-encapsulate them, and
send TDM service to the destination. In downstream, the ZXDSL 9836 is able to
de-encapsulate the CES packets to TDM data and transport them to users.
5.2.5 Triple-play Service and Network
The ZXDSL 9836 is a multi-service integration platform which is able to provide
triple-play service and gets payoff in maximum.
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Figure 5- 7 ZXDSL 9836 Triple-play Application
The ZXDSL 9836 is a multi-service integrated platform with the support of data, voice
and video services. It realizes integration of different network layers. These features
enable carriers to decrease network construction, operation and maintenance cost and to
promote network intelligence and fast response service.
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6 Technical Specifications
6.1 Equipment Specifications and Environment Indices
Table 6- 1 ZXDSL 9836 Specifications
Parameter Value
Dimensions240 mm x 482.6 mm x 132.9 mm (Depth x Width xHeight)
Weight 10.3--12 kg (full configuration)
Power consumption
192-line VDSL2: 216.6 W (50% subscribers active,profile 17a, tested in distance of 750m, DC powersupply)
192-line ADSL2/2+: 155.7 W (50% subscribersactive, tested in distance of 3000 m, DC powersupply)
384-line POTS: 170.0W (25% narrowbandsubscribers off-hook working, tested in short-loopmode, DC power supply)
192-line ADSL2/2+ and 192-line POTS: 313.2 W(100% broadband subscribers active, tested indistance of 3000m; 30% narrowband subscribersoff-hook working, tested in short-loop mode, DCpower supply)
Notes: Above power consumption is based on thetest with Ethernet (Optical * 2) uplink. If Ethernet(Electric * 2) uplink is configured, powerconsumption has an decrease of 2.0W in total. IfEPON(Optical * 1) uplink is configured, then powerconsumption has a decrease of 2.1W in total. If10GEPON uplink is configured, powerconsumption has an increase of 1.2W in total. IfGPON uplink is configured, power consumptionhas a decrease of 0.3W in total.
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Parameter Value
Heat ventilation Built-in speed-adjustable, active heat ventilation
Power supply
DC working voltage: - 48 V DC, ranging from – 40V DC to -57 V DC
AC working voltage: 110V AC / 220 V AC, rangingfrom 88 V AC to 290 V AC, and high voltage DCpower input ranging from 130 to 380V DC
Application environment &installation method
Indoor or outdoor installation, rack, indoor oroutdoor closure mounting
Table 6- 2 ZXDSL 9836 Environment Indices
Parameter Value
Environment temperature -30ºC - 60ºC
Environment humidity 5% - 95% (no condensation)
Cleanliness
Dust with the diameter of more than 5um andconcentration of less than 3 x 104 particles / m3 ,and non electrical conductivity, non magneticconductivity and non corrosive
Atmospheric pressure 70 – 106 Kpa
6.2 Interface Indices and Parameters
The ZXDSL 9836 provides various external interfaces as following tables list.
Table 6- 3 ZXDSL 9836 ADSL2/2+ Interfaces
Parameter Value
Standards complied ITU-T G.992.3, G.992.5 and ANSI T1.413
Port number per card 32
Port transmission rateMaximal upstream rate: 1 Mbps
Maximal downstream rate: 24 Mbps
The maximum transmissiondistance
6.5 km
Cable type Twisted cable
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Parameter Value
Spectrum occupationUpstream frequency: 30 kHz – 138 kHz
Downstream frequency: 138 kHz - 2.208 MHz
Modulation technology DMT (Discrete Multi-Tone) modulation
Table 6- 4 ZXDSL 9836 VDSL2 Interfaces
Parameter Value
Standards complied ITU-T G.993.2, G.992.1, G.992.3, G.992.5
Port number per card 32/24/16
Port transmission rate VDSL2 profiles 30a, downstream rate: 100 Mbps
The maximum transmissiondistance
Backward compliant with ADSL2/2+
Cable type Twisted cable
Frequency occupation Frequency range division defined by 993.2
Modem technology DMT (Discrete Multi-Tone) modulation
Table 6- 5 ZXDSL 9836 SHDSL Interfaces
Parameter Value
Standards complied ITU-T G.991.2, ETSI 101 524
