Post on 07-Mar-2018
transcript
System Description
MD-20 Mini DSLAM Digital Subscriber Line Access Multiplexer
Mandatory Regulations
Mandatory Regulations
The following sections describe the mandatory regulations that govern the installation and operation of the Mini DSLAM.
List of Terms
Table 1 lists the terms used in this chapter.
Table 1 List of Terms
Term Expansion
CE Conformité Européenne EEC European Economic Community FCC Federal Communications Commission
General Requirements
The sections that follow outline the mandatory regulations that govern the installation and operation of the Mini DSLAM. You must adhere to these instructions so that your system meets regulatory requirements.
Danger 1 – When removing cards from a shelf under power, some of the components such as the DC converters may be extremely hot. Handle by the card guides only.
Warning1 – This unit contains no user-serviceable parts. Refer servicing to qualified personnel. Warning 2 – To prevent accidental electrical short circuits, align the card correctly between the card guides before you insert it in the slot.
Prevention of Access
The Mini DSLAM must be accessible only to authorized personnel. Install this apparatus in a restricted access location or similar environment to prevent unauthorized access.
EMC Compliance
EMC compliance may require the use of ferrites, shielded cables or other special accessories. Where required, these special accessories must be installed as per the instructions.
I
Mandatory Regulations
United States
This section describes the mandatory regulations that govern the installation and operation of the Mini DSLAM in the United States.
Federal Communications Commission
This equipment has been tested and found to comply with the FCC requirements for emission of electromagnetic energy for Class A (part 15 subpart B).
European Regulations
EU Compliance Statement
This product complies with the requirements set out in the Council Directive on the Approximation of the laws of the Member States relating to Electromagnetic Compatibility Directive (89/336/EEC).
This product also complies with the Low Voltage Directive 73/23/EEC in order to comply with the requirements in the Council Directive 73/23/EEC relating to electrical equipment designed for use within certain voltage limits and the Amendment Directive 93/68/EEC.
General
This equipment must be permanently grounded.
Safety Approval
The system meets the Product Safety Requirements identified in EN60950: 2003.
II
Contents
Contents
Mandatory Regulations
List of Figures ............................................................................................................................ IV
List of Tables ............................................................................................................................... V
Preface ..........................................................................................................................................1
Scope ........................................................................................................................................ 1 Audience........................................................................................................................................ 1 Related Documentation................................................................................................................. 1 Documentation Conventions ......................................................................................................... 1
1 — System Description .........................................................................................................3
1.1 General Overview ......................................................................................................................... 4
1.1.1 Features ........................................................................................................................... 5 1.1.2 System Application........................................................................................................... 6
1.2 Hardware Architecture .................................................................................................................. 7
1.3 Technical Summary of the ............................................................................................................ 9
1.3.1 Physical Specifications..................................................................................................... 9 1.3.2 Environmental Specifications ........................................................................................... 9 1.3.3 Power Specifications ...................................................................................................... 10
1.4 Detailed Description .................................................................................................................... 11
1.4.1 Trunk Card ..................................................................................................................... 11 1.4.2 Line Card........................................................................................................................ 15 1.4.3 DC Power Card .............................................................................................................. 18 1.4.4 Cooling System .............................................................................................................. 19
2 — Software Introduction....................................................................................................21
2.1 General Overview......................................................................................................................... 22
2.1.1 Features of Management Interface ................................................................................ 23
2.2 Configuration Management .......................................................................................................... 24
2.3 Performance management........................................................................................................... 26
2.4 Fault Management........................................................................................................................ 29
Abbreviations
III
List of Figures
List of Figures
Figure 1-1 System application with GE1AC trunk card ............................................................................. 6
Figure 1-2 GE1AC Module Functional Block Diagram ........................................................................... 12
Figure 1-3 AL5EC/AL5BC/AL5AC Module Functional Block Diagram ................................................ 15
Figure 2-1 Management Software Model.................................................................................................. 22
IV
List of Tables
Table 1-1 GE1AC Card Controls and Indicators....................................................................................... 14
Table 1-2 AL5EC/AL5BC/AL5AC Card Controls and Indicators............................................................ 17
Table 1-3 DC Power Card Controls and Indicators ................................................................................... 18
Table 1-4 FAN Card Controls and Indicators ............................................................................................ 19
V
List of Tables
VI
Preface
Scope
This document provides an overview on the Mini DSLAM. It contains:
Descriptive material about the DSLAM and its units (chapter 1)
Descriptive material about the software of the DSLAM (chapter 2)
Expansions of abbreviations used in the manual (Abbreviations)
Audience
The guide is intended for system engineers or operating personnel who want to have a basic understanding of the Mini DSLAM.
