01-OSN 3500 System Description

OptiX OSN 3500 Technical Manual - System Description Contents

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Contents

1 Network Application............................................................................................................ 1-3

2 Functions ................................................................................................................................ 2-3

2.1 Capacity .......................................................................................................................................2-3 2.1.1 Cross-Connect Capacity .....................................................................................................2-3 2.1.2 Access Capacity of Slots ....................................................................................................2-3 2.1.3 Service Access Capability ..................................................................................................2-3

2.2 Interface .......................................................................................................................................2-3 2.2.1 Service Interface.................................................................................................................2-3 2.2.2 Administration and Auxiliary Interfaces.............................................................................2-3

2.3 Built-in WDM Technology ..........................................................................................................2-3 2.4 Extended Subrack ........................................................................................................................2-3 2.5 REG..............................................................................................................................................2-3 2.6 Clock............................................................................................................................................2-3 2.7 Protection .....................................................................................................................................2-3

2.7.1 Equipment Level Protection ...............................................................................................2-3 2.7.2 Network Level Protection...................................................................................................2-3 2.7.3 Adjustable MS Bandwidth..................................................................................................2-3 2.7.4 Upgrading MS Bandwidth..................................................................................................2-3 2.7.5 Squelching Function in Multiplex Section .........................................................................2-3

2.8 TCM.............................................................................................................................................2-3 2.9 Network Management Information Interworking........................................................................2-3

2.9.1 Interworking at Physical Layer ..........................................................................................2-3 2.9.2 Interworking at Network Layer ..........................................................................................2-3

3 Hardware................................................................................................................................ 3-3

3.1 Cabinet .........................................................................................................................................3-3 3.2 Subrack ........................................................................................................................................3-3

4 Boards ..................................................................................................................................... 4-3

4.1 Type..............................................................................................................................................4-3 4.2 Slot ...............................................................................................................................................4-3

4.2.1 Slot Layout .........................................................................................................................4-3

Contents OptiX OSN 3500

Technical Manual - System Description

ii Huawei Technologies Proprietary T2-040261-20060320-C-1.50

4.2.2 SDH Processing Board .......................................................................................................4-3 4.2.3 PDH Processing Board .......................................................................................................4-3 4.2.4 Data Processing Board .......................................................................................................4-3

5 Software ................................................................................................................................. 5-3

5.1 Overview......................................................................................................................................5-3 5.2 Intelligent Software......................................................................................................................5-3 5.3 NE Software.................................................................................................................................5-3 5.4 Board Software ............................................................................................................................5-3 5.5 NM System ..................................................................................................................................5-3

6 Data Features ......................................................................................................................... 6-3

6.1 Ethernet ........................................................................................................................................6-3 6.1.1 Function..............................................................................................................................6-3 6.1.2 Application .........................................................................................................................6-3 6.1.3 Protection............................................................................................................................6-3

6.2 RPR Features ...............................................................................................................................6-3 6.2.1 Function..............................................................................................................................6-3 6.2.2 Application .........................................................................................................................6-3 6.2.3 Protection............................................................................................................................6-3

6.3 ATM Features...............................................................................................................................6-3 6.3.1 Functions ............................................................................................................................6-3 6.3.2 Application .........................................................................................................................6-3 6.3.3 Protection............................................................................................................................6-3

6.4 SAN Features ...............................................................................................................................6-3

7 Intelligent Features ............................................................................................................... 7-3

7.1 Topology Auto-Discovery............................................................................................................7-3 7.1.1 Control Topology Auto-Discovery .....................................................................................7-3 7.1.2 Service Topology Auto-Discovery .....................................................................................7-3

7.2 End-to-End Configuration............................................................................................................7-3 7.3 Mesh Networking Protection and Restoration .............................................................................7-3 7.4 Service Level Agreement .............................................................................................................7-3

7.4.1 Diamond Services...............................................................................................................7-3 7.4.2 Gold Services......................................................................................................................7-3 7.4.3 Silver Services ....................................................................................................................7-3 7.4.4 Copper Services..................................................................................................................7-3 7.4.5 Iron Services.......................................................................................................................7-3

7.5 Service Association......................................................................................................................7-3 7.6 Tunnel Services............................................................................................................................7-3 7.7 Service Optimization....................................................................................................................7-3 7.8 Equilibrium of Network Traffic ...................................................................................................7-3

OptiX OSN 3500 Technical Manual - System Description Contents

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7.9 Shared Risk Link Group ..............................................................................................................7-3 7.10 Conversion Between Static Services and ASON Services.........................................................7-3 7.11 Restoring Network-Wide Service Routes to Original Routes....................................................7-3

8 Protection ............................................................................................................................... 8-3

8.1 Equipment Level Protection.........................................................................................................8-3 8.1.1 TPS Protection for Service Processing Boards...................................................................8-3 8.1.2 1+1 Hot Backup for Cross-Connect Unit and Timing Unit................................................8-3 8.1.3 1+1 Hot Backup for the SCC Unit .....................................................................................8-3 8.1.4 1+1 Protection for ATM Boards .........................................................................................8-3 8.1.5 1+1 Hot Backup for the Power Input Unit .........................................................................8-3 8.1.6 Protection for the Wavelength Conversion Unit.................................................................8-3 8.1.7 1:N Protection for the +3.3 V Board Power Supply...........................................................8-3 8.1.8 Intelligent Fans ...................................................................................................................8-3 8.1.9 Abnormality-Specific Service Protection ...........................................................................8-3

8.2 Network Level Protection ............................................................................................................8-3 8.2.1 Basic Networking Modes ...................................................................................................8-3 8.2.2 SDH Trail Protection ..........................................................................................................8-3 8.2.3 SNCP..................................................................................................................................8-3 8.2.4 Protection for Interworking Service on Rings....................................................................8-3 8.2.5 Fiber-Shared Virtual Trail Protection .................................................................................8-3 8.2.6 MS Shared Protection Ring ................................................................................................8-3

9 OAM ....................................................................................................................................... 9-3

9.1 Operation and Maintenance .........................................................................................................9-3 9.2 Administration..............................................................................................................................9-3

10 Technical Specifications .................................................................................................. 10-3

10.1 Interface Type...........................................................................................................................10-3 10.2 Optical Interface Performance .................................................................................................10-3

10.2.1 SDH Optical Interface ....................................................................................................10-3 10.2.2 Ethernet Optical Interface...............................................................................................10-3 10.2.3 ATM Optical Interface....................................................................................................10-3

10.3 Electrical Interface Performance..............................................................................................10-3 10.4 Clock Performance...................................................................................................................10-3

10.4.1 Clock Interface Type ......................................................................................................10-3 10.4.2 Timing and Synchronization Performance .....................................................................10-3

10.5 Transmission Performance.......................................................................................................10-3 10.6 Timeslot Number .....................................................................................................................10-3 10.7 Power Supply Parameters ........................................................................................................10-3 10.8 Power Consumption and Weight of Boards .............................................................................10-3 10.9 Electromagnetic Compatibility ................................................................................................10-3

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10.10 Environmental Specification..................................................................................................10-3 10.11 Environment Requirement .....................................................................................................10-3

10.11.1 Environment for Storage...............................................................................................10-3 10.11.2 Environment for Transportation ...................................................................................10-3 10.11.3 Environment for Operation...........................................................................................10-3

OptiX OSN 3500 Technical Manual - System Description Figures

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Figures

Figure 1-1 Appearance of the OptiX OSN 3500 ...............................................................................1-3

Figure 1-2 Application of the OptiX OSN 3500 in the network .......................................................1-3

Figure 2-1 Access capacity of each slot when using the GXCSA.....................................................2-3

Figure 2-2 Access capacity of each slot when using the EXCSA .....................................................2-3

Figure 2-3 Access capacity of each slot when using the UXCSA/B.................................................2-3

Figure 2-4 Hardware configuration of the primary subrack..............................................................2-3

Figure 2-5 Application of REG.........................................................................................................2-3

Figure 2-6 NM information transparently transmitted by third party equipment .............................2-3

Figure 2-7 NM information of the third party equipment is transparently transmitted.....................2-3

Figure 2-8 NM information transparently transmitted by the third party equipment........................2-3

Figure 2-9 NM information of the third party equipment is transparently transmitted.....................2-3

Figure 2-10 Transparent transmission of NM information by the third party equipment (OSI) .......2-3

Figure 2-11 Transparent transmission of NM information of third party equipment (OSI)..............2-3

Figure 3-1 Appearance of an ETSI cabinet .......................................................................................3-3

Figure 3-2 Structure of an OptiX OSN 3500 subrack .......................................................................3-3

Figure 4-1 Functional diagram of the OptiX OSN 3500...................................................................4-3

Figure 4-2 Slot layout of the OptiX OSN 3500.................................................................................4-3

Figure 5-1 System software structure................................................................................................5-3

Figure 5-2 Relationship between control plane and transmission plane ...........................................5-3

Figure 6-1 The EPL service based on port ........................................................................................6-3

Figure 6-2 The EPL service based on port+VLAN...........................................................................6-3

Figure 6-3 The EVPL service with MPLS label ...............................................................................6-3

Figure 6-4 Layer 2 switching of Ethernet service .............................................................................6-3

Figure 6-5 Application of EVPLAN service .....................................................................................6-3

Figure 6-6 LCAS adjusts bandwidth dynamically ............................................................................6-3

Figure 6-7 LCAS protects the virtual concatenation group ..............................................................6-3

Figures OptiX OSN 3500


vi Huawei Technologies Proprietary T2-040261-20060320-C-1.50

Figure 6-8 RPR ring..........................................................................................................................6-3

Figure 6-9 Spatial reuse ....................................................................................................................6-3

Figure 6-10 Fairness algorithm when the weight is 1 .......................................................................6-3

Figure 6-11 Fairness algorithm when the weights are different ........................................................6-3

Figure 6-12 EVPL accessing, forwarding and stripping ...................................................................6-3

Figure 6-13 EVPL service convergence............................................................................................6-3

Figure 6-14 EVPLAN service...........................................................................................................6-3

Figure 6-15 Wrapping protection ......................................................................................................6-3

Figure 6-16 Steering protection.........................................................................................................6-3

Figure 6-17 Wrapping+steering protection .......................................................................................6-3

Figure 6-18 Application of Band exclusive ATM Services...............................................................6-3

Figure 6-19 VP/VC-Ring ..................................................................................................................6-3

Figure 7-1 Control topology auto-discovery.....................................................................................7-3

Figure 7-2 Service topology auto-discovery .....................................................................................7-3

Figure 7-3 End-to-end service configuration ....................................................................................7-3

Figure 7-4 Trail restoration ...............................................................................................................7-3

Figure 7-5 A diamond service ...........................................................................................................7-3

Figure 7-6 A gold service ..................................................................................................................7-3

Figure 7-7 A silver service ................................................................................................................7-3

Figure 7-8 Association services.........................................................................................................7-3

Figure 7-9 Tunnel services ................................................................................................................7-3

Figure 7-10 Traffic equilibrium.........................................................................................................7-3

Figure 8-1 End to end conversion of a unprotected trail to a SNCP-protected trail .........................8-3

Figure 8-2 Fiber-shared virtual trail protection.................................................................................8-3

Figure 8-3 MS-shared protection ring...............................................................................................8-3

Figure 8-4 Two lower-speed lines share one higher-speed line ........................................................8-3

Figure 8-5 Sharing protection under the lines with the same speed..................................................8-3

OptiX OSN 3500 Technical Manual - System Description Tables

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Tables

Table 2-1 Cross-Connect capacity.....................................................................................................2-3

Table 2-2 Maximum service access capacity ....................................................................................2-3

Table 2-3 The service interfaces of the OptiX OSN 3500.................................................................2-3

Table 2-4 The administration and auxiliary interfaces of the OptiX OSN 3500 ...............................2-3

Table 2-5 Configuration of the extended subrack .............................................................................2-3

Table 2-6 Boards supporting REG ....................................................................................................2-3

Table 2-7 REG optical interfaces ......................................................................................................2-3

Table 2-8 Equipment level protection ...............................................................................................2-3

Table 2-9 The maximum number of MS rings protection supported by the OptiX OSN 3500.........2-3

Table 3-1 Technical parameters of an ETSI cabinet ..........................................................................3-3

Table 4-1 Constituent boards and functions of units .........................................................................4-3

Table 4-2 MSP paired slots of the OptiX OSN 3500.........................................................................4-3

Table 4-3 Relationship between the slots for interface boards and those for processing boards.......4-3

Table 4-4 SDH processing boards and their available slots ..............................................................4-3

Table 4-5 The SDH interface boards and their available slots ..........................................................4-3

Table 4-6 The PDH processing boards and their available slots .......................................................4-3

Table 4-7 The PDH interface boards and their available slots ..........................................................4-3

Table 4-8 The data processing boards and their available slots.........................................................4-3

Table 4-9 The Ethernet interface boards and their available slots.....................................................4-3

Table 6-1 The function list of EFS4, EFS0 and EGS2 ......................................................................6-3

Table 6-2 The function list of EGT2 and EFT8.................................................................................6-3

Table 6-3 RPR board functions .........................................................................................................6-3

Table 6-4 RPR service class ..............................................................................................................6-3

Table 6-5 Functions of the ADL4 and ADQ1....................................................................................6-3

Table 6-6 Functions of the IDL4 and IDQ1 ......................................................................................6-3

Table 6-7 Supportable ATM service and traffic types of the OptiX OSN 3500 ................................6-3