Port number per card 16 (SHDSL.bis)
Port transmission rate 5.69Mbps over 2-wire, 22.76Mbps over 8-wire
The maximum transmissiondistance
6.5 km
Cable type Twisted cable
Frequency occupation Frequency range division defined by 991.2
Modem technology TC-PAM16, TC-PAM32
Table 6- 6 ZXDSL 9836 POTS Interfaces
Parameter Value
Standards complied ITU Q552
Port number per card 64
Port transmission rate 64k bit/s
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Parameter Value
The maximum transmissiondistance
5.5-6 km
Cable type Twisted pair
Codec PCM
Protocol TDM
Table 6- 7 ZXDSL 9836 Ethernet Megabit Interface (SNI and UNI)
Parameter Value
Interface name 100BASE-Tx100BASE-Fxsingle- mode
100BASE-Fxmultiple-mode
Standardscomplied
IEEE 802.3u IEEE 802.3u IEEE 802.3u
Interface type RJ-45 LC LC
Port number percard (SNI)
2 / /
Port number percard (UNI)
14+2(ETCD) 12(ETCF) 12(ETCF)
Interfacetransmission rate
Self-adaptive, 10 /100 Mbps
Full-duplex, 100Mbps
Full-duplex, 100Mbps
The maximumtransmissiondistance
100 m9 / 125 umsingle-mode fiber:15 km
62.5/125ummultiple-modefiber: 2 km
Cable / fiber typeCat 5 twistedcable or above
LD LD
Central wavelength
/ 1310 nm 1310 nm
Opticaltransmissionpower
/ -8 dBm - -14 dBm -23.5 dBm
Extinction ratio / 8.2 dB 8 dB
Maximumreceivingsensibility
/ -31dBm -29 dBm
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Table 6- 8 ZXDSL 9836 Ethernet Gigabit Interface (SNI and UNI)
Parameter Value
Interface name 1000BASE-Tx 1000BASE-Lx 1000BASE-Sx
Standardscomplied
IEEE 802.3ab IEEE 802.3z IEEE 802.3z
Interface type RJ-45 LC LC
Port number percard (SNI)
2 2 2
Port number percard (UNI)
2(ETCD) 2(ETCF) 2(ETCF)
Interfacetransmission rate
Self-adaptive,10/100/100 Mbps
1000 Mbps 1000 Mbps
The maximumtransmissiondistance
100 m9/125 umsingle-mode fiber:10 km
62.5/125ummultiple-modefiber: 275 m;
50/125ummultiple-modefiber: 550 m
Cable / fiber typeCat 5 twistedcable or above
LD LD
Centralwavelength
/ 1310 nm 850 nm
Opticaltransmissionpower
/ -9.5 dBm -9.5 dBm
Extinction ratio / 8.2 dB 9 dB
Maximumreceivingsensibility
/ -31 dBm -17 dBm
Table 6- 9 ZXDSL 9836 GPON Optical Interfaces
Parameter Value
Plug type SC / PC
PON number 1 or 2
Fiber type Single-mode fiber
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Parameter Value
Wave lengthTransmission end: 1310 nm (PON interface)
Receiving end: 1490 nm (PON interface)
PON interface standards ITU-T 984.x
Optical interface receivingrate
2.488 Gbps
Optical interface sendingrate
1.244 Gbps
Transmission wave lengthrange
1260 - 1360nm
Transmission end rootmean square spectral width
< 1mn (-20 dB)
Average output opticalpower
Minimum: 0.5dBm, Maximum: 5dBm
optical power while thegenerator is in outputswitch off status
< -45 dBm
Extinction ratio > 10 dB
Receiving wave lengthrange
1480 – 1500 nm
Receiver sensibility Better than -28 dBm
Linkage budget 28dB
Receiver full optical power Better than -8 dBm
Optical linkage length 20 km
Table 6- 10 ZXDSL 9836 EPON Optical Interfaces
Parameter Value
Plug type SC / PC
PON number 1 or 2
Fiber type Single-mode fiber
Wave lengthTransmission end: 1310 nm (PON interface)
Receiving end: 1490 nm (PON interface)
PON interface standards IEEE802.3-2005 1000BASE-PX10/20
Optical interface receiving 1.25 Gbps
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Parameter Value
rate
Optical interface sendingrate
1.25 Gbps
Transmission wave lengthrange
Minimum: 1260 nm;Maximum: 1360 nm
Transmission end rootmean square spectral width
< 3 nm
Average output opticalpower
Minimum: -1 dBm;Maximum: +4 dBm
optical power while thegenerator is in outputswitch off status
Maximum: -45 dBm
Extinction ratio > 9 dB
Receiving wave lengthrange
Minimum: 1480nm;Maximum: 1500nm
Receiver sensibilityBetter than -28 dBm (Test conditions: [email protected] Gbps)
Linkage budget > 26 dB
Receiver full optical power Minimum: -3 dBm
Receiver damage threshold 4 dBm
Optical linkage length Maximum: 20 km
Table 6- 11 ZXDSL 9836 10GEPON Interfaces
Parameter Value
Plug type SC / PC (SFP+)