Related Documentation
For information about installing, operating and maintaining, and troubleshooting the DSLAM, refer to the Mini DSLAM R3.1 HW Installation and User Guide. For information about how to manage the DSLAM through Command Line Interface (CLI), refer to the Mini DSLAM R3.1 CLI Command Reference Guide. For information about how to manage the DSLAM through Web GUI, refer to the Mini DSLAM R3.1 Web Configuration Tool Guide.
Documentation Conventions
The following conventions are used in this manual to emphasize information that will be of interest to the reader.
Caution — The described activity or situation might or will cause service interruption.
Note — The information supplements the text or highlights important points.
1 / 34
2 / 32
1 — System Description
1.1 General Overview
1.2 Hardware Architecture
1.3 Technical Summary
1.4 Detailed Description
3 / 34
1— System Description
1.1 General Overview
The Mini DSLAM R3.1 is a 2U high box-type DSLAM with a rack-mountable enclosure. There is also an optional 2U high system. The 2U system provides 4 slots for one trunk card and 3 line cards.
The Mini DSLAM R3.1 provides Gigabit Ethernet (GbE) for trunk interface and 24 ports ADSL for each line card. It is also suitable for small size application and can be easily deployed in remote location, for instance, remote terminal, business parks, street cabinets, etc… to extend the service reach distance.
The Mini DSLAM can act as a Subtending-DSLAM or as a stand-alone DSLAM.
The system includes:
Trunk Card: GE1AC
It provides the trunk interface, and it is also the system control module to provide the DSLAM system OAM&P function.
Line Card: AL5EC, AL5BC, AL5AC AL5EC: 24 ports ADSL line card with on-board ETSI option A POTS splitter
AL5BC: 24 ports ADSL line card with on-board ETSI 2B1Q and 4B3T ISDN splitter
AL5AC: 24 ports ADSL line card with on-board ANSI 600Ohm POTS splitter
A DC power card
A cooling system: including a fan card and an air filter
4 / 32
1 — System Description
1.1.1 Features
The Mini DSLAM R3.1 provides the following features:
Compact size, low cost, easy installation with upgrading system facility and software
Standard-based with remote configuration, suitable for any location
Support rich Ethernet and application protocols
Provide ADSL, ADSL2/2+ services
Provide advanced QoS
Support ingress VCL policing for all supported ATM service categories
User-Friendly CLI, web-based management interface
Support system software download via FTP for both local and remote terminals
Support database export and import functionality via TFTP for configuration backup and restoration
Support Simple Network Time Protocol (SNTP) to automatically calibrate the time and date of the system
Support system temperature monitoring and automatically controlling fan operation according to system temperature
Support system overheating automatic shutdown
Meet CE requirement
5 / 34
1— System Description
1.1.2 System Application
IP DSLAM with GE1AC trunk card
Figure 1-1 Mini DSLAM system application with GE1AC trunk card
The Mini DSLAM R3.1 supports up to 3 ADSL line cards per 2U box. Each ADSL line card provides 24 lines, enabling the DSLAM to support a total of 72 ADSL lines per 2U box.
User can manage the system with CLI/SNMP/Web GUI via in-band/out-band management channel.