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viii Huawei Technologies Proprietary T2-040261-20060320-C-1.50

Table 6-8 Classification of ATM protection ......................................................................................6-3

Table 6-9 Functions of the MST4 board............................................................................................6-3

Table 6-10 Services and rates provided by the MST4.......................................................................6-3

Table 7-1 Service level ......................................................................................................................7-3

Table 7-2 Description of multiplex section using by ASON service.................................................7-3

Table 8-1 Basic networking modes ...................................................................................................8-3

Table 10-1 Interface types ...............................................................................................................10-3

Table 10-2 Performance of the STM-1 optical interface.................................................................10-3

Table 10-3 Performance of the STM-4 optical interface.................................................................10-3

Table 10-4 Performance of the STM-16 optical interface...............................................................10-3

Table 10-5 Performance of the STM-16 optical interface (FEC) ....................................................10-3

Table 10-6 Performance of the STM-64 optical interface...............................................................10-3

Table 10-7 Performance of the STM-16 and STM-64 fixed wavelength optical interface .............10-3

Table 10-8 The central wavelength and frequency of the STM-16 and STM-64 optical interfaces10-3

Table 10-9 Specifications of Ethernet optical interface...................................................................10-3

Table 10-10 Specifications of ATM optical interface......................................................................10-3

Table 10-11 Performance of the PDH electrical interface ...............................................................10-3

Table 10-12 Clock features..............................................................................................................10-3

Table 10-13 Timing and synchronization performance...................................................................10-3

Table 10-14 Transmission performance ..........................................................................................10-3

Table 10-15 Numbering of TU-12s in a VC-4 (type I)....................................................................10-3

Table 10-16 Numbering of TU-12s in a VC-4 (type II, ITU-T G.707)............................................10-3

Table 10-17 Power supply parameters of the OptiX OSN 3500 .....................................................10-3

Table 10-18 Power consumption of boards .....................................................................................10-3

Table 10-19 EMC test specifications...............................................................................................10-3

Table 10-20 Environmental specifications ......................................................................................10-3

Table 10-21 Climate environment for storage.................................................................................10-3

Table 10-22 Density for mechanical active substances ...................................................................10-3

Table 10-23 Density for chemical active substances.......................................................................10-3

Table 10-24 Requirements for mechanical stress ............................................................................10-3

Table 10-25 Climate environment for transportation ......................................................................10-3


OptiX OSN 3500 Technical Manual - System Description Tables

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Table 10-29 Requirements for temperature and humidity...............................................................10-3

Table 10-30 Other climate requirements .........................................................................................10-3




OptiX OSN 3500 Technical Manual - System Description 1 Network Application

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1 Network Application

This chapter describes the application of the OptiX OSN 3500 in a transmission network.

The OptiX OSN 3500 is the next generation equipment developed by Huawei Technologies Co., Ltd (hereinafter referred to as Huawei). It integrates the following technologies:

n Synchronous digital hierarchy (SDH) n Wavelength division multiplexing (WDM) n Ethernet n Asynchronous transfer mode (ATM) n Plesiochronous digital hierarchy (PDH) n Automatically switched optical network (ASON)

The OptiX OSN 3500 provides a platform for data and voice service transmission. Figure 1-1 shows the appearance of the OptiX OSN 3500.

1 Network Application OptiX OSN 3500


1-2 Huawei Technologies Proprietary T2-040261-20060320-C-1.50

Figure 1-1 Appearance of the OptiX OSN 3500

Figure 1-2 shows how the OptiX OSN 3500 is applied in the transmission network. The OptiX OSN 3500 is mainly used at the convergence layer and the backbone layer of the metropolitan area network (MAN). It interconnects with the following equipments:

n OptiX OSN 9500 n OptiX OSN 7500 n OptiX OSN 2500 n OptiX OSN 1500

OptiX OSN 3500 Technical Manual - System Description 1 Network Application


OptiX OSN 9500

Backbone layer

OptiX OSN 3500 OptiX OSN 7500

OptiX OSN 3500OptiX OSN 2500

OptiX OSN 2500OptiX OSN 1500

Convergence layer

Access layer

GSM/CDMA/WCDMA Ethernet SANPSTN ATM. . .

Figure 1-2 Application of the OptiX OSN 3500 in the network

OptiX OSN 3500 Technical Manual - System Description 2 Functions


2 Functions

This chapter introduces the functions of the OptiX OSN 3500 in terms of:

n Capacity n Interface n Built-in WDM Technology n Extended Subrack n REG n Clock n Protection n TCM n Network Management Information Interworking

2.1 Capacity 2.1.1 Cross-Connect Capacity

The OptiX OSN 3500 offers the following cross-connect boards: GXCSA, EXCSA, UXCSA/UXCSB and XCE. Table 2-1 shows their cross-connect capacity.

Table 2-1 Cross-Connect capacity

Board Higher order cross-connect capacity

Lower order cross-connect capacity

Access capacity

Remarks

GXCSA 40 Gbit/S (256 x 256 VC-4)

5 Gbit/s (32 x 32 VC-4)

35 Gbit/s (224 x 224 VC-4)

Applies to the primary subrack and does not support extended subrack.

EXCSA 80 Gbit/s (512 x 512 VC-4)

5 Gbit/s (32 x 32 VC-4)

58.75 Gbit/s (376 x 376 VC-4)

Applies to the primary subrack and does not support extended subrack.

2 Functions OptiX OSN 3500



Board Higher order cross-connect capacity

Lower order cross-connect capacity

Access capacity

Remarks

UXCSA 80 Gbit/s (512 x 512 VC-4)

20 Gbit/s (128 x 128 VC-4)

58.75 Gbit/s (376 x 376 VC-4)

Applies to the primary subrack and dose not support extended subrack.

UXCSB 80 Gbit/s (512 x 512 VC-4)

20 Gbit/s (128 x 128 VC-4)

60 Gbit/s (384 x 384 VC-4)

Applies to the primary subrack and supports a 1.25 Gbit/s extended subrack. (Note)

XCE - 1.25 Gbit/s (8 x 8 VC-4)

1.25 Gbit/s (8 x 8 VC-4)

Applies to the extended subrack.

2.1.2 Access Capacity of Slots With different cross-connect boards, the OptiX OSN 3500 provides different access capacity. See Figure 2-1, Figure 2-2 and Figure 2-3.

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

SLOT7

SLOT8

SLOT9

SLOT10

SLOT11

SLOT12

SLOT13

SLOT14

SLOT15

SLOT16

SLOT17

SLOT18

GX

CSA

GXC

SA

2.5G

bit/s

622M

bit/s

2.5G

bit/s

10G

bit/s

10G

bit/s

622M

bit/s

622M

bit/s

622M

bit/s

622M

bit/s

622M

bit/s

622M

bit/s

622M

bit/s

Fiber Routing

FAN FAN FAN

2.5G

bit/s

2.5G

bit/s

GSC

CG

SC

C

Figure 2-1 Access capacity of each slot when using the GXCSA



SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

SLOT7

SLOT8

SLOT9

SLOT10

SLOT11

SLOT12

SLOT13

SLOT14

SLOT15

SLOT16

S17

SLOT18

or

EXC

SA

EXC

SA

2.5G

bit/s

2.5G

bit/s

2.5G

bit/s

10G

bit/s

10G

bit/s

1.25

Gbi

t/s1.

25G

bit/s

1.25

Gbi

t/s1.

25G

bit/s

1.25

Gbi

t/s1.

25G

bit/s

2.5G

bit/s

10G

bit/s

10G

bit/s

1.25

Gbi

t/s

Fiber routing

FAN FAN FAN

GSC

CG

SC

C

Figure 2-2 Access capacity of each slot when using the EXCSA

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

SLOT7

SLOT8

SLOT9

SLOT10

SLOT11

SLOT12

SLOT13

SLOT14

SLOT15

SLOT16

S17

SLOT18

or

UX

CSA

/B

UX

CSA

/B

2.5G

bit/s

2.5G

bit/s

2.5G

bit/s

10G

bit/s

10G

bit/s

1.25

Gbi

t/s1.

25G

bit/s

1.25

Gbi

t/s1.

25G

bit/s

1.25

Gbi

t/s1.

25G

bit/s

2.5G

bit/s

10G

bit/s

10G

bit/s

1.25

Gbi

t/s

Fibre routing

FAN FAN FAN

GS

CC

GSC

C

Figure 2-3 Access capacity of each slot when using the UXCSA/B

2.1.3 Service Access Capability Table 2-2 lists the maximum capacity supported for each service type.

Table 2-2 Maximum service access capacity

Service type Maximum access ports of a single subrack

STM-64 standard or concatenated service 4



STM-1 standard service 148

STM-1 (electrical) service 68

E4 service 32

E3/T3 service 69




Service type Maximum access ports of a single subrack

E1/T1 service 504

Fast Ethernet (FE) service 164

Gigabit Ethernet (GE) service 28

STM-4 ATM service 15

STM-1 ATM service 60

ESCON/FC50 44

FC100/FICON 22

FC200 8

DVB-ASI 44

2.2 Interface 2.2.1 Service Interface

Table 2-3 shows the service interfaces.

Table 2-3 The service interfaces of the OptiX OSN 3500

Interface Description

SDH service interface

75 ohm STM-1 electrical interface with SMB connector STM-1 optical interfaces: I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 STM-4 optical interfaces: I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 STM-16 optical interfaces: I-16, S-16.1, L-16.1, L-16.2, L-16.2Je, V-16.2Je, U-16.2Je STM-16 optical interfaces (out-of-band FEC): Ue-16.2c, Ue-16.2d, Ue-16.2f STM-16 optical interfaces: support fixed wavelength output, hence can directly interconnect with WDM equipment. STM-64 optical interfaces: I-64.2, S-64.2b, L-64.2b, Le-64.2, Ls-64.2, V-64.2b STM-64 optical interfaces: support fixed wavelength output, hence can directly interconnect with WDM equipment.

PDH service interface

75/120 ohm E1 electrical interface: DB44 connector 100 ohm T1 electrical interface: DB44 connector 75 ohm E3, T3 and E4 electrical interfaces: SMB connector




Ethernet service interface

10/100Base-TX, 100Base-FX, 1000Base-SX, 1000Base-LX, 1000Base-ZX

ATM service interface

STM-1 optical interface: I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 STM-4 optical interface: S-4.1, L-4.1, L-4.2, Ve-4.2 E3 interface: accessed by the PD3/PL3 board IMA E1 interface: accessed by the PQ1/PQM board

Storage area network (SAN) service interface

FC50, FC100/FICON, FC200, ESCON

Video service interface

DVB-ASI

& Note Ue-16.2c, Ue-16.2d, Ue-16.2f, L-16.2Je, V-16.2Je, U-16.2Je, Le-64.2, Ls-64.2, Ve-1.2, Ve-4.2 are technical specifications defined by Huawei.

2.2.2 Administration and Auxiliary Interfaces The administration and auxiliary interfaces provided by the OptiX OSN 3500 are shown in Table 2-4.

Table 2-4 The administration and auxiliary interfaces of the OptiX OSN 3500


Administration interface

One RS-232 remote maintenance interface (OAM) Four broadcast data interfaces (S1-S4) One 64 kbit/s codirectional data interface (F1) One Ethernet network management (NM) interface (ETH) One administration serial interface (F&f) One extended subrack management interface (EXT)

Orderwire interface

One orderwire phone interface (PHONE) Two network-to-network voice interfaces (V1, V2)

Clock interface Two 75 ohm clock input interfaces (2048 kbit/s or 2048 kHz) Two 75 ohm clock output interfaces (2048 kbit/s or 2048 kHz) Two 120 ohm clock input interfaces (2048 kbit/s or 2048 kHz) Two 120 ohm clock output interfaces (2048 kbit/s or 2048 kHz)





Alarm interface Sixteen alarm input interfaces Four alarm output interfaces Four cabinet alarm indicator output interfaces Cabinet alarm indicator concatenation interface Alarm concatenation interface

2.3 Built-in WDM Technology The OptiX OSN 3500 provides a two-channel optical add/drop multiplexing board MR2A and an arbitrary bit rate wavelength conversion board LWX to implement built-in WDM function. There are two types of MR2 boards: the MR2A board and the MR2C board. They are identical in function but are installed in different slots. These boards have the following characteristics.

n The MR2 board adds/drops two adjacent standard wavelengths compliant with ITU-T G.692 (DWDM), with signals transmitted transparently and operating wavelength ranging from 1535.82 nm to 1560.61 nm.

n The MR2 board serves as an OTM station adding/dropping two channels of signals.

n Two MR2 boards connected in serial can form an OTM station adding/dropping four channels.

n The MR2 board can work with the LWX to form an OADM station adding/dropping two channels of signals.

n The LWX board converts client-side signals into standard wavelength signals as stated in ITU-T G.692 (DWDM) and transmit the signals transparently.

n The LWX board provides 3R function to client-side uplink/downlink signals (at the rate of 10 Mbit/s–2.7 Gbit/s), performs clock recovery and monitors its rate.

n Two types of LWX boards are available: single-fed single receiving and dual-fed signal selection.

n The dual-fed signal selection LWX board supports intra-board protection, enabling optical channel protection with one board. The protection switching time is less than 50ms.

n The single-fed single receiving LWX board supports inter-board protection, that is, 1+1 inter-board hot backup protection. The protection switching time is less than 50ms.