PON number 1 or 2
Fiber type Single-mode fiber
Wave length
Transmission end: 1310 nm (10/1G asymmetric) or1270 nm (10/10G symmetric)
Receiving end: 1577 nm (10/1G asymmetric or10/10G symmetric)
PON interface standards IEEE 802.3av 10GBASE-PRX30/PR30
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Parameter Value
Optical interface receivingrate
10.3125 Gbps
Optical interface sendingrate
1.25 Gbps (10/1G asymmetric)
10.3125 Gbps (10/10G symmetric)
Transmission wave lengthrange
1260~1360 nm (10/1G asymmetric)
1260~1280 nm (10/10G symmetric)
Transmission end rootmean square spectral width
1 nm
Output optical power0.6~5.6 dBm (10/1G asymmetric)
4~9 dBm (10/10G symmetric)
Side mode suppressionmode
Minimum: 30 dBm
Extinction ratio> 9 dB (10/1G asymmetric)
> 6 dB (10/10G symmetric)
Receiving range 1574~1580 nm
Receiver sensibilityBetter than -28 dBm (10/1G asymmetric)
Better than -29 dBm (10/10G symmetric)
Receiver full optical power Minimum: -8 dBm
Optical linkage length More than 20 km
6.3 Key Technical Specifications
Table 6- 12 ZXDSL 9836 Key Technical Specifications
Parameter Value
VLAN list 4K
Q-VLAN ID,C-VLAN ID,S-VLAN IDrange
1 – 4094
VLAN translation list 2 K
Multicast list 2 K
MVLAN number 4
MAC address list capacity 4 K
MAC address number limit 1- 511 / port
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Parameter Value
ACL 1K
IGMP joining delay < 15 ms (single route)
IGMP leaving delay < 15 ms (single route)
System start time Default: < 3 minutes
MTBF 150000 hours
MTTR 30 minutes
6.4 Indicators
Table 6- 13 ZXDSL 9836 Indicators
Indicator Picture Status Description
Powercard
Powerindicator-RUN
GreenON
Power normal
RedON
Power fault
OFF Power OFF
Fan cardAlarmindicator-ALARM
RedON
Fan fault
OFFFan normalworking
Maincontrolcard
Runindicator-RUN
GreenON
Equipmentfault
OFFEquipmentrunning fault
FLASHEquipmentnormalworking
Powerindicator-PWR
GreenON
Power normal
OFF Power OFF
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Indicator Picture Status Description
Optical linkageindicator-L1
GreenON
Opticallinkagenormal
GreenFLASH
Trafficthroughopticalinterface
GreenOFF
Optical linkOFF
POTS orCOMBOsubscribercard
Runindicator-RUN
GreenON
Normalrunning
OFF Running fault
Alarmindicator-ALARM
RedON
Fault alarm
OFFNormaloperation
Hookon/offindicator-HOOK
GreenON
Hookoffsignal
OFFNo hookoffsignal
Ethernetsubscribercard
Interface linkageindicator (RJ45)
GreenON
Normallinkage
GreenOFF
Disconnection
Interface datareceiving andsending indicator(RJ45)
YellowFLASH
Data throughEthernetelectric port
YellowOFF
No datathroughEthernetelectric port
OFFNormaloperation
Interface linkageindicator
GreenON
Normallinkage
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Indicator Picture Status Description
OFF Disconnection
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7 Glossary
Table 7- 1 Glossary
Abbreviations Full Characteristics
ACL Access Control List
AES Advanced Encryption Standard
Alloc-ID Allocation Identifier
AN Access Network
ANI Access Node Interface
ARC Alarm Report Control
ARP Address Resolution Protocol
ATM Asynchronous Transfer Mode
AVC Attribute Value Change
BAS BAS Broadband Access Server
BSP Board Support Package
BW Bandwidth
CAC Channel Access Control
CAR Committed Access Rate
CATV Community Antenna Television
CDR Call Detail Record
CES Circuit Emulation System
CLI Command Line Interface
COS Class of Service
CRC Cyclic Redundancy Check
CVLAN Customers VLAN
DBA Dynamic Bandwidth Allocation
DBR Deterministic Bit Rate
DBRu Dynamic Bandwidth Report upstream
DSL Digital Subscriber Line
DTMF Dual Tone Multi-Frequency
EDFA Erbium Doped Fiber Amplifier
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Abbreviations Full Characteristics
EMS Element Management System
EPON Ethernet Passive Optical Network
ERP Ethernet Ring Protection
FE Fast Ethernet
FEC Forward Error Correction
FTP File Transfer Protocol
FTTB Fiber to the Building
FTTB/C Fiber to the Building/Curb
FTTBusiness Fiber to the Business
FTTC Fiber to the Curb