6 / 32
1 — System Description
1.2 Hardware Architecture This section describes the shelf, card types, blanking plate, power system, and cooling system that make up the Mini DSLAM. Described locations are based on the DSLAM mounted horizontally, with the side that has the card slots facing forward.
The DSLAM has the following types of cards:
One trunk card (slot 0)
Up to three line cards which support ADSL and POTS subscriber service (slot 1 to 3)
Shelf
The shelf provides factory-installed mounting flanges for installing the DSLAM in racks and outside cabinets or onto wall-mounting brackets.
The shelf has slots for installation of one trunk card and up to a combined total of five line cards for 2U
high shelf.
Trunk Card
The Mini DSLAM R3.1 supports one type of trunk cards: the GE1AC.
The GE1AC provides the control function and the mapping between Ethernet and ATM for the Mini DSLAM system. The system uses only one GE1AC. The card is field-installable and field-replaceable. Replacing the trunk card only affects DSL service for the subscribers.
The GE1AC has six connectors; two connectors are for the Ethernet electrical uplink, two connectors are for the fiber optics uplink, one connector is for local craft port, and one connector is for the Ethernet management interface.
The GE1AC has LEDs to indicate the status of the system, the status of the alarm, and the status of the Ethernet uplinks.
Line Cards
The Mini DSLAM R3.1 supports one type of line card: the ADSL card.
The ADSL card provides ADSL modem and POTS/ISDN splitter functions for the DSLAM. It also passes ADSL traffic in the form of ATM cells to and from the trunk card through the backplane.
The DSLAM can support up to three ADSL cards for 2U system. Each ADSL card can support up to 24 subscribers. The card is field-installable and field-replaceable.
7 / 34
1— System Description
The ADSL card has two connectors; one is for sending and receiving POTS/ISDN traffic to and from the PSTN, the other is for sending and receiving ADSL subscriber traffic to and from the subscribers.
The ADSL card has LEDs to indicate the status of the card and the status of the ADSL port.
There are three variants of the ADSL card:
AL5EC: Annex-A line card with on board ETSI option A POTS splitter
AL5BC: Annex-B line card with on board ETSI 2B1Q and 4B3T ISDN splitter
AL5AC: Annex-A line card with on board ANSI 600Ohm splitter
Blanking Plate
A blanking plate has no circuitry, LEDs, or connectors. It is used in any unfilled slot to maintain system EMI containment and system cooling integrity.
Backplane
The backplane is a printed circuit board that provides connectivity between the cards, cooling system, and the power system. It is factory-installed towards the back of the shelf.
Power System
The 48V dual DC inputs are provided through the DC power card. The terminal block on the DC power card receives – 48 vdc input power and carries it to the backplane. Each line card and trunk card has individual power module. The power module is supplied with – 48 vdc input power by the backplane.
Cooling System
The cooling system of the Mini DSLAM consists of a fan card and an air filter.
The fan card has two axial fans to blow air through the DSLAM for cooling. The fan card is field- installable and field-replaceable.
The air filter is for trapping air-bourn particulates. The filter is field-installable and filed-replaceable. The air filter can be replaced without removing the fan card.
The cooling system has one bi-color LED on the fan card to indicate the status of the fan card.
There are two variants of the fan card:
FA1AC: Fan card for 2U Chassis
There are also two variants of the air filter: for 2U Chassis.
8 / 32
1 — System Description
1.3 Technical Summary
1.3.1 Physical Specifications
Item Value
Width 482.6 mm (19 in.)
Height 88.9 mm (2U)
Depth 256 mm (10 in.)