2.4 Extended Subrack The extended subrack of the OptiX OSN 3500 can access 504 E1/T1 services and provide E1/T1 services with 1: N (N≤8) TPS protection.

Each OptiX OSN 3500 can support only one extended subrack. The extended subrack configuration is shown in Table 2-5.

Table 2-5 Configuration of the extended subrack

Subrack Board

Primary subrack Extended subrack

Cross-connect and synchronous timing board

The UXCSB board is required. 1+1 hot backup is recommended.

The XCE board is required. 1+1 hot backup is recommended.

SCC The N1GSCC board is mandatory, 1+1 hot backup is recommended.

It is not required.

Service processing board

Service processing boards are configured according to the actual demands.

Support PQ1, PQM, D75S, D12S, D12B, MR2A and MR2C.

PIU It is required. 1+1 hot backup is recommended.

It is required. 1+1 hot backup is recommended.

AUX It is required. It is required.

FAN It is required. It is required.

The UXCSB board and the XCE board are connected by two cables to achieve 1:1 protection. The "EXT" interface on the AUX board of the primary subrack is connected to the "EXT" interface of the extended subrack to transmit the network management information. Figure 2-4 shows the connection between the primary subrack and the extended subrack.




1920

1 2 3 4 5 6 7 8 9 10 1112

FAN FAN FAN

PIU

PIU

UXC

SB

UXC

SB

AU

XG

SCC

EXB

EXA

EXB

EXA

EXT

GSC

C

FAN FAN FAN

PIU

PIU

XCE

XCE

AU

X

EXB

EXA

EXB

EXA

EXT

Primary subrack Extended subrack

13 14 1516 17 18 51 60 6162 63 64 6566 67 68

212223242526 27 28 2930313233343536 37 6970717273747576 77 78 7980818283848586 87

5655545352 57 58 59

Figure 2-4 Hardware configuration of the primary subrack



2.5 REG

& Note For details of the OptiX OSN 2500 REG, see OptiX OSN 3500 Intelligent Optical Transmission System Technical Manual Networking and Application Manual. The OptiX OSN 3500 can be also used as a REG.

The OptiX OSN 3500 supports REG application as shown in Figure 2-5.

OUT

IN

OUT

IN

REG

SL64 SL64IN

OUT

SL64IN

OUT

SL64

OptiX OSN 3500OUT

IN

SL16 SL16

IN

OUT

SL16

IN

OUT

SL16

PQ1

ADM

OSN3500

OSN3500

OSN3500

OSN3500

OUT

IN

Figure 2-5 Application of REG

For the boards that support REG, see Table 2-6. For optical interface types of these boards, see Table 2-7.

Table 2-6 Boards supporting REG

Board Slots (40 Gbit/s cross connect capacity)

Slots (80 Gbit/s cross connect capacity)

Description

SL64 8, 11 7–8,11–12 With REG mode enabled, the board only processes frame header, regeneration section overhead.

SF16 6–8, 11–13 5–8, 11–14 With REG mode enabled, the board only processes frame header, regeneration section overhead and FEC overhead.




Board Slots (40 Gbit/s cross connect capacity)


Description

SL16 6–8, 11–13 5–8, 11–14 With REG mode enabled, the board only processes frame header, regeneration section overhead.

Table 2-7 REG optical interfaces

Board Optical interface type

SL64 I-64.2, S-64.2b, L-64.2b, Le-64.2, Ls-64.2, V-64.2b

SF16 Ue-16.2c, Ue-16.2d, Ue-16.2f

SL16 I-16, S-16.1, L-16.1, L-16.2, L-16.2Je, V-16.2Je, U-16.2Je

2.6 Clock The OptiX OSN 3500 supports clock functions below.

n Supports SSM (Synchronization Status Message) protocol. n Supports tributary retiming. n Supports two 75 ohm external clock interfaces for input and output (2048

kbit/s or 2048 kHz). n Supports two 120 ohm external clock interfaces for input and output (2048

kbit/s or 2048 kHz). n When tracing tributary clock sources, the network element can only tracing

the first port (corresponding to the first physical port) or the second port (corresponding to the ninth physical port) on the T2000 of PQ1 or PQM.

n When tracing tributary clock sources, the network element can only tracing the first port (corresponding to the first physical port ) or the second port (corresponding to the fourth physical port) on the T2000 of PD3

n When tracing tributary clock sources, the network element can only tracing the first port (corresponding to the first physical port ) on the T2000 of PL3



2.7 Protection 2.7.1 Equipment Level Protection

Table 2-8 shows the equipment level protection provided by the OptiX OSN 3500.

Table 2-8 Equipment level protection

Items protected Protection scheme

E1 processing board 1:N (N≤8) tributary protection switching (TPS)

E1/T1 processing board 1:N (N≤8) TPS

E3/T3 processing board 1:N (N≤3) TPS

E4/STM-1 processing board 1:N (N≤3) TPS

STM-1 electrical processing board 1:N (N≤3) TPS

Ethernet processing board (N2EFS0) 1:1 TPS

ATM processing board 1+1 hot backup

Cross-connect & timing unit 1+1 hot backup

SCC unit 1+1 hot backup

–48 V power interface board 1+1 hot backup

Arbitrary bit rate wavelength conversion board LWX

Intra-board protection and inter-board protection (1+1)

+3.3 V board power supply 1:N centralized backup

Note: The OptiX OSN 3500 supports three TPS protection groups of different types at the same time.

2.7.2 Network Level Protection The OptiX OSN 3500 Multi Add/Drop Multiplexer (MADM) system is capable of processing up to 40 Embedded Control Channels (ECC).

The OptiX OSN 3500 supports the following protection.

n Two-Fibre multiplex section protection (MSP) ring n Four-Fibre multiplex section protection (MSP) ring n Linear MSP n MS-shared protection ring




n Sub-Network connection protection (SNCP)

Table 2-9 shows the MS protection ring types supported by the OptiX OSN 3500 and the maximum number of each type.

Table 2-9 The maximum number of MS rings protection supported by the OptiX OSN 3500

Protection scheme Max. number of MS rings protection supported

STM-64 four-fiber MS ring protection 1

STM-64 two-fiber MS ring protection 2

STM-16 four-fiber MS ring protection 2

STM-16 two-fiber MS ring protection 4

2.7.3 Adjustable MS Bandwidth "MS bandwidth" refers to the number of VC-4s on an MSP ring or the number of VC-4s on a linear MSP chain.

The OptiX OSN 3500 supports adjustable MS bandwidth without interrupting services. For an STM-16 two-fibre bidirectional MSP ring, the MS bandwidth is adjusted between one and eight VC-4s. For an STM-64 two-fibre bidirectional MSP ring, the MS bandwidth is adjusted between one and thirty-two VC-4s.

2.7.4 Upgrading MS Bandwidth The OptiX OSN 3500 supports upgrading MS bandwidth by replacing it with the board of higher bit rate without interrupting services. For example, upgrading the STM-16 two-fibre bidirectional MSP ring to the STM-64 two-fibre bidirectional MSP ring.

2.7.5 Squelching Function in Multiplex Section The OptiX OSN 3500 supports the function of squelching misconnected VC-4 traffic.

Each protection time slot in a multiplex section protection ring is shared by the traffic from different segments or occupied by extra traffic. With no extra traffic in the ring, and under the situation that a certain node is isolated because of multiple points’ failure, the traffic from different segments of the same time slot may contend for the same protection channel time slot. This brings misconnection of traffic. With extra traffic in the ring, and even under the situation of a single node’s failure, the traffic from the working channel may also contend for the time slot of protection channel carrying extra traffic. This also brings misconnection.

To prevent misconnection, every node of the OptiX OSN 3500 has a detailed connection table. Every node knows the source and sink point of each VC-12,



VC-3, or VC-4 (VC-12 or VC-3 connections must have the same source and sink). Such information helps APS protocol to tell possible misconnections in advance. Traffic with the potentiality of misconnection is discarded through inserting TU_AIS or AU_AIS.

The OptiX OSN 3500 supports the squelching of misconnected VC-12, VC-3 and VC-4 traffic in 2-fiber or 4-fiber MS ring protection. VC-12 or VC-3 connections must have the same source and sink.

2.8 TCM Tandem Connection Monitor (TCM) is a method monitoring bit errors. If a VC-4 passes through several networks, the bit errors of each section can be monitored through TCM.

The N2SL1, N2SLQ1, N2SL4, N2SLD4, N2SLQ4, N2SL16 and N2SL64 boards support TCM at higher level.

2.9 Network Management Information Interworking 2.9.1 Interworking at Physical Layer

NM Information Transparently Transmitted by Third Party Equipment

The DCC consists of two parts:

n D1–D3 bytes, forming a 192 kbit/s channel. n D4–D12 bytes, forming a 576 kbit/s channel.

Currently, only the D1–D3 bytes are used. The D4–D12 bytes are reserved for higher management requirements.

When there is a piece of third party equipment between the OptiX OSN 3500 systems, the bytes D4–D12 will be used by the third party equipment to transmit the NM information, as shown in Figure 2-6.




Third partyequipment


D1-D3 D1-D3

Transparenttransmission

Figure 2-6 NM information transparently transmitted by third party equipment

The NM Information of the Third Party Equipment is Transparently Transmitted

The NM information of the third party equipment is transmitted by bytes D4–D12 of the OptiX OSN 3500, as shown in Figure 2-7.



D1-D3 D1-D3Transparenttransmission

Figure 2-7 NM information of the third party equipment is transparently transmitted

2.9.2 Interworking at Network Layer

IP Over DCC

The scheme of IP over DCC uses the network layer protocol for NM information transmission.

IP over DCC has two networking topologies as shown in Figure 2-8 and Figure 2-9.





IP over DCC

Figure 2-8 NM information transparently transmitted by the third party equipment



IP over DCC



Figure 2-9 NM information of the third party equipment is transparently transmitted

OSI over DCC (TP4)

OSI over DCC adopts standard OSI protocols (also called TP4) to transmit NM information at network layer.

For OSI over DCC, there are two networking modes. They are explained below:

n The NM information of the OptiX OSN 3500 is transparently transmitted by the third party equipment through OSI over DCC, as shown in Figure 2-10.

n The NM information of the third party equipment is transparently transmitted by the OptiX OSN 3500, as shown in Figure 2-11.






OSI Over DCC

OSI protocolstack

OSI protoclstack

OSI protocolstack

Figure 2-10 Transparent transmission of NM information by the third party equipment (OSI)



OSI Over DCC



OSI protocolstack

OSI protocolstack

OSI protocolstack

Figure 2-11 Transparent transmission of NM information of third party equipment (OSI)

OptiX OSN 3500 Technical Manual - System Description 3 Hardware


3 Hardware

This chapter describes the hardware structure of the OptiX OSN 3500. It covers:

n Cabinet n Subrack

3.1 Cabinet The OptiX OSN 3500 can be installed in the ETSI cabinet. Table 3-1 shows the technical parameters of an ETSI cabinet. Figure 3-1 shows the appearance of an ETSI cabinet.

Table 3-1 Technical parameters of an ETSI cabinet

Size (mm) Weight (kg) No. of subrack can be housed

600 (W) x 300 (D) x 2000 (H) 55 1

600 (W) x 600 (D) x 2000 (H) 79 1

600 (W) x 300 (D) x 2200 (H) 60 2

600 (W) x 600 (D) x 2200 (H) 84 2

600 (W) x 300 (D) x 2600 (H) 70 2

600 (W) x 600 (D) x 2600 (H) 94 2

Note: All dimensions are in mm. The following figure shows the directions of the width, the depth and the height.

W

H

D

3 Hardware OptiX OSN 3500



W

H

D

Figure 3-1 Appearance of an ETSI cabinet

OptiX OSN 3500 Technical Manual - System Description 3 Hardware


3.2 Subrack The OptiX OSN 3500 subrack measures 722 mm (H) x 497 mm (W) x 295mm (D). A single empty subrack weighs 23 kg.

The OptiX OSN 3500 is composed of an interface board area, a fan area, a processing board area, and a fiber routing area, as shown in Figure 3-2.

1

2

3

4

W

H

D

1. Interface board area 2. Fan area 3. Processing board area 4. Fiber routing area

Figure 3-2 Structure of an OptiX OSN 3500 subrack

OptiX OSN 3500 Technical Manual - System Description 4 Boards


4 Boards

This chapter introduces the board types of the OptiX OSN 3500, and the slots in which they can be installed. It covers:

n Type n Slot

4.1 Type The OptiX OSN 3500 consists of the following units:

n SDH interface unit n PDH interface unit n Ethernet unit n ATM interface unit n SDH cross-connect matrix unit n Synchronous timing unit n SCC unit n Overhead processing unit n Auxiliary interface unit

Figure 4-1 shows the functional diagram of the OptiX OSN 3500, and Table 4-1 shows the constituent boards and functions of each unit.

4 Boards OptiX OSN 3500



PD

H/E

thernet/ATM

Interface Unit

STM-N Optical Signal

PDH SignalEthernet Signal

ATM Signal

Cross C

onnect M

atrix

SD

H Interface U

nitO

verhead P

rocessingU

nit

Synchronous tim

ing Unit

Auxiliary

Interface Unit

SC

C U

nit

Figure 4-1 Functional diagram of the OptiX OSN 3500

Table 4-1 Constituent boards and functions of units

Unit Constituent board Function

Processing board SL64, SF16, SL16, SLQ4, SLD4, SL4, SLT1, SLQ1, SL1, SEP1,SEP

Interface board EU08, OU08

SDH interface unit

Protection switching board

TSB8, TSB4

Access and process STM-1/STM-4/STM-16/STM-64 optical signals and VC-4-4c/VC-4-16c/VC-4-64c concatenated signals. Access and process STM-1 electrical signals, and conducts TPS protection for them.