FTTCab Fiber to the Cabinet
FTTH Fiber to the Home
GCP Gateway Control Protocol
GE Gigabits Ethernet
GEM GPON Encapsulation Method
GFP Generic Framing Procedure
GPM GPON Physical Media (Dependent)
GPON Gigabit Passive Optical Network
GTC GPON Transmission Convergence
GUI Graphical User Interface
ICMP Internet Control Message Protocol
IMS IP Multimedia Subsystem
IP Internet Protocol
HDTV High Definition TV
HSI High Speed Internet
HSIA High Speed Internet Access
HW Highway
IP Internet Protocol
IPTV Internet Protocol Television
ITU International Telecommunication Union
L2 Layer 2
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Abbreviations Full Characteristics
L3 Layer 3
LACP Link Aggregation Protocol
LAG Link Aggregation
LAN Local Area Network
MAC Media Access Control
MDU Multi-Dwelling Unit
MIB Management Information Base
MPLS Multi-Protocol Label Switching
MSAN Multi-Service Access Network
MTU Multi-Tenant Unit
NAT Network Address Translation
NGN Next Generation Network
NE Network Element
NMS Network Management System
OAM Operations, Administration and Maintenance
OAN Optical Access Network
ODN Optical Distribution Network
OLT Optical Line Termination
OMCC ONU Management and Control Channel
OMCI Open Manage Client Instrumentation
ONT Optical Network Terminal
ONU Optical Network Unit
OSE Operation System Encapsulation
OSS Operation Support Subsystem
PCM Pulse Code Modulation
PIM-SM Protocol Independent Multicast - Sparse Mode
PIR Peak Information Rate
PLC Planar Light wave Circuit
PON Passive Optical Network
Port-ID Port Identifier
POTS Plain Old Telephone Service
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Abbreviations Full Characteristics
PSTN Public Switched Telephone Network
QoS Quality of Service
RARP Reverse Address Resolution Protocol
RR Round Robin
SBU Single Building Unit
SCB Single Copy Broadcast
SDH Synchronous Digital Hierarchy
SDTV Standard Definition TV
SFP Small Form-Factor Pluggable
SIR Sustained Information Rate
SLA Service Level Authentication
SN Serial Number
SNMP Simple Network Management Protocol
SNI Service Node Interface
SP Service Priority
SP Strict Priority
SS Soft Switch
STB Set Top Box
STP Spanning Tree Protocol
SVLAN Service VLAN
TC Transmission Convergence
TCP Transmission Control Protocol
T-CONT Transmission Container
TTL Transistor To Transistor Logic
UDP User Datagram Protocol
UNI User Network Interface
VAS Value-Added Services
VC Virtual Channel
VCC Virtual Channel Connection
VCI Virtual Channel Identifier
VLAN Virtual Local Area Network
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Abbreviations Full Characteristics
VoD Video on Demand
VoIP Voice over Internet Protocol
VP Virtual Path
VPC Virtual Path Connection
VPI Virtual Path Identifier
VPLS Virtual Private LAN Services
VPN Virtual Private Network
WDM Wavelength Division Multiplexing
WRR Weight Round Robin
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8 Standard Compliance
Table 8- 1 Standard Compliance
IEEE Std802.3ah-2004
Media Access Control Parameters, Physical Layers andManagement Parameters for Subscriber AccessNetworks
IEEE 802.3avPhysical Layer Specifications and ManagementParameters for 10 Gb/s Passive Optical Networks
YD/T 1475-2006 Access Network Technology Requirements – EPON
YD/T 1531-2006Test Method for Access NetworkEquipment——Passive Optical Network Based onEthernet(EPON)
YD/T 1771-2008Technical Requirements for AccessNetworks——Interoperability of EPON Systems
YD/T 1809-2008Testing Methods for Access Network——Interoperabilityof EPON Systems
China Telecom EPON Equipment TechnologyRequirements
ITU-T G.984.1General characteristics for Gigabit-capable PassiveOptical Networks (GPON)
ITU-T G.984.2Gigabit-capable passive optical networks (GPON):Physical media dependent (PMD) layer specification
ITU-T G.984.3Gigabit-capable Passive Optical Networks (G-PON):Transmission convergence layer specification
ITU-T G.984.4Gigabit-capable Passive Optical Networks (G-PON):ONT management and control interface specification