Weight 4.4 Kg with no units installed (2U)
Each unit weight:
- GE1AC card: 0.5 Kg
- AL5EC/AL5BC/AL5AC card: 1.4 Kg
- FA1AC card: 0.25 Kg
- DC power card: 0.16 Kg
- air filter (including the blanking plate): 0.1 Kg
Rack Standard rack (19” or 23”)
1.3.2 Environmental Specifications
Item Value
Operating Temperature -40 ~ 65°C
Relative Humidity 5% to 95% (non-condensing) at 35°C
9 / 34
1— System Description
1.3.3 Power Specifications
Item Value
Power Supply Interface Dual A+B feeds, -72V ~ -36V DC, nominal – 48V
Power Requirement 3.25A@48V, no greater than 150 W for a single 2U shelf at full capacity operation
Power Consumption:
GE1AC
AL5EC, AL5BC, AL5AC
FAN
Chassis (DC card + backplane)
19 W (max)
30 W (max)
12.7 W (max)
5 W (max)
10 / 32
1 — System Description
1.4 Detailed Description
1.4.1 Trunk Card
The Mini DSLAM R3.1 uses Gigabit Ethernet interface for an uplink to the Ethernet Metropolitan Area Network (E-MAN). The GE1AC card transmits ADSL traffic between the subscriber equipment (router, bridge/modem or network interface card) and the E-MAN.
The GE1AC card provides a user-networking interface with Ethernet packets and ATM cells mapping. This card provides a high bandwidth to assemble the Ethernet traffic as well as the ADSL service.
The GE1AC card is not only the system trunk module to provide trunk interface, but also the system control module to provide system OAM&P function.
Features
Provide combo trunk interface with both electrical (RJ-45) and fiber optical (SFP) ports
Support 48V power output over its Ethernet port (Power over Ethernet, PoE) for its GE electrical interfaces per IEEE 802.3af
Support SW remote download
Provide an internal battery to sustain the system configuration, alarm history, and event log for a minimum of three days
Provide one craft interface with RJ45 jack on the front panel
Provide one Ethernet interface with RJ45 jack on the front panel for out-band management
Support IPv4 packet
Provide AAL5 traffic conversion between ATM and Ethernet per RFC 2684
Support IEEE802.1d Ethernet bridge function between trunk Ethernet ports
Support Rapid Spanning Tree Protocol (RSTP) for the trunk interfaces per IEEE 802.1w
Support automatic source MAC learning and block duplicate ones (the system is able to maintain 4K entries in its own MAC address table with maximum supported number 128 per port)
Support IEEE 802.1q Port-base VLAN and Tag-base VLAN
Support static VLAN management
Support Link Aggregation in IEEE 802.3ad that allows 2 GBE links to be aggregated together as a logical link. Support both LACP protocol (dynamic) and no LACP protocol (static)
Support IP multicast forwarding
Support VLAN aware IGMP snooping v1 and v2 per RFC 1112 and RFC 2236
11 / 34
1— System Description
Support DHCP Option 82 (RFC 3046 – DHCP Relay Agent Information Option) and PPPoE Relay
Support Simple Network Time Protocol (SNTP) version 4 for IPv4
Support Layer-2 frame filtering based on source MAC addresses/ VLAN IDs/ port numbers
Support Layer-3 filtering based on IP source/destination address, protocol ID, and TCP/UDP port number
Support VLAN level QoS function per IEEE 802.1p and support 4 priority queues for QoS
Module Functional Block Diagram
NetworkProcessor
To ShelfBackplane
PowerModule
BUSDriver
GTLP EthernetPHY
EthernetPHY
Uplink Interface
Uplink Interface
PowerConnector
Figure 1-3 GE1AC Module Functional Block Diagram
After the line cards aggregate 24 ports DSL traffic into the network processor of GE1AC card through high-speed serial GTL bus, the network processor terminates the ATM traffic into Ethernet packets through its SAR (Segmentation and Reassembly) function. The network processor also provides the Layer-2 Ethernet functions; it can map the ATM VCI to VLAN ID (802.1q) and priority queues (802.1p).
Through the two GbE uplink interfaces, the system can provide Link Aggregation (802.3ad), VLAN stacking, and Rapid Spanning Tree (802.1w) as a ring protection architecture.
12 / 32
1 — System Description
Card Specifications
Description Specification
Main Board Dimensions 258.2 mm × 235 mm × 20 mm (width × depth × height)
(This include the faceplate and PCB)
Trunk Interface Two IEEE 802.3 10/100/1000 Base-T auto-sensing GbE trunk ports. And the selection of speed for each port is independent.