Processing board SPQ4, PD3, PL3, PL3A, PQ1, PQM

Interface board MU04, D34S, C34S, D75S, D12S, D12B

PDH interface unit


TSB8, TSB4

Access and process E1, E1/T1, E3/T3 and E4/STM-1 electrical signals, and conducts TPS protection for them.

Processing board EGS2, EGT2, EFS0, EFS4, EFT8

Access and process 1000Base-SX/LX/ZX, 100Base-FX, and10/100Base-TX signals.

Interface board ETS8 (Support TPS), ETF8, EFF8

Ethernet interface unit


TSB8

Access 10/100Base-TX and 100Base-FX Ethernet signal.



Unit Constituent board Function

Processing board EMR0, EGR2 Access and process 1000Base-SX/LX/ZX, 100Base-FX, and10/100Base-TX signals. Support resilient packet ring.

Resilient packet ring unit

Interface board ETF8, EFF8 Access 10/100Base-TX and 100Base-FX Ethernet signal.

ATM interface unit ADL4, ADQ1, IDL4, IDQ1 Access and process STM-4, STM-1, E3 and IMAE1 ATM signals.

SAN interface unit MST4 Access and transparently transmit SAN and video services.

MR2A, MR2C Add/Drop and multiplexes any two adjacent wavelengths.

WDM unit

LWX Implements the wavelength conversion between X-rate client wavelength (10 Mbit/s-2.7 Gbit/s NRZ) and ITU-T G.692 compliant wavelength.

SDH cross-connect matrix unit

Synchronous timing unit

GXCSA, EXCSA, UXCSA, UXCSB, XCE

Implement cross-connect function and provides the equipment with a system clock.

SCC unit

Overhead processing unit

SCC, GSCC Provides system communication and control function, and process the overhead for SDH signals.

Power input unit PIU Access power supply and protect the equipment against abnormal power.

Auxiliary interface unit AUX Provides management and auxiliary interfaces.

Fan unit FAN, FANA Dissipate heat for the system.

Optical booster amplifier board

BA2, BPA, 61COA, 62COA, N1COA

Amplify and pre-amplify the optical power.

Other functional units

Dispersion compensation board

DCU Compensate dispersion for STM-64 optical signals.

Note: XCE is used for extended subrack.




4.2 Slot 4.2.1 Slot Layout

Figure 4-2 shows the slot layout of the OptiX OSN 3500.

S27

S19

S20

S21

S22

S23

S24

S25

S26

S37

S29

S30

S31

S32

S33

S34

S36

S35

S28

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

S13

S14

FAN FAN FAN

S15

S16

S17

S18

PIU

PIU

XCS

XCS

AUX

GSC

C

Figure 4-2 Slot layout of the OptiX OSN 3500

Table 4-2 shows the MSP paired slots of the OptiX OSN 3500.

Table 4-2 MSP paired slots of the OptiX OSN 3500

Cross-connect capacity Paired slots

40 Gbit/s ( 3, 16), ( 4, 15), ( 5, 14), ( 6, 13), ( 7, 12), ( 8, 11)

80 Gbit/s ( 2, 17), ( 3, 16), ( 4, 15), ( 5, 14), ( 6, 13), ( 7, 12), ( 8, 11)

Table 4-3 shows the relationship between the slots for interface boards and those for processing boards.

Table 4-3 Relationship between the slots for interface boards and those for processing boards

Slot for processing boards

Corresponding slot for interface boards

Slot for processing boards

Corresponding slot for interface boards

2 19, 20 3 21, 22

4 23, 24 5 25, 26

13 29, 30 14 31, 32

15 33, 34 16 35, 36



4.2.2 SDH Processing Board Table 4-4 shows the SDH processing boards and their available slots. Table 4-5 shows the SDH interface boards and their available slots.

Table 4-4 SDH processing boards and their available slots

Board Full name Slots (80 Gbit/s cross connect capacity)


Outlet mode

Interface type Connector

SL64 1 x STM-64 optical interface board

7–8, 11–12 8, 11 Led out from the front panel

Support fixed wavelength output and support I-64.2, S-64.2b, L-64.2b, Le-64.2, Ls-64.2, V-64.2b

LC

SF16 1 x STM-16 optical interface board (with FEC)

5–8, 11–14 6–8, 11–13 Led out from the front panel

Support fixed wavelength output and support Ue-16.2c, Ue-16.2d, Ue-16.2f

LC



Support fixed wavelength output and support I-16, S-16.1, L-16.1, L-16.2, L-16.2Je, V-16.2Je , U-16.2Je

LC

SLQ4 4 x STM-4 optical interface board


I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC

SLD4 2 x STM-4 optical interface board


I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC



I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC

SLT1 (Note 1)

12 x STM-1 optical interface board


I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC






Outlet mode


SLQ1 4 x STM-1 optical interface board


I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC



I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC

SEP1 (Note2)

2 x STM-1 electrical processing board


75 ohm STM-1 electrical interface

SMB

SEP (Note2)

8 x STM-1 electrical processing board

2–5, 13–16 2–5, 13–16 Led out from the interface board

S-1.1 optical interface and 75 ohm STM-1 electrical interface

LC, SC and SMB

BA2 Optical booster amplifier board


NA LC

BPA Optical booster & pre-amplifier board


NA LC

DCU Dispersion compensation board


NA LC

61COA Case shaped EDFA optical amplifier unit

External External Led out from the front panel

NA SC

62COA Case shaped Raman amplifier unit


NA SC, E2000





Outlet mode


N1COA Case shaped preamplifier unit


NA SC

Main subrack 1–8, 11–17

MR2A 2-channel optical add/drop multiplexing board Extended

subrack: 51–55, 63–66

1–8, 11–16 Led out from the front panel

NA LC

Main subrack 19–26, 29–36

MR2C 2-channel optical add/drop multiplexing board

Extended subrack: 69–76, 79–86

19–26, 29–36

Led out from the front panel

NA LC

LWX Arbitrary bit rate wavelength conversion unit


NA LC

Note 1: If the OSN 3500 is configured with EXCSA or UXCSA, only eight optical interfaces can be used when N1SLT1 is inserted in any one of slots 1–4 or slots 15–16 and twelve optical interface can be used when inserted in any one of slots 5–8 or slots 11–14. If the OSN 3500 is configured with GXCSA, only four optical interfaces can be used when N1SLT1 is inserted in any one of slots 1–5 or slots 14–16 and twelve optical interface can be used when inserted in any one of slots 6–8 or slots 11–13. Note 2: The N1SEP1 and N1SEP are the same physically. They are used with the interface board when they are configured as "N1SEP" on the T2000, or the signal is directly led out from the front panel when they are configured as "N1SEP1".

& Note One OptiX OSN 3500 subrack can configure two 61COA, N1COA or 62COA.




Table 4-5 The SDH interface boards and their available slots

Board Full name Slots available Interface type

Companion board

EU08 8 x STM-1 electrical interface board

80 Gbit/s cross-connect capacity: 19, 21, 23, 25, 29, 31, 33, 35 40 Gbit/s cross-connect capacity: not supports

SMB Used with the SEP

EU04 4 x STM-1 electrical interface board

19, 21, 23, 25, 29, 31, 33, 35 SMB Used with the SEP

N2OU08



SC Used with the SEP

N1OU08



LC Used with the SEP

TSB8 8 x electrical interface switching & bridging board

19, 35 None Used with the SEP and EU08


19, 35 None Used with the SEP and EU04

4.2.3 PDH Processing Board Table 4-6 shows the PDH processing boards and their available slots. Table 4-7 shows the PDH interface boards and their available slots.

Table 4-6 The PDH processing boards and their available slots

Board Full name Slots available Outlet mode Interface type Connector

SPQ4 4 x E4/STM-1 electrical processing board

2–5, 13–16 Led out from the interface board

75 ohm E4/STM-1 electrical interface

SMB

PD3 6 x E3/T3 processing board


75 ohm E3/T3 electrical interface

SMB

PL3 3 x E3/T3 processing board



SMB

PL3A (Note)

3 x E3/T3 processing board



SMB



Board Full name Slots available Outlet mode Interface type Connector

Main subrack: 1–5, 13–16

PQ1A 63 x E1 processing board


Led out from the interface board

75 ohm E1 interface

DB44


PQ1B 63 x E1 processing board



120 ohm E1 interface

DB44


PQM 63 x T1/E1 processing board



120 ohm E1 interface and 100 ohm T1 interface

DB44

Note: If the cross-connect capacity is 80 Gbit/s, the PL3A can be still inserted in slot 17.

Table 4-7 The PDH interface boards and their available slots


Companion board

MU04 4 x E4/STM-1 mixed electrical interface board

19, 21, 23, 25, 29, 31, 33, 35

SMB Used with SPQ4

D34S 6 x E3/T3 PDH interface switching board

19, 21, 23, 25, 29, 31, 33, 35

SMB Used with PD3

C34S 3 x E3/T3 PDH interface switching board

19, 21, 23, 25, 29, 31, 33, 35

SMB Used with PL3


D75S 32 x 75 ohm E1/T1 PDH interface switching board Extended subrack:

69–76, 79–86

DB44 Used with PQ1


D12S 32 x 120 ohm E1/T1 PDH interface switching board Extended subrack:

69–76, 79–86

DB44 Used with PQ1 or PQM





Companion board


D12B (Note)

32 x E1/T1 PDH interfaces board


DB44 Used with PQ1 or PQM


19, 35 None Used with PL3/PD3/SPQ4 and C34S/D34S/MU04


19, 35 None Used with PL3 /SPQ4 and C34S /MU04

Note: D12B do not support tributary protection switch.

4.2.4 Data Processing Board Table 4-8 shows the data processing boards and their available slots. Table 4-9 shows the data interface boards and their available slots.

& Note The numbers in the bracket behind the slots means the maximum bandwidth of the board after inserted in the corresponding slot.

Table 4-8 The data processing boards and their available slots

Board Full name Slots (80G cross-connect capacity)

Slots (40G cross-connect capacity)

Outlet mode

Interface type

Connector

N1EGS2 2-port Gigabit Ethernet switching processing board with Lanswitch

5–8, 11–14 (1.25 Gbit/s)

6–8, 11–13 (1.25 Gbit/s)

Output from the front panel

1000Base-SX/LX/ZX





Outlet mode

Interface type

Connector

1–4, 15–16 (1.25 Gbit/s)

1–5, 14–16 (622 Mbit/s)

N2EGS2 2-port Gigabit Ethernet switching processing board with Lanswitch

5–8, 11–14 (2.5 Gbit/s)

6–8 11–13 (2.5 Gbit/s)


1000Base-SX/LX/ZX

LC

N1EFS0 8-port Fast Ethernet processing board with Lanswitch

2–5, 13–16 (622 Mbit/s)

2–5, 13–16 (622 Mbit/s)

Output from the interface board

10/100Base-TX, 100Base-FX

RJ-45, LC

2–5, 14–16 (622 Mbit/s)

N2EFS0 8-port Fast Ethernet processing board with Lanswitch

2–5, 13–16 (1.25 Gbit/s)

13 (1.25 Gbit/s)

Output from the interface board


RJ-45, LC

N1EFS4 4-port 10/100 Mbit/s fast Ethernet processing board with Lanswitch

1–8, 11–17 (622 Mbit/s)

1–8, 11–16 (622 Mbit/s)


10/100Base-TX

RJ-45

1–4, 15–16 (1.25 Gbit/s)

1–5, 14–16 (1.25 Gbit/s)

N1EGT2 2-port Gigabit Ethernet transparent transmission board

5–8, 11–14 (2.5 Gbit/s)

6–8, 11–13 (2.5 Gbit/s)


1000Base-SX/LX/ZX

LC

1–5, 14–16 (622 Mbit/s)

8-port 100M Fast Ethernet transparent transmission board(no interface board)

1–6, 13–16 (1.25 Gbit/s)

6, 13 (1.25 Gbit/s)


10/100Base-TX

RJ-45 N1EFT8

16-port 100M Fast Ethernet transparent transmission board(interface board)

2–5, 13–16 (1.25 Gbit/s)

13 (1.25 Gbit/s)

Output from the front panel and interface board


RJ-45, LC






Outlet mode

Interface type

Connector

1–4, 15–16 (1.25 Gbit/s)

1–5, 14–16 (622 Mbit/s)

4 FE + 1 GE Ethernet board with RPR function 5, 6, 13, 14

(2.5 Gbit/s) 6, 13 (2.5 Gbit/s)


10/100Base-TX, 100Base-FX, 1000Base-SX/LX/ZX

RJ-45, LC

2–4, 15–16 (1.25 Gbit/s)

2–5, 14–16 (622 Mbit/s)

N2EMR0

12 FE + 1 GE Ethernet board with RPR function 5, 13, 14

(2.5 Gbit/s) 13 (2.5 Gbit/s)

Output from the front panel and interface board

10/100Base-TX, 100Base-FX, 1000Base-SX/LX/ZX

RJ-45, LC

1–4, 15–16 (1.25 Gbit/s)

1–5, 14–16 (622 Mbit/s)

N2EGR2 2-port GE processing board with RPR function 5–8, 11–14

(2.5 Gbit/s) 6–8, 11–13 (2.5 Gbit/s)