ITU-T G.984.5Gigabit-capable Passive Optical Networks (G-PON):Enhancement band
Broadband ForumTR-101
Migration to Ethernet-Based DSL Aggregation, April2006
Broadband ForumTR-156
Using GPON Access in the context of TR-101,December 2008
broadband forumTR-165
Vector of Profiles
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IEEE Std802.1D-2004
Media Access Control (MAC) Bridges
IEEE Std802.1Q-2005
Virtual Bridged Local Area Networks
IEEE Std802.1ad-2005
IEEE Standards for Local and Metropolitan AreaNetworks --Virtual Bridged Local Area Networks--Revision--Amendment 4: Provider Bridges(Amendmentto 802.1Q?-2005)
IEEE 802.3-2008
IEEE Standard for Informationtechnology—Telecommunications and informationexchange between systems—Local and metropolitanarea networks—Specific requirements Part 3: Carriersense multiple access with collision detection(CSMA/CD) access method and physical layerspecifications (Includes: IEEE Std 802.3ae-2002, IEEEStd 802.3af-2003, IEEE Std 802.3ah-2004, IEEE Std802.3aj-2003, IEEE Std 802.3ak-2004)(Revision ofIEEE 802.3-2002)
IEEE 802.1X-2004IEEE Standards for Local and Metropolitan AreaNetworks: Port-Based Network Access Control
ITU-T Y.1291An architectural framework for support of Quality ofService in packet networks
ITU-T H.248.1 Gateway control protocol: Version 2
ITU-T H.248.1 v3 Gateway control protocol: Version 3
YD/T 1292-2003 Media Gateway Control Protocol Based on H.248
IETF RFC3261 SIP: Session Initiation Protocol
IETF RFC1112 Host extensions for IP multicasting
IETF RFC2236 Internet Group Management Protocol, Version 2
IETF RFC 3376 Internet Group Management Protocol, Version 3
ITU-T G.992.1 Asymmetrical digital subscriber line (ADSL) transceivers
ITU-T G.992.3Asymmetric digital subscriber line transceivers 2(ADSL2)
ITU-T G.992.5Asymmetric Digital Subscriber Line (ADSL) transceivers- Extended bandwidth ADSL2 (ADSL2+)
ITU-T G.993.2Very high speed digital subscriber line transceivers 2(VDSL2)
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ITU-T G.993.5Self-FEXT Cancellation (Vectoring) for use with VDSL2transceivers
ITU-T G.991.2Single-Pair High-Speed Digital Subscriber Line (Shdsl)transceivers
ITU-T G.993.5Self-FEXT Cancellation (Vectoring) for use with VDSL2transceivers
ITU-T G.997.1Physical layer management for digital subscriber line(DSL) transceivers
ITU-T G.998.1 ATM-based multi-pair bonding
ITU-T G.998.2 Ethernet-based multi-pair bonding
ITU-T G.998.4Improved Impulse Noise Protection (INP) for DSLTransceivers
ITU-T G.999.1 LINK layer to PHY layer interface
YD/T 1185-2002 Access Network Technology Requirements –SHDSL
YD/T 1244-2002XDSL Equipment Electromagnetic ComplianceRequirements and Test Methods
SFF-8472Specification for Diagnostic Interface for OpticalTransceivers (Rev 10.3 Dec.1, 2007)
ITU I.430BASIC USER-NETWORK INTERFACE –LAYER 1SPECIFICATION
ETS 300 324-1
Signalling Protocols and Switching(SPS) V interfaces atthe digital Local Exchange(LE);V5.1 interface for thesupport of Access Network(AN);Part 1:V5.1 interfacespecification
ETS 300 347-1
Signalling Protocols and Switching(SPS);V interfaces atthe digital Local Exchange(LE);V5.2 interface for thesupport of Access Network(AN);Part 1:V5.2 interfacespecification
ETS 300 011Integrated Services Digital Network (ISDN); Primary rateuser-network interface, Layer 1 specification and testprinciples
ETS 300 166
Transmission and Multiplexing (TM); Physical andelectrical characteristics of hierarchical digital interfacesfor equipment using the 2 048 kbit/s-basedplesiochronous or synchronous digital hierarchies
ETS 300 233Integrated Services Digital Network (ISDN); Accessdigital section for ISDN primary rate
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ITU-T Rec. G.704Synchronous frame structures used at primary andsecondary hierarchical levels
ITU-T Rec. G.706Frame Alignment and Cyclic Redundancy Check (CRC)Procedures Relating to Basic Frame Structures Definedin Recommendation G.704 (Study Group XVIII) 19 pp