Support auto-adaptive between full-duplex and half-duplex operation modes for 10 and 100 Mbps operation speed on a per trunk port basis. The system only supports full-duplex mode for 1000 Mbps.
Support both RJ45 and optical SFP (Mini-GBIC) connectors for each trunk port.
For the optical trunk port: support 1000 Base-TX/SX/LX/EX/ ZX fiber interfaces (defined in IEEE 802.3ab) simultaneously.
Support 48V power output over the Ethernet port (Power over Ethernet, PoE; this function needs to be set via jumpers on the PCB. Also, to support PoE function, the system input power must be between -46 ~ -59 Vdc.) for the GbE electrical interfaces per IEEE 802.3af.
Capacity Supports up to 5 service cards.
Management Interface In-band management: provide all system OAM&P functions: software updates, and management system interaction through Ethernet trunk port.
Out-band management: provide two kinds of management interfaces. One is the RS-232 local craft interface for basic provisioning. Interface default configuration: 9600 baud rate, 8-bit data, none parity, and 1 stop bit. The other is a 100 Base-T auto-sensing Ethernet Interface.
OAM&P Configuration Management
Performance Management
Fault Management
Status Monitoring.
Provides NV-RAM to backup system configuration data, and data base export/import mechanism.
Backplane connector Signal connector: 96 pins female connector
Power connector: 24 pins female connector
Control Button HW Reset hidden button.
HW ACO button.
LED 4 LEDs on the front panel or RJ45 to indicate system, alarm and Ethernet link status
13 / 34
1— System Description
Controls and Indicators
Table 1-1 GE1AC Card Controls and Indicators
Front View of GE1AC Card
LED Description
SYS To indicate the system operation status
ALM To indicate the system alarm status
GBE1 To indicate the optical trunk port status
GBE2 To indicate the optical trunk port status
GBE1- Speed GBE2- Speed
(LED on RJ-45)
To indicate the electrical trunk port transmission speed
(orange color LED on the Ethernet port)
GBE1- Link/Act GBE2-Link/Act
(LED on RJ-45)
To indicate the electrical trunk port link status
(green color LED on the Ethernet port)
MGMT- Speed
(LED on RJ-45)
To indicate the transmission speed of the Ethernet management port
(green color LED on the Ethernet port)
MGMT- Link/Act
(LED on RJ-45)
To indicate the link status of the Ethernet management port
(orange color LED on the Ethernet port)
Interface Description
GBE1 Gigabit Ethernet trunk port 1
GBE2 Gigabit Ethernet trunk port 2
MGMT Ethernet Port connected to LAN for providing system out-band EMS/Telnet control interface, such as system monitor, control or software upgrade.
COM RS-232 port connected to the terminal for monitoring and controlling the trunk card.
Button Description
ACO Alarm Cut Off
RST A hidden reset button for hardware resetting.
14 / 32
1 — System Description
1.4.2 Line Card
Features
Provide 24 ADSL ports compliant with ANSI T1.413, ITU-T G.992.1 Annex A&B, ITU-T G.992.3 Annex A&B&L (ADSL 2, READSL2), and ITU-T G.992.5 Annex A&B (ADSL 2+)
AL5EC: on-board POTS splitter module compliant with ETSI option A
AL5BC: on-board ISDN splitter module compliant with ETSI Annex B (2B1Q/ 4B3T)
AL5AC: on-board ANSI 600 Ohm POTS splitter
Provide hot swappable feature
Support fast and interleave (SW) configurable modes
Support auto-recovery after each ADSL loop failure
Support rate-adaptation in default
Support power back-off when the SNR margin exceeds the configured maximum SNR margin
Module Functional Block Diagram
DSP
AFELineDriver
Splitter
PowerBlock
Host Bus
Data Bus
Power
ToSubscriber
Loop
ToPSTN
ToBackplane
TALT
Figure 1-4 AL5EC/AL5BC/AL5AC Module Functional Block Diagram
15 / 34
1— System Description
Card Specifications
Description Specification
Dimensions 358.4 mm × 235 mm × 20 mm (width × depth × height)
(This include the faceplate and PCB)
ADSL Module ADSL signal modulation and demodulation.