1000Base-SX/LX/ZX

LC

N1ADL4 1 x STM-4 ATM processing board

1–8, 11–17 (1.25 Gbit/s)

6–8, 11–13 (1.25 Gbit/s)


S-4.1, L-4.1, L-4.2, Ve-4.2

LC

N1ADQ1 4 x STM-1 ATM processing board

1–8, 11–17 (1.25 Gbit/s)

6–8, 11–13 (1.25 Gbit/s)


I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC

1–5, 14–16 (622 Mbit/s)

N1IDL4 1 x STM-4 ATM service processing board with IMA

1–8, 11–17 (1.25 Gbit/s)

6–8, 11–13 (1.25 Gbit/s)


S-4.1, L-4.1, L-4.2, Ve-4.2

LC

1–5, 14–16 (622 Mbit/s)

N1IDQ1 4 x STM-1 ATM service processing board with IMA

1–8, 11–17 (1.25 Gbit/s)

6–8, 11–13 (1.25 Gbit/s)


I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC

1–4, 15–16 (1.25 Gbit/s)

1–5, 14–16 (622 Mbit/s)

N1MST4 4 x multi-service (SAN, Video) transparent transmission board

5–8, 11–14 (2.5 Gbit/s)

6–8, 11–13 (2.5 Gbit/s)


None LC



Table 4-9 The Ethernet interface boards and their available slots


Companion board

ETF8 8 x 10/100 Mbit/s Ethernet twisted pair interface board

19, 21, 23, 25, 29, 31, 33, 35

RJ-45 Used with the EFS0, EMR0, EFT8

EFF8 8 x 100 Mbit/s Ethernet optical interface board

19, 21, 23, 25, 29, 31, 33, 35

LC Used with the EFS0, EMR0, EFT8

ETS8 8 x 10/100 Mbit/s Ethernet interface switching board

19, 21, 23, 25, 29, 31, 33, 35

RJ-45 Used with the N2EFS0 and EMR0

TSB8 8 x PDH interface switching & bridging board

19, 35 NA Used with the N2EFS0 and ETS8

OptiX OSN 3500 Technical Manual - System Description 5 Software


5 Software

5.1 Overview The software system of the OptiX OSN 3500 is of a modular structure, as shown in Figure 5-1. The software modules fall into three types: the board software, the NE software and the NM software. The three types of software respectively run on various boards, the SCC board and the NM computer for corresponding functions.

NM software

Board Software

NE Software

Figure 5-1 System software structure

5.2 Intelligent Software The intelligent software is included in the NE software. The intelligent software requires special license, and it can be enabled or disabled independently.

The intelligent software is represented in a control plane which is layered over the transmission plane. The control plane interacts with the transmission plane to realise auto-configuration of service and provide service protection based on user levels. Figure 5-2shows the relationship between the intelligent control plane and transmission plane.

5 Software OptiX OSN 3500



Service routealgorithm

Control plane

Transmissionplane

Interface adaptation

SignallingProtection and

restoration

Configurationmodule

Performancemodule

Securitymodule

Alarmmodule

Resource agent(slave)

Resource agent(master)

Figure 5-2 Relationship between control plane and transmission plane

The transmission plane manages service configuration of the OptiX OSN 3500 and provides SDH-based protection for services. The control plane serves as one client of the transmission plane. Through the interface adaptation mechanism, the resource agents of the control plane and the transmission plane interact with each other to get the state of resource allocation and implement function provisioning of the NE.



5.3 NE Software The NE software manages, monitors and controls the operation of the boards of an NE. Through the NE software, the communication unit between the NM system and boards, the NM system controls and manages NEs. According to ITU-T M.3010, the NE software belongs to the NE management layer in the telecommunication management network, implementing the functions including NE functions, some of coordination functions and operating system functions of the network element layer. The data communication function implements the communication between the NE and other equipment (including coordinated equipment, NM system, and other NEs).

n Real-time multi-task operating system

The function of the real-time multi-task operating system of the OptiX OSN 3500 NE software is to manage public resources and provide support for the executive program. It provides an executive environment unrelated to processor hardware by segregating the application from the processor.

n Network side (NS) module

The NS module exits between the communication module and equipment management module. It converts the data format between the user operation side on the application layer and the NE equipment management layer, and provides security control for the NE layer. It can be divided into three sub-modules functionally:

− Qx interface module − Command line interface module − Security management module.

n Equipment administration module (AM)

The equipment AM is the kernel of the NE software for NE management. It includes Manager and Agent. Administrator can send network management operation commands and receive events. Agent can respond to the network management operation commands sent by the network administrator, implement operations to the managed object and submit events according to status change of the managed object.

The equipment AM includes configuration management module, performance management module, alarm management module and MSP switching management module.

n Communication module

This module fulfills the message communication function (MCF) of the functional blocks of the transmission network equipment.

Through the hardware interface provided by the GSCC board, the communication module transmits the OAM&P information and exchanges management information between the NM system and NEs, and between NEs themselves. It

5 Software OptiX OSN 3500



consists of network communication module, serial communication module and ECC communication module.

n Database management module

This module is an organic component of the NE software, composed of database and management system. Database comprises several sub databases, including network database, alarm database, performance database and equipment database. The management system manages and accesses the data in the database.

5.4 Board Software The board software runs on each board, managing, monitoring and controlling the operation of the board. It receives the command issued from the NE software and reports the board status to the NE software through performance events and alarm.

The specific functions include:

n Alarm management n Performance management n Configuration management n Communication management

It directly controls the functional circuits in corresponding boards and implements ITU-T compliant specific functions of the NE.

The board software can be classified into the following types:

n Line software or tributary software n Cross-connect software n Clock software n Orderwire software.

5.5 NM System The NM system implements a unified management over the optical transmission network, and maintains all ION, SDH, Metro, DWDM NE equipment in the network. In compliance with ITU-T Recommendation, it is a network management system integrating standard management information model and object-oriented management technology. It exchanges information with NE software through the communication module to monitor and manage the network equipment.

The NM software runs on a workstation or PC, managing the equipment and the transmission network to help to operate, maintain and manage the transmission equipment. The management functions of the NM software include:

n Alarm management: collect, prompt, filter, browse, acknowledge, check, clear, and statistics in real time; fulfill alarm insertion, alarm correlation analysis and fault diagnosis.



n Performance management: set performance monitoring; browse, analyze and print performance data; forecast medium-term and long-term performance; and reset performance register.

n Configuration management: configure and manage interfaces, clocks, services, trails, subnets and time.

n Security management: NM user management, NE user management, NE login management, NE login lockout, NE setting lockout and local craft terminal (LCT) access control of the equipment.

n Maintenance management: provide loopback, board resetting, automatic laser shutdown (ALS) and optical fiber power detection, and collect equipment data to help the maintenance personnel in troubleshooting.

OptiX OSN 3500 Technical Manual - System Description 6 Data Features


6 Data Features

This chapter introduces the data features of the OptiX OSN 3500. It covers:

n Ethernet n RPR n ATM n SAN

6.1 Ethernet This section introduces the Ethernet features of the OptiX OSN 3500 in terms of function, application and protection.

6.1.1 Function The OptiX OSN 3500 enables the Ethernet boards EFS4, EFS0, EGS2, EFT8 and EGT2 to meet different Ethernet service requirements. Table 6-1 and Table 6-2 list the functions of these boards.

Table 6-1 The function list of EFS4, EFS0 and EGS2

Function N1EFS4 N1EFS0 N2EFS0 N1EGS2 N2EGS2

Number of ports 4 FE 8 FE 8 FE 2 GE 2 GE

Interface type 10Base-T 100Base-TX

10Base-T, 100Base-TX, 100Base-FX


1000Base-SX, 1000Base-LX, 1000Base-ZX

1000Base-SX, 1000Base-LX, 1000Base-ZX

Used with interface board

None ETF8, EFF8 ETS8 (cooperating with TSB8 to realize 1:1 TPS), ETF8, EFF8

None None

Service frame format Ethernet II, IEEE 802.3, IEEE 802.1 q/p

6 Data Features OptiX OSN 3500




JUMBO frame Supported, 9600 bytes

Maximum uplink bandwidth

4 VC-4 4 VC-4 8 VC-4 8VC-4 16VC-4

Mapping granule VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

Number of VCTRUNKs

12 12 24 24 48

Ethernet private line (EPL)

Supported Supported Supported Supported Supported

Ethernet virtual private line (EVPL)

Supported Supported Supported Not supported Supported

Ethernet private LAN (EPLAN)


Ethernet virtual private LAN (EVPLAN)


Static MPLS label Supports MartinioE label

Supports MartinioE label


Not supported Supports MartinioE label

Stack VLAN Supported Supported Supported Not supported Supported

VLAN IEEE 802.1q/p

Spanning tree protocol (STP)


Rapid spanning tree protocol (RSTP)


Multicast (IGMP Snooping)


Encapsulation Generic framing procedure (GFP-F), compliant with ITU-T G.7041

LCAS (Link Capacity Adjustment Scheme)

Supported, compliant with ITU-T G.7042



Not supported Supported, compliant with ITU-T G.7042




CAR Based on port or port + VLAN with the granularity of 64 kbit/s

Based on port, port + VLAN, or port + VLAN + Priority with the granularity of 64 kbit/s

Based on port or port + VLAN with the granularity of 64 kbit/s

Based on port, port + VLAN, or port + VLAN + Priority with the granularity of 64 kbit/s

Link state pass through (LPT)


Port aggregation (within the board)

Not supported Not supported Supported Not supported Supported

Flow control Supported, compliant with IEEE802.3X

QoS Traffic classification

N1EFS4, N1EFS0 and N1EGS2 support PORT, PORT+VLAN ID, PORT+VLAN PRI based traffic classification. N2EFS0 and N2EGS2 support PORT, PORT+VLAN ID, PORT+VLAN ID+VLAN PRI based traffic classification.

Test frame Supported Supported Supported Supported Supported

Ethernet performance monitoring


RMON Supported Supported Supported Supported Supported

Table 6-2 The function list of EGT2 and EFT8

Function N1EGT2 N1EFT8

Number of ports 2 x GE 16 x FE

Interface type 1000Base-SX, 1000Base-LX, 1000Base-ZX


Used with interface board

None Supports 8 x FE if not used with the interface board. Supports 16 x FE if used with interface boards N1ETF8 and EFF8.

Service frame format Ethernet II, IEEE 802.3, IEEE 802.1q TAG


Uplink bandwidth 16 VC-4 8 VC-4

Mapping granule VC-3, VC-4, VC-3-xv (x≤24), VC-4-xv (x≤8)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤3)




Function N1EGT2 N1EFT8

Number of VCTRUNKs

2 16

Ethernet service type Supports EPL.

Static MPLS label Not Supported

VLAN Transparent transmission

Encapsulation GFP-F, LAPS, HDLC

LPT Not Supported Not Supported

LCAS ITU-T G.7042

Flow control IEEE 802.3X

Test frame Supported Supported

Ethernet performance monitoring

Supported Supported

6.1.2 Application The OptiX OSN 3500 integrates the access of Ethernet services on the SDH transmission platform, so it can transmit both the voice service and data service.

EPL Service

(1) EPL service based on port

EPL implements the point-to-point transparent transmission of Ethernet services. As shown in Figure 6-1, the Ethernet services of different NEs are transmitted to the destination node through their respective VCTRUNKs. The Ethernet service is provided with a perfect SDH self-healing ring (SHR) protection scheme, and its reliable transmission is thus guaranteed.



SHR

1

3

4

5

Traffic flown

NE 4

NE 1

NE 2

NE 3

2

Figure 6-1 The EPL service based on port

(2) EPL service based on port +VLAN

EVPL services are isolated through VLAN tags during bandwidth sharing. As shown in Figure 6-2, flow classification is performed for the Ethernet service according to the port and VLAN ID to distinguish different VLANs of Companies A and B. Up to two priorities can be set according to the flow classification result. For security purpose, the OptiX OSN 3500 isolates services of different users by VLAN. In the figure below,

n VLAN 1 of Company A shares a VCTRUNK with VLAN 11 of Company B n VLAN 2 of Company A shares a VCTRUNK with VLAN 12 of Company B, n VLAN 3 of Company A shares a VCTRUNK with VLAN 13 of Company B

All services of Company A are converged to NE1 and are output from the FE/GE interface of the NE1, and then are sent to the Lanswitch for further processing.




VLAN 1

VLAN 2

VLAN 13

VLAN 1

VLAN 2VLAN 3

Headquarters ofCompany B

Branch

Branch

Branch

VLAN 12

VLAN 3

VLAN 11 VLAN 12

VLAN 13

Headquartersof Company A

VLAN 11

1 3

2

Traffic flown

SHR

NE 1

NE 2

NE 3

NE 4

Figure 6-2 The EPL service based on port+VLAN

EVPL Service

The OptiX OSN 3500 adopts the Martini modes to construct the multi-protocol label switching (MPLS) Layer 2 VPN and provide EVPL service.

The EVPL service offers point-to-point connection and implements service convergence for users. As shown in Figure 6-3, the system searches for the Port + VLAN ID table for the external label (Tunnel) and internal label (VC), and add them to the accessed Ethernet frames. Data transfer in the network is based on the MPLS label, which is switched at the label switch path (LSP). Then, the data will be transmitted to the NE4 equipment, which strips the MPLS label and transfers the data to the corresponding port. The OptiX OSN 3500 integrates the function of P equipment and PE equipment.