Standard Compliant: ANSI T1.413, ITU-T G.992.1 (G.DMT) Annex A&B, G.992.2 (G.Lite), G.992.3 (ADSL2) Annex A&B&L, G.992.5 (ADSL2+) Annex A&B
Handshake procedure of each DMT ATU-C ADSLx circuit complies with ITU-T G.994.1.
Physical layer management of each DMT ATU-C ADSLx circuit complies with ITU-T G.997.1.
DMT ADSL supports either the Fast Channel or the Interleaved Channel.
Capacity 24 Ports/Card
Splitter Module 24 ports splitter module compliant with ETSI TS 101 952-1-1 option A for European, ETSI TS 101 952-1-3 for Annex B European ISDN, or ANSI 600
System Control Provides all system OAM&P information requested by the trunk card.
Front Access Interface ADSL signal connector (50-pin male connector)
VF connector (50-pin male connector)
Backplane connector Signal connector: two 96 pins female Feature Bus+ connector
Power connector: 24 pins female Feature Bus+ connector
Control Button Service On/Off button
LED 2 tri-color (green, red, yellow) LED indicators for the Service and ADSL port status.
16 / 32
1 — System Description
Controls and Indicators
Table 1-2 AL5EC/AL5BC/AL5AC Card Controls and Indicators
Front View of AL5EC
Front View of AL5BC
Front View of AL5AC
LED Description
UNIT To indicate the ADSL card operation status
LINK To indicate ADSL line link status
Interface Description
POTS VF connector. (50-pin dual row header)
LINE ADSL signal connector. (50-pin dual row header)
Button Description
Service ON/OFF
To set the service status On/Off
17 / 34
1— System Description
1.4.3 DC Power Card
Features
Dual DC 48V input terminals with protection, isolation and soft start function
Provide a SWITCH to turn ON/OFF the - 48V DC power
LED Indicates whether or not the - 48V DC power of the system is working
RJ45 provides 1 alarm contact outputs and 4 housekeeping alarm inputs
Dimensions
The dimensions of the DC Power card are (including the faceplate and PCB):
width: 99.6 mm depth: 235 mm height: 20 mm
Controls and Indicators
Table 1-3 DC Power Card Controls and Indicators
Front View of DC Power Card
LED Description
ACT To Indicates the system is power ON/OFF.
Switch Description
Power Switch To turn ON/OFF the dual A+B 48V DC power.
Interface Description
HK & ALM (RJ45 jack) System housekeeping and alarm contact output terminal.
DC 48V IN Dual A+B 48V DC Power input terminal.
18 / 32
1 — System Description
1.4.4 Cooling System
The cooling system includes a fan card (FA1AC or FA2AC) and an air filter for trapping air-bourn particulates.
Features
FA1AC: built-in 2 DC fans with error indicating signal to trunk card for monitoring the status of fan module
The fan will be turned on when system temperature is higher than T°C; it will be turned off when system temperature is less than T-10°C (the temperature threshold T can be configured).
Support hot swapping mechanism
Dimensions
Card Name Width Depth Height
FA1AC (2U) 43.0 mm 235 mm 88.9 mm
Controls and Indicators
Table 1-4 FAN Card Controls and Indicators
Front View LED Description
ACT To indicate the FAN card status.
Control Description
ESD Grounding Socket
After the shelf being rack-mounted, for protecting the system from electrostatic discharges damage.
(For Anti-static wrist strap usage)
19 / 34
1— System Description
20 / 32
2 — Software Introduction
2.1 General Overview
2.2 Configuration Management
2.3 Performance Management
2.4 Fault Management
21 / 34
2 — Software Introduction
2.1 General Overview The software architecture of the Mini DSLAM is shown in the figure below. It can be divided into three layers: the management layer, the OAM&P layer, and the firmware layer.
Figure 2-1 Management Software Model
As in the figure, CLI shell, SNMP agent, and WEB server are in the top-most layer (management layer) of the system software and offering OAM&P function of the DSLAM based on the conceptual management features as follows:
Configuration Management
Performance Management
Fault Management
The Mini DSLAM uses NVRAM as the database (DB) to store system configuration parameters, alarms and events. The firmware layer includes line card control drivers, Memory and I/O control, etc.
22 / 34
2 — Software Introduction
2.1.1 Features of Management Interface
Support CLI, SNMP (v1, v2c), and web-based GUI management interface through both in-band and out-band channels
Support 5 users accessing simultaneously for each management interface
The in-band management connection of GE1AC card is the highest priority of all supported in-band traffic categories
Support out-band management via:
- UART at full duplex line rate of 9600 bps (Craft port)
- 100 base-T Ethernet
Support Telnet interface for remote operators to login system operating console
The IP address and subnet mask of the system for management are provision-able with a default of 192.168.1.1 and 255.255.255.0.
23 / 34
2 — Software Introduction
2.2 Configuration Management The configuration management contains the following aspects:
1. System Setup: Interface setup, User Administration, SNTP setup.
2. Bridge Setup
3. ATM traffic management
4. ADSL Profile
5. System inventory and configuration information query
The configuration management provides detecting and reporting to the operators through SNMP Trap for all memory updates reflecting changes in the system configuration. It also provides logging the changes in the operational state and making this information available (on-demand) to the operators over the operation interface.
The system contains a database (DB) to store all the provisioning data so that the configuration can be restored in re-booting. Authorized operators can query the DB to obtain configuration data.
Bridge Setup
The bridge setup of the Mini DSLAM includes the following aspects:
Basic Interface setup
VLAN configuration: static VLAN, priority remark, broadcast/multicast rate limit, VLAN Cross connection
Spanning Tree Protocol
Filtering: filtering rule, ACL
Forwarding: forwarding database
PPPoE and DHCP Relay
IGMP configuration
24 / 34
2 — Software Introduction
ADSL Module Configuration
Configuration for a user port at ADSL module is provisioned by the parameter set, which is a group of attributes that determine the user port behaviors; and we call it as profile.
The system provides users up to 72 profiles for each type (see below). One of the profiles is a fix default that cannot be modified; users are allowed to create, delete, and edit the other 71 profiles. The profiles include the following types:
ADSLx Line Spectrum Profile
Including the common transmission parameters, carrier mask parameters, HAM and AM band parameters, and ADSL2/READSL2/ADSL2+ parameters.
ADSLx Service Profile
Including the bearer service parameters.
The ADSL configuration also includes the function for user to query the line status, the physical layer status, and the channel interface status for ATU-C and ATU-R.
25 / 34
2 — Software Introduction
2.3 Performance management Performance management supports performance monitoring by collecting and thresholding performance parameter counters against 15-miniute intervals for each interface and module respectively.
Performance statistics include the following:
1. Statistics for current interval: A real-time aspect contains the reflection of the current value situation before the new interval. The current value includes values of current 15-min interval and current 1-day interval.
2. Statistics history at 15-minute basis: The system stores previous 96 statistics of PM parameters at 15-min interval for retrieving.
3. Statistics history at 1-day basis: The system stores previous 7 statistics of PM parameters at 1-day interval for retrieving.
Most of the performance parameter thresholds are user-programmable. The Mini DSLAM uses a threshold crossing alert (TCA) to notify the management system when one of the counts during a measurement interval exceeds its threshold.