Corp A

Company B Company B

NE1 NE4NE2 NE3P ort A

P ort B

Port A

Port B

Tunnel Label VC Label DataCompany

60 10 ...A70 20 ...B... ... ......

60 10 Data70 20 Data

61 10 Data71 20 Data

10 Data20 Data

Tunnel labelswitching

Tunnel labelswitching

NE4 strips the MPLS lablesand Transfers the frame tocorresponding ports

L2 MPLS network composedby OptiX OSN Products

Company ACompany A6272

Tunnel VC labeladding/stripping

Tunnel VC labeladding/stripping

Figure 6-3 The EVPL service with MPLS label



EPLAN Service

The OptiX OSN 3500 supports Layer 2 switching of Ethernet data by the EPLAN service, which is transferred according to their destination media access control (MAC) addresses.

As shown in Figure 6-4, LANs of Company A and B are connected to four NEs. The Ethernet service between the NEs is not of a fixed point-to-point type. For example, a user of Company A connecting to NE3 want to communicate with users of Company A connecting to three other NEs. That is, the flow direction of services is not definite. The Ethernet Layer 2 switching function provided by the OptiX OSN 3500 can be employed to solve such a problem. For example, an Ethernet MAC address transfer table is formed in the system when the relevant settings are made to NE3. The system can learn to periodically update the table. Then, the data of Company A and B accessed at NE3 is transmitted to their destinations over different VCTRUNKs selected according to their MAC transfer table or over the same VCTRUNK.

In this way, the system configuration is significantly simplified and the bandwidth utility is improved. The corresponding maintenance and management becomes convenient for the operator.

Company A Company B

NE1

Company A

Company B

Company ACompany B

Company A

Company B

MAC Addr ess VC-Tr unkMAC 1 NE1 ①MAC 2 NE4 ②MAC 3 NE2 ③

… … …

NE2

NE3

NE41

23

SHR

n Traffic flow

Figure 6-4 Layer 2 switching of Ethernet service

EVPLAN Service

The OptiX OSN 3500 adopts the Martini MPLS Layer 2 VPN encapsulation format to support the Ethernet virtual private LAN (EVPLAN) service.

EVPLAN service implements the multipoint-to-multipoint connection of user sites. Users regard the EVPLAN network as a big VLAN where the user service is converged. As shown in Figure 6-5, when the user’s Ethernet frame (the source address is MAC H, and the destination address is MAC A, B or C) enters the PE equipment, the system searches for the Layer 2 transfer table for the internal label




(VC label). Then, the frame is transferred to the corresponding tunnel, where it is attached the external label (tunnel label). Thus, different LSPs are set up according to different addresses. The MPLS labels are switched at the LSP and then transferred to the corresponding PE equipment, where the tunnel and VC labels are stripped. Subsequently, the Ethernet frame is transferred to the corresponding output port according to the Layer 2 MAC transfer table.

Branch CP

Branch A

Headquarters

Branch B

PE

PE

PE

Address =MAC C

Address =MAC A

Address =MAC B

Address =MAC HSink VC LabelTunnel Label

MAC A 101MAC B 202MAC C 303

Source

MAC H

MAC H

MAC H

LSP

LSP1LSP2LSP3

MPLSCore

LSP1 LSP2

LSP3

P PE

Transferd tocorrespondingport via the Layer2 route table

Figure 6-5 Application of EVPLAN service

6.1.3 Protection The Ethernet service of the OptiX OSN equipment takes the protection of several levels, including:

n Protection of LCAS n Protection of RSTP n 1:1 TPS of N2EFS0 n Protection of optical transmission layer, such as MSP and SNCP

LCAS

LCAS provides an error tolerance mechanism, enhancing the reliability of virtual concatenation. It has the following functions:

n Configures the system capacity, adds or reduces the number of VC involved in the virtual concatenation and changes the service bandwidth dynamically without damaging the service.

n Protects and recovers failed members.

As shown in Figure 6-6, LCAS adds or deletes members to increase or decrease the bandwidth dynamically without affecting the service.



I want another 10 Mbandwidth. Member

Member Headquarters

Branch

BranchNew member

MSTP network

MSTP

Headquarters

Member

Member

Figure 6-6 LCAS adjusts bandwidth dynamically

As shown in Figure 6-7, LCAS can protect the Ethernet service. When some members fail, the failed members are deleted automatically while other members remain transmitting data normally. When the failed members are available again, they are recovered automatically, and the data is loaded to them again.

Member

Member HeadquartersBranch

Failed member

Member

Member HeadquartersBranch

Delete failed member

MSTP network

MSTP Figure 6-7 LCAS protects the virtual concatenation group

STP/RSTP

The Ethernet boards support spanning tree protocol (STP) and rapid spanning tree protocol (RSTP). The RSTP protects the link by restructuring the topology. When




the RSTP is started, it can modify the logic network topology to avoid broadcast storms.

1:1 TPS of N2EFS0

Ethernet processing board N2EFS0 supports two 1:1 TPS protection groups.

MSP and SNCP

Ethernet service is protected by MSP or SNCP in optical transmission layer.

6.2 RPR Features This section introduces the RPR features of the OptiX OSN 3500 in terms of function, application and protection.

6.2.1 Function The EMR0 and EGR2 boards of the OptiX OSN 3500 supports resilient packet ring (RPR) features defined by IEEE 802.17. RPR employs a dual-ring structure utilizing a pair of unidirectional counter-rotating rings, as shown in Figure 6-8. Both the outer ring and the inner ring bear data packets and control packets, featuring high bandwidth utilization. The control packets on the inner ring carry control information for the data packets on the outer ring, and the control packets on the outer ring carry control information for the data packets on the inner ring. The two rings backup and protect for each other.

Node 1

Outer ring control

Node 2

Node 3

Node 42.5 Gbit/s RPR

Outer ring data

Inner ring data

Inner ring control

Figure 6-8 RPR ring

Function List

Table 6-3 lists the basic functions of the RPR boards.



Table 6-3 RPR board functions

Function N1EMR0 N2EMR0 N2EGR2

Port number 1 GE+12 FE 1 GE+12 FE 2 GE

Service frame format Ethernet II, IEEE 802.3, IEEE 802.1QTAG



16 VC-4 (2.5 Gbit/s)

Mapping granule VC-3, VC-3-2v, VC-4, VC-4-xv (X≤8)

Ethernet virtual private line (EVPL)

Supported Supported Supported

Ethernet virtual private LAN (EVPLAN)


Static MPLS label Supports MartinioE label



stack VLAN Supported Supported Supported

VLAN Supports 4096 VLAN labels, as well as the adding, and deletion of VLAN labels, compliant with IEEE 802.1q/p.

Supports 4096 VLAN labels, as well as the adding, deletion and switching of VLAN labels, compliant with IEEE 802.1q/p.

Rapid spanning tree protocol (RSTP)


Multicast (IGMP Snooping)


RPR protection Steering, Wrapping, Wrapping + Steering The switching time is less than 50ms.

Encapsulation The GFP-F as stated in ITU-T G.7041 is supported. LAPS, compliant with ITU-T X.86.

LCAS Supports LCAS and complies with ITU-T G.7042.

CAR N1EMR0 supports CAR based on port or port + VLAN with the granularity of 64 kbit/s. N2EMR0 and N2EGR2 support CAR based on port, port + VLAN, or port + VLAN + Priority with the granularity of 64 kbit/s.




Function N1EMR0 N2EMR0 N2EGR2

QoS traffic classification

N1EMR0 supports PORT, PORT+VLAN ID, PORT+VLAN PRI based traffic classification. N2EM40 and N2EGR2 support PORT, PORT+VLAN ID, PORT+VLAN ID+VLAN PRI, MPLS_label based traffic classification.

Flow control Supports flow control and complies with IEEE802.3X.

Port aggregation (within the board)

Not supported Supported Supported

Weighted fairness algorithm


Topology discovery Supported Supported Supported

Maximum node number

255 255 255

Service class A0, A1, B_CIR, B_EIR and C

Service Class

The user service has three classes, A, B and C. Class A is further divided into A0 and A1 on the RPR ring. Class B is further divided B_CIR (Committed Information Rate) and B_EIR (Excess Information Rate). Table 6-4 gives the difference of these classes.

Table 6-4 RPR service class

Class Sub-Class Bandwidth Jitter Fair algorithm Application

A0 Allocated, irreclaimable

Low Irrelevant Real time A

A1 Allocated, reclaimable

Low Irrelevant Real time

B_CIR Allocated, reclaimable

medium Irrelevant Near real time B

B_EIR Opportunistic High Relevant Near real time

C C Opportunistic High Relevant Best effort



Topology Discovery

The topology discovery function realizes the plug and play feature, for the function provides reliable method to discover the network nodes and their variation. In this case, the nodes of an RPR can be automatically added, deleted or switched.

To increase or decrease the total bandwidth of an RPR, use the LCAS function. The LCAS features adding and reducing bandwidth dynamically without affecting existing services.

Spatial Reuse

The stripping of unicast frames at the destination station realizes spatial reuse on an RPR. As shown in Figure 6-9, the bandwidth of a ring is 1.25 Gbit/s. Traffic 1 transferred from node 1 to node 4 is stripped from the ring at the destination node 4. After the arrival of traffic 1 at node 4, traffic 2 can be transferred from node 4 to node 3, by occupying the link capacity that may have been occupied by traffic 1 if it is not stripped at node 4.

Node 1

Bandwidth of single ring is1.25Gbit/s

Node 2

Node 3

Node 4Dual-ring2.5 Gbit/s RPR

Traffic 11.25 Gbit/s

Traffic 21.25 Gbit/s

Figure 6-9 Spatial reuse

Fairness Algorithm

The outer ring and the inner ring of an RPR support independent weighted fairness algorithm. The fairness algorithm assures access of the low-class B_EIR and C services. The weight of the fairness algorithm is provisionable to decide the access rate of a node. A node needs to set weights at the outer and the inner rings, and the two weights decide the bandwidth of low-class services upon bandwidth contention. As shown in Figure 6-10, the outer ring weights of nodes 2, 3 and 4 are 1. Suppose the available bandwidth on the outer ring for low-class services is 1.2 Gbit/s, the fairness algorithm will allocate 400 Mbit/s for the low-class services from nodes 2, 3 and 4 to node 1 respectively. Figure 6-11 shows a fairness algorithm with different weights: the weights of nodes 2, 3 and 4 on the outer ring are 1, 3 and 2 respectively.




The fairness algorithm allocates 200 Mbit/s for node 2, 600 Mbit/s for node 3 and 400 Mbit/s for node 4.

Node 1

Node 2

Node 5

Node 6

Dual-ring2.5 Gbit/s RPR

Node 4

Node 3

1

3

2

23

Traffic Bandwidth400 Mbit/s400 Mbit/s400 Mbit/s

1

Node3Node4

Node WeightNode2 1

11

Figure 6-10 Fairness algorithm when the weight is 1

Node 1

Node 2

Node 5

Node 6


Node 4

Node 31

3

2

23

Traffic Bandwidth400 Mbit/s600 Mbit/s200 Mbit/s

1

Node3Node4

Node WeightNode2 1

32

Figure 6-11 Fairness algorithm when the weights are different

6.2.2 Application The EMR0 board supports the application of EVPL and EVPLAN services.

EVPL

The EVPL service supports traffic classification based on port or port + VLAN, and encapsulates and forwards the traffic in the form of MPLS MartinioE. Figure 6-12 illustrates the accessing, forwarding and stripping of a unidirectional EVPL service. Node 2 inserts Tunnel and VC labels to the packet, sends it to the RPR. Node 3 forwards the packet and the destination node 4 strips it. Figure 6-13 illustrates the



EVPL service convergence, implementing traffic classification through port + VLAN, so that the services can be concentrated at the GE port of node 1.

Node 1

Node 3

FE/GE


ActionTunnel

VCDestination

Insertion100100

Node 4

LSP ActionTunnel

VC

Stripping100100

Action Forwarding

Node 4Node 2FE/GE

Figure 6-12 EVPL accessing, forwarding and stripping

Node 1

Node 3


FE

FE

GE

Node 2 Node 4

Traffic Tunnel DestinationPort1+VLAN 2

VC200 Node 2200

Port1+VLAN 3 300 Node 3300Port1+VLAN 4 400 Node 4400

FEVLAN 2

VLAN 3

VLAN 4

VLAN 4

VLAN 3VLAN 2

Figure 6-13 EVPL service convergence

EVPLAN

The EVPLAN service supports traffic classification based on port or port + VLAN, and encapsulates and forwards the traffic in the form of stack VLAN. The EVPLAN service is realized by creating virtual bridge (VB) in the board. VB supports source MAC address learning and static MAC route configuration. Figure 6-14 shows an example of EVPLAN service. The VB of each node determines the forward port of packets through address learning and rpr1 is the port to access packets to the RPR. For node 1, if the destination address is A1, the packet is




forwarded through port 1; if the destination is A2, the packet is forwarded through port 2. If the destination is B1, B2 or C1, the packet is forwarded through port rpr1 to the RPR, added a stack VLAN label 100. Node 2 forwards packets in the similar manner.