The TCA contains the following information:
– Specific interface involved – Error condition identifying the measurement type – Occurrence date and time of the event
ADSL PM
The IP DSLAM provides the following ADSL PM:
Item Description
ATUC_LOSS Loss of signal second
ATUC_LOFS loss of frame Seconds
ATUC_LOMS loss of margin Seconds
ATUC_LPRS loss of power Seconds
ATUC_ESE Excessive Severe Errors Seconds
ATUC_ES Errored Seconds
26 / 34
2 — Software Introduction
ATUC_SES Severely Errored Seconds
ATUC_UAS Unavailable Seconds
ATUC_ReInitCounter The number of times the modem left showtime and tried to re-initialize the line because of detection of a persistent defect
ATUC_FailedInitCounter The number of times the modem tries to initialize the line but fails.
ATUC_CellCount The number of upstream ATM cell received with a correct HEC.
ATUC_HEC The number of upstream ATM HEC violations.
ATUC_CVS The counter associated with the number of Coding Violations encountered by the channel.
ATUC_FECCS The counter associated with the number of corrected codewords encountered by the channel.
ATUR_LOSS Far End Loss of signal second
ATUR_LOFS Far End loss of frame Seconds
ATUR_LOMS Far End loss of margin Seconds
ATUR_LPRS Far End loss of power Seconds
ATUR_ESE Far End Excessive Severe Errors Seconds
ATUR_ES Far End Errored Seconds
ATUR_SES Far End Severely Errored Seconds
ATUR_UAS Far End Unavailable Seconds
ATUR_CellCount The number of downstream ATM cell received with a correct HEC.
ATUR_CVS The far end counter associated with the number of Coding Violations encountered by the channel.
ATUR_FECCS The far end counter associated with the number of corrected code words encountered by the channel.
27 / 34
2 — Software Introduction
The Performance Manager (PMgr) of the system shall provide the following PM threshold.
NE threshold FE threshold
15min ES threshold 15min ES threshold
15min SES threshold 15min SES threshold
15min UAS threshold 15min UAS threshold
24hour ES threshold 24hour ES threshold
24hour SES threshold 24hour SES threshold
24hour UAS threshold 24hour UAS threshold
28 / 34
2 — Software Introduction
2.4 Fault Management
Fault management is conceptually partitioned into two levels: the system top level, and interface-specific level. Both levels are alarm-level configurable and can be Major, Minor, and/or Masked. Fault management provides the alarm output through hardware output interface (on the DC power card) and visible indicator (LED). The Mini DSLAM supports query of all current alarm status. It is also able to keep 256 records of historical alarms and events respectively.
System Alarms
The Mini DSLAM provides the following System alarms:
House Keeping Alarm 1
House Keeping Alarm 2
House Keeping Alarm 3
House Keeping Alarm 4
Fan Alarm
Above Temperature
Below Temperature
Line Card unequipped
DC Power Card Fail
LT card Power Fail
LT card shutdown due to high temperature
Self-test Fail
ADSL Alarms
The Mini DSLAM provides the following ADSL alarms:
LOF (Loss of Frame) -Near End/Far End
LOS (Loss of Signal) -Near End/Far End
LOM (Loss of Margin) -Near End/Far End
LPR (Loss of Power) -Far End
LOL (Loss of Line) – Near End/Far End
ESE (Excessive Severe Errors) -Near End/Far End
UAS (Unavailable Seconds) –Near End/Far End
COMMF: Unable to communicate with peer modem -Far End
29 / 34
2 — Software Introduction
NOPEER: No peer present – Far End
LCD (Loss of Cell Delineation) -Near End/Far End
LORATE (Line rate is below planned rate)-Near End/Far End
NCD (No Cell Delineation) -Near End/Far End
30 / 34
Abbreviations
ADSL asymmetrical digital subscriber line ADSLx ADSL/ADSL2/ADSL2+ ANSI American National Standards Institute ATM asynchronous transfer mode CLI command line interface DSLAM digital subscriber line access multiplexer EMS element management system DSL digital subscriber line EMC electromagnetic compatibility EMI electromagnetic immunity ETSI European Telecommunications Standards Institute Mbps megabit per second LED light emitting diode POTS plain old telephone service PSTN public switched telephone network PVC permanent virtual circuit SNMP simple network management protocol UNI user-network interface
31 / 34
32 / 34
33 / 34