A2

Node 1

Node 3


Node 2 Node 4

MAC stack VLANPortA1 noneA2 noneport 2B1 100rpr1

Port 1

B2 100rpr1C1 100rpr1

Port 2

Port 1

Port 2

Port 1

A1

B1

B2

C1

port 1

MAC forwarding table of node 1

MAC stack VLANPortA1 100A2 100rpr1B1 noneport 1B2 noneport 2C1 100rpr1

rpr1

MAC forwarding table of node 2

A2

Figure 6-14 EVPLAN service

6.2.3 Protection The RPR service of the OptiX OSN equipment takes the protection of several levels, including:

n Wrapping, Steering and Wrapping + Steering n LCAS n RSTP n Protection of optical transmission layer, such as MSP

Wrapping

If an equipment or facility failure is detected, the traffic is wrapped back to the opposite direction at the stations adjacent to the failure, connecting the outer ring with the inner ring. The protection switching time is less than 50ms. Though featuring fast protection switching, wrap protection wastes bandwidth.

As illustrated in Figure 6-15, traffic is transferred from node 4 to node 1 through nodes 3 and 2. If there is a fiber cut between node 2 and node 3, they will wrap the traffic and connect the two rings together for protection.



Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

XFiber cut Traffic flow

Figure 6-15 Wrapping protection

Steering

For steering protection, a station shall not wrap a failed segment when a failure is detected. Instead, the source node will send traffic to the destination through a route avoiding the failed link. When there are not more than 16 nodes on the ring, the protection switching time is less than 50ms. The steering protection does not waste bandwidth, but it needs longer switching time when the networking is in large scale and some data before setting up a route may be lost when networking is in large scale.

Figure 6-16 illustrates an example of steering protection. Node 4 sends traffic to node 1 on the outer ring through nodes 3 and 2. If there is a fiber cut between node 2 and node 3, the topology discovery function helps the traffic be transferred to node 1 over the inner ring through nodes 5 and 6.




Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

XFiber cut

Traffic flowafter switching

Traffic flow beforeswitching

Figure 6-16 Steering protection

Wrapping+Steering

The protection method of wrapping+steering switches the services first in the way of wrapping upon a failure on the ring, to ensure the switching speed and minimum packet loss. After the topology discovery protocol updates the topology after the failure, steering method works to ensure that the services are sent to the destination node through the best path in the new topology, which minimizes the waste of bandwidth.

Figure 6-17 shows an example of wrapping+steering protection. Before a failure occurs in the ring, the service from node 4 to node 1 passes through node 3 and node 2 and reaches node 1 along the outer ring. When a fiber cut is detected between node 2 and node 3, wrapping method takes effect. The service is looped back at nodes 2 and 3. After the topology discovery protocol updates the topology, steering method triggers a switching. The service passes through nodes 5 and 6 and reaches node 1 along the inner ring based on the new topology.



X Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

Fiber cut

Traffic flowafter switching

Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

XFiber cut Traffic flow

Figure 6-17 Wrapping+steering protection

LCAS

LCAS adds and reduces the bandwidth dynamically, and protects the bandwidth.

For details about LCAS, refer to "6.1.3 Protection".

RSTP

The RPR boards support rapid spanning tree protocol (RSTP). The RSTP protects the link by restructuring the topology. When the RSTP is started, it can modify the logic network topology to avoid broadcast storms.

MSP

Ethernet service is protected by MSP in optical transmission layer.




6.3 ATM Features This section describes the ATM features of the OptiX OSN 3500 in terms of functions, application, and protection.

6.3.1 Functions The OptiX OSN 3500 provides four types of ATM processing boards, ADL4, ADQ1, IDL4 and IDQ1.

An ADL4 board accesses and processes one STM-4 ATM service and an ADQ1 board accesses and processes four STM-1 ATM services. When working with the PL3 or PD3 board, the ADL4 board or ADQ1 board accesses and processes E3 ATM services. The functions of the two boards are listed in Table 6-5.

Table 6-5 Functions of the ADL4 and ADQ1

Board Function

ADL4 ADQ1

Front panel interface 1 x STM-4 4 x STM-1

Optical interface specification

S-4.1, L-4.1, L-4.2 or Ve-4.2

I-1, S-1.1, L-1.1 L-1.2 or Ve-1.2

Optical connector LC

Optical module SFP

E3 ATM interface Accesses 12 x E3 services through the N1PD3, N1PL3, or PL3A board.

IMA Not supported Not supported


8 VC-4s, or 12 VC-3s + 4 VC-4s

ATM switching capability

1.2 Gbit/s 1.2 Gbit/s

Mapping granule VC-3, VC-4, or VC-4-xv (x≤4)

Processable service types CBR, rt-VBR, nrt-VBR and UBR

Number of ATM connections

2048

Traffic type and QoS IETF RFC2514, ATM forum TM 4.0

Supportable ATM multicast connections

Spatial multicast and logic multicast

ATM protection (ITU-T I.630)

Unidirectional/Bidirectional 1+1, VP-Ring or VC-Ring



Board Function

ADL4 ADQ1

OAM function (ITU-T I.610)

AIS, RDI, LB (Loopback), CC (continuity check)

An IDL4 board accesses and processes one STM-4 ATM service and an IDQ1 board accesses and processes four STM-1 ATM services. When working with the N1PQ1 or N1PQM board, the IDL4 board or IDQ1 board accesses and processes IMA E1 services. The functions of the two boards are listed in Table 6-6.

Table 6-6 Functions of the IDL4 and IDQ1

Board Function

N1IDL4 N1IDQ1

Front panel interface

1 x STM-4 4 x STM-1

Optical interface specification

S-4.1, L-4.1, L-4.2 or Ve-4.2 I-1, S-1.1, L-1.1 L-1.2 or Ve-1.2


Optical module SFP

E3 ATM interface Not supported Not supported

IMA (compliant with ATM Forum IMA 1.1 )

Accesses and processes IMA service when working with the E1 processing board N1PQ1, N1PQM or N1PD1. Supports up to 63 IMA E1 services. Supports up to 32 IMA groups mapped to the ATM port, and each group supports 1–32 E1s. Supports up to 63 E1 links of none-IMA group mapped to ATM port. Supports maximum IMA multi-path delay 226ms.


8 VC-4, or 63 VC-12 + 7 VC-4

ATM switching capability

1.2 Gbit/s 1.2 Gbit/s

Mapping granule VC-12, VC-4, or VC-4-xv (X≤4)

Service type CBR, rt-VBR, nrt-VBR and UBR

Number of ATM connections

2048 2048

Traffic type and QoS

IETF RFC2514, ATM forum TM4.0




Board Function

N1IDL4 N1IDQ1

Supportable ATM multicast connections

Spatial multicast and logic multicast

ATM protection (ITU-T I.630)

Unidirectional/Bidirectional 1+1, VP-Ring, VC-Ring

OAM function (ITU-T I.610)

AIS, RDI, LB (loopback), CC (continuity check)

Board level 1+1 protection

Supported, with switching time less than 1s

6.3.2 Application

Supportable Services and Traffic Types

The OptiX OSN 3500 supports CBR, rt-VBR, nrt-VBR, and UBR services rather than ABR services. CBR services apply to voice services, as well as video services and circuit simulation services of a constant bit rate. These services require guaranteed transmission bandwidth and latency. Rt-VBR services apply to audio and video services of a variable bit rate. Nrt-VBR services are mainly used for data transmission. UBR services are used for LAN simulation and file transmission. In terms of the supported service and traffic types, the OptiX OSN 3500 meets IETF RFC2514, ATM Forum TM 4.0 and ATM Forum UNI 3.1 recommendations, as shown in the Table 6-7.

Table 6-7 Supportable ATM service and traffic types of the OptiX OSN 3500

No. Traffic type Service type Parameter

1 atmNoTrafficDescriptor UBR None

UBR.1 Clp01Pcr 2 atmNoClpNoScr

CBR Clp01Pcr

3 atmClpNoTaggingNoScr CBR Clp01Pcr, Clp0Pcr

4 atmClpTaggingNoScr CBR Clp01Pcr, Clp0Pcr

5 atmNoClpScr nrt-VBR.1 Clp01Pcr, Clp01Scr, Mbs

6 atmClpNoTaggingScr nrt-VBR.2 Clp01Pcr, Clp0Scr, Mbs

7 atmClpTaggingScr nrt-VBR.3 Clp01Pcr, Clp0Scr, Mbs

8 atmClpTransparentNoScr CBR.1 Clp01Pcr, Cdvt

9 atmClpTransparentScr rt-VBR.1 Clp01Pcr, Clp01Scr, Mbs, Cdvt



No. Traffic type Service type Parameter

10 atmNoClpTaggingNoScr UBR.2 Clp01Pcr, Cdvt

UBR Clp01Pcr, Cdvt 11 atmNoClpNoScrCdvt

CBR Clp01Pcr, Cdvt

12 atmNoClpScrCdvt rt-VBR.1 Clp01Pcr, Clp01Scr, Mbs, Cdvt

13 atmClpNoTaggingScrCdvt rt-VBR.2 Clp01Pcr, Clp0Scr, Mbs, Cdvt

14 atmClpTaggingScrCdvt rt-VBR.3 Clp01Pcr, Clp0Scr, Mbs, Cdvt

Application of Band Exclusive ATM Services

When the bandwidth is not shared, ATM services at the source and sink NEs are processed only at the ATM layer through the ATM service processing board. On intermediate NEs, only SDH timeslot pass-through is performed, without ATM layer processing. In this case, each ATM service has the whole VC-3/VC-4 channel to itself. The ATM services are converged at the central node and then multiplexed to an STM-1 or STM-4 optical port for output. As shown in the Figure 6-18, the 34 Mbit/s ATM services of NE1 and NE3 each occupy a VC-3 bandwidth. The 155 Mbit/s ATM service of NE2 occupies a VC-4 bandwidth alone. SDH timeslot pass-through is performed at NE3 only. After they reach the central site NE4, they are converged through the ATM board and output through the 622 Mbit/s optical interfaces.

2.5 Gbit/s SDHRing

NE 2 NE 4

NE 1

NE 3

34M ATMTraffic

34M ATMTraffic

155M ATMTraffic 622M ATM

Traffic

ServiceConvergence

DSLAM

DSLAM

RouterDSLAM

Figure 6-18 Application of Band exclusive ATM Services




Application of Band-Shared ATM Services

In shared rings VR-Ring and VC-Ring, the ATM services share the same bandwidth and are multiplexed statistically. The ATM services on each NE share the same VC (VC-3, VC-4, or VC-xv) and are all processed on the ATM layer. As shown in the Figure 6-19, NE1 accesses E3 ATM traffic through the tributary board and sends it to the ATM board for ATM switching and protection (1+1 or 1:1) configuration. Then the traffic is encapsulated into VC-4-xv and is sent to the line through the cross-connect board. NE2 accesses STM-1 ATM traffic through the optical interface and then implements ATM switching and protection configuration. The ATM traffic from NE1 is also dropped at NE2 for ATM layer processing. Then the locally accessed traffic and that from NE1 are encapsulated into the same VC-4-xv and are sent to the next NE. The same goes at NE3 and NE4. A single VP/VC-Ring can have a maximum bandwidth of 300 Mbit/s.

VC4-XvVP/VC-Ring

NE 2

NE 4

NE 1

NE 3

34M ATMTraffic

34M ATMTraffic

155M ATMTraffic

622M ATMTraffic

DSLAM

DSLAM

Router

DSLAM

The ATM traffic from NE1is droped to the NE2, thensend to VP/VC-Ring afterconverged with localservice.

Figure 6-19 VP/VC-Ring

6.3.3 Protection The ATM service of the OptiX OSN equipment is protected on many layers, including:

n Protection on the ATM layer n Protection on the optical transmission layer, such as MSP n 1+1 board level protection of IMA boards

Protection on the ATM Layer

Compliant with ITU-T Recommendation I.630, protection on the ATM layer can be classified into many types according to different classification method, as shown in the Table 6-8. Select the configuration as required, for example, 1+1 bidirectional non-revertive protection".



Table 6-8 Classification of ATM protection

Classification mode Types

Bridging function 1+1 protection/1:1 protection

Switching direction Unidirectional protection/Bidirectional protection

Connection level VPC protection/VCC protection

Protection domain Trail protection/Subnetwork connection protection

Revertiblility Revertive protection/Non-revertive protection

Protected object Single connection protection/Group connection protection

Protection on the Optical Transmission Layer

The ATM service is also protected by the self-healing network on the optical transmission layer, such as MSP. You can set the hold-off time for ATM protection switching. When a network damage occurs, the MSP on lower layers is switched first, and thus achieving the protection of working ATM service (in this case, the protection switching on the ATM layer is not activated).

1+1Board Level Protection of IMA boards

The IDL4 and IDQ1 support the 1+1 board level protection. When configure 1+1 board level protection, the IDL4 and IDQ1 must be inserted in the paired the slots.

6.4 SAN Features The OptiX OSN 3500 provides a multi-service transparent transmission processing board: MST4, to access and transmit transparently:

n Fiber channel (FC) n Fiber connection (FICON) n Enterprise systems connection (ESCON) n Digital video broadcast – asynchronous serial interface (DVB-ASI) services.

Table 6-9 lists the function of the MST4.

Table 6-9 Functions of the MST4 board

Board Function

MST4

Optical interface 4


Optical module SFP




Board Function

MST4

Bandwidth 2.5 Gbit/s

FC50, FC100/FICON and FC200

Provide 4 x FC (FC50, FC100/FICON and FC200), with total bandwidth less than 2.5 Gbit/s. Support transmission of FC service at full rate, that is, support FC200, 2 x FC100, or 4 x FC50.

Distance The first and second interfaces support FC service distance extension function: FC100 supports 3000 km, and FC200 supports 1500 km.

Mapping granule VC-4-xc (x=4, 8, 16)

Encapsulation GFP-T

ESCON Support 4 x ESCON services.

DVB-ASI Support 4 x DVB-ASI services.

The services and rates provided by the MST4 are listed in Table 6-10.

Table 6-10 Services and rates provided by the MST4

Service type Rate Remarks

FC50 531.25 Mbit/s SAN service

FC100/FICON 1062.5 Mbit/s SAN service

FC200 2125 Mbit/s SAN service

ESCON 200 Mbit/s SAN service

DVB-ASI 270 Mbit/s Video service

OptiX OSN 3500 Technical Manual - System Description 7 Intelligent Features


7 Intelligent Features

This chapter describes the functions provided by Huawei OptiX automatic switching optical network (ASON).

& Note The intelligent software system is to be purchased and installed additionally for the OptiX OSN 3500.

7.1 Topology Auto-Discovery 7.1.1 Control Topology Auto-Discovery

After the fibers in an ASON network are connected correctly, each ASON NE discovers control links automatically through OSPF and floods its own control link to the whole network. Each NE then gets the network-wide control links, that is, the network-wide control topology. Then, each NE can calculate the route to any of the other NEs in the network.

As shown in Figure 7-1, after the fibers in the whole network are connected, ASON NEs discover the network-wide control topology.

7 Intelligent Features OptiX OSN 3500



R1

R2

R3

R4

:ASON NE

:User equipment Figure 7-1 Control topology auto-discovery

7.1.2 Service Topology Auto-Discovery After an ASON NE creates a control channel between neighbor NEs through LMP, TE link verification can be started. Each ASON NE floods its own TE links to the whole network through OSPF-TE. Each NE then gets the network-wide TE links, that is, the network-wide service topology.

ASON software can detect service topology change in real time, including the deletion and addition of links, as well as the link parameters change, and then reports the change to T2000, which performs real-time refresh.

As shown in Figure 7-2, if one TE link is cut, the NM updates the service topology displayed on the NM in real time.



:ASON NE

:User equipment

R1

R2

R3

R4

Figure 7-2 Service topology auto-discovery

7.2 End-to-End Configuration The ASON supports both SDH static services and end-to-end ASON services. To configure an ASON service, you only need to specify its source node, sink node, bandwidth requirement, and protection level. Service routing and cross-connection at intermediate nodes are all automatically completed by the network. You can also set some nodes or links that the service necessarily passes through or not pass through to restrict the service routing.

Compared with service configuration of SDH networks, it fully utilizes the routing and signaling functions of the ASON NEs and thus it is convenient to configure services.

Take the configuration of a 155 Mbit/s ASON service between A and I in Figure 7-3 for example. The network automatically finds the A-D-E-I route and configures cross-connection at nodes A, D, E and I. Although there is more than one route from A to I, the network will calculate the best route according to the configured algorithm. Here we suppose A-D-E-I is the best route.

The service is created as follows:

n Choose the bandwidth n Choose the service protection level n Choose the source node n Choose the sink node n Create the service




:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I

Figure 7-3 End-to-end service configuration

7.3 Mesh Networking Protection and Restoration The ASON provides mesh networking protection to enhance service survivability and network security. As a main networking mode of ASON, mesh features high flexibility and scalability. Different from traditional SDH networking modes, mesh networking does not need 50% bandwidth reserved so it can save bandwidth resources to satisfy the increasingly large bandwidth demands. This networking mode also provides more than one route for each service so it can best utilize the network resources with higher security.

As shown in Figure 7-4, when the C-G link failed, to restore the service, the network will calculate another route from D to H and create a new LSP to transmit the service.



R1

R2

R3

R4

AB

C

D

E

F

GH

I

Trail restoration

:ASON NE

:User equipment

Figure 7-4 Trail restoration

7.4 Service Level Agreement The ASON can provide services of different QoS to different clients. This is service level agreement (SLA). Table 7-1 shows the service level in the ASON.

Table 7-1 Service level

Service Attribute

Diamond service Gold service Silver service Copper service Iron services

Protection and restoration policy

Protection and restoration

Protection and restoration

Restoration No protection and no restoration

Preemptable

Protection and restoration method

SNCP and rerouting

MSP and rerouting

Rerouting - -

Switching time and rerouting time

Switching time < 50ms Rerouting time < 2s

Switching time < 50ms Rerouting time < 2s

Rerouting time < 2s

- -

The use of multiplex section link by different classes of service is described in Table 7-2. The numbers1, 2, and 3 represent priority of bandwidth selection. The number I represent the highest priority.




Table 7-2 Description of multiplex section using by ASON service

Service class Working link Protection link

Non-protected link

Service creation Not used Not used Used

Service rerouting

Not used Not used Used

Diamond

Service optimization


Service creation Used Not used Not used

Service rerouting

Used with priority

Not used Used when the working link resources are insufficient.

Gold


Used with priority

Not used Used when the working link resources are insufficient.

Service creation Not used Not used Used

Service rerouting


Silver



Service creation Not used Not used Used Copper



Iron Service creation Not used Used Not used

7.4.1 Diamond Services A diamond service is a service provided with 1+1 protection from its source node to its sink node. It is also called 1+1 service. It has two different LSPs between the source node and the sink node. Furthermore the two LSPs can not pass through a same link. One is called the working LSP, and the other the protection LSP. The same service is transmitted on the working LSP and the protection LSP at the same time. If the working LSP is working well, the sink node receives the service from the working LSP; otherwise, from the protection LSP.

Figure 7-5 shows the topology of a diamond service.



:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I

Protection LSP

Working LSP

Figure 7-5 A diamond service

A diamond service has the following features.

n Diamond service can not use multiplex section links. n Failure of either LSP of the diamond service triggers rerouting.

− If link resource is sufficient, two LSPs do not fully overlap after rerouting. − If link resource is insufficient, two LSPs fully overlap after rerouting. The

blocked LSP will not be rerouted. When the other LSP is blocked, a new LSP will be created to guarantee survival of the service.

n After rerouting, if the original route is good, the diamond service can not be switched to its original routes. But the diamond service can be optimized back to its original routes manually.

n Static SNCP services can be converted to diamond services. n Diamond services can be converted to static SNCP services. n Any LSP of a diamond service can be optimized, in other words the route of

any LSP can be changed. n Supports manual switching for diamond services. n Supports rerouting lockout. n Supports rerouting priority. n Supports changing service names

& Note Do not support service association and tunnel services.




7.4.2 Gold Services Gold services are also called 1:1 services. A gold service needs only one LSP. This LSP must use multiplex section working links. When a fiber on the path of a gold service is cut, the ASON will trigger multiplex section switching to protect the service at first. If the multiplex section switching fails, the ASON will trigger rerouting to restore the service.

As shown in Figure 7-6, you can create a gold service from A to I on condition that the three multiplex section protection rings are created first.

R1

R2

R3

R4

:ASON NE

:User equipment

AB

C

D

E

F

GH

I

MSP

MSP

MSP

Figure 7-6 A gold service

A gold service has the following features.

n A gold service can be created only when there are enough multiplex section working links.

n When creating a gold service, slots must be same in a multiplex section protection ring.

n When creating a gold service, you can specify the strict route. n When creating a gold service, the compulsory node can be specified. In this

case, you should specify timeslot. n When a fiber on the path of a gold service is cut, the ASON will trigger

multiplex section switching to protect the service at first. n If the multiplex section protection fails, the ASON will trigger rerouting to

restore the service. The ASON tries its best to find multiplex section working links for rerouting. If there are not enough such resources, it will use non-protected links to guarantee survival of the service. In that case, however, the service is degraded.



n After rerouting, when multiplex section working links are restored, this service cannot automatically revert. But, you can optimize the service to the multiplex section links.

n A gold service can use multiplex section working links in a 1:1 linear multiplex section chain.

n A gold service can use multiplex section working links in a two-fiber multiplex section ring.

n A gold service can use multiplex section working links in a four-fiber multiplex section ring.

n Static services which fully use multiplex section working links can be converted to gold services. The slots in a multiplex section ring must be the same.

n Static services which partially use multiplex links can be converted to gold services, but it is degraded.

n Gold services can be converted to static services. n Supports rerouting lockout. n Supports service optimization. n Supports changing service names.

& Note Service association is not supported.

7.4.3 Silver Services Silver services are also called rerouting services. Upon LSP failure, periodic rerouting will be performed until the rerouting succeeds. If there are not enough resources, it may fail to apply for an appropriate protection route and thus lead to service interruption. In Figure 7-7, A-B-G-H-I is a silver service. If the fiber between B and G is cut, the ASON will trigger rerouting from A to create a new LSP that does not pass the cut fiber, such as A-D-C-F-I.




:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I

Figure 7-7 A silver service

A silver service has the following features.

n Non-protected static services can be converted to silver services. n Silver services can be converted to static services. n A revertive silver service can revert to its original route automatically after

the network is restored. n Silver services cannot use multiplex section links. n Supports rerouting lockout. n Supports service optimization. n Supports rerouting priority setting. n Supports setting the rerouting revertive attribute. n Supports service association. n Supports changing service names.

7.4.4 Copper Services Copper services are also called non-protected services. If its LSP fails, service will be interrupted and it will not trigger rerouting.

A copper service has the following features.

n Non-protected static services can be converted to copper services. n Copper services can be converted to non-protected static services. n Copper services cannot use multiplex section links. n Supports service optimization. n Supports service association. n Supports changing service names.



7.4.5 Iron Services Iron services, also called preemptable services, create LSP by using the protection links in an MSP. When a switching is triggered, iron services are preempted, which then brings a service interruption. After MSP is restored, iron services are restored. The interruption, preemption and restore of iron services are reported to network management system. If the path fails and the service is interrupted, no rerouting is triggered.

An iron service has the following features:

n When you create an iron service, the creation fails if there is not enough multiplex section protection links.

n When you create an iron service, the protection links in a 1:1 linear MSP can be used.

n When you create an iron service, the protection links in a two-fibre bidirectional MSP can be used.

n When you create an iron service, the protection links in a four-fibre bidirectional MSP can be used.

n When an MSP switching is triggered, iron services are preempted, which then brings a service interruption.

n Not support rerouting. n Not support service optimization. n Supports changing service names. n Static extra services can be converted to iron services. n Iron services can be converted to static extra services.

7.5 Service Association Associated services are two associated common services that have different routes. During the rerouting or optimization of either LSP, the rerouting LSP will be link-disjoint with the associated LSP.

As shown in Figure 7-8, A-D-E-I and A-B-G-H-I are two associated LSPs. When the fiber between B and G is cut, the rerouting of the A-B-G-H-I LSP will avoid the A-D-E-I LSP.




:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I

Figure 7-8 Association services

Service association has the following features:

n Supports the cancellation of association. n Supports optimization of associated services. n Supports the separate rerouting for each path upon path failures. n Supports the association of two tunnel services. n Supports the association of two non-revertive silver services. n Supports association of two copper services n Supports the association of a non-revertive silver service and a copper

service. n Supports setting the rerouting priority. n Supports restarting and recovery of each node on the path. n Supports the association of services that have different or the same source

node. n Does not support association of diamond and gold services. n Does not support association of revertive silver services.

7.6 Tunnel Services The OptiX ASON supports tunnel services. Tunnel services are mainly used to carry VC12 or VC3 services.

As shown in Figure 7-9, there is an ASON server LSP between NE1 and NE2 which can be a gold LSP, silver LSP or copper LSP. After creating tunnel services, you must manually create and delete the lower order cross-connection from the tributary board to the line board. During rerouting or optimization of the tunnel services, however, the cross-connections at the source and sink nodes automatically switch to the new ports.



VC12

NE1 NE2

VC12ASON server LSP

VC4

VC12Cross-connection

Line unitTributary unit

Figure 7-9 Tunnel services

A tunnel service has the following features:

n Supports manually create and delete the lower order cross-connection from the tributary board to the line board.

n Supports rerouting lockout. n Supports the association of tunnel services. n Supports setting rerouting priority n Supports service optimization. n Supports changing service names. n Supports gold, non-revertive silver and copper level protection types. n Static server trail can be converted to tunnel services. n Tunnel services can be converted to static server trail. n Supports VC4 tunnels, not support VC12 or VC3 tunnels.

7.7 Service Optimization After the topology change several times, the ASON may have less satisfactory routes and thus need service optimization. Service optimization means to create a new LSP, switch the optimized service to the new LSP, and delete the original LSP so as to change and optimize the service without disrupting the service.

LSP optimization has the following features.

n Support manual optimization only. n The optimization can only be initiated at the source node. n The optimization does not change the protection level of the optimized

service. n During optimization, rerouting, degrade/upgrade, or deleting operations are

not allowed.




n During creation, rerouting, degrading/upgrading, starting or deleting operations, optimization is not allowed.

n Revertive rerouting services cannot be optimized before they are restored. n The following service types support optimization: diamond, gold, silver,

copper, associated, and tunnel services.

7.8 Equilibrium of Network Traffic The ASON calculates a best route according to CSPF algorithm. If there are many services between two nodes, there may be several services sharing a same route. The traffic equilibrium function is used to avoid this situation. As shown in Figure 7-10, there are many silver services between R2 and R4. To make the network more safe and reliable, the ASON allocates them to different route averagely as possible such as A-D-E-I, A-B-C-F-I and A-B-G-H-I.

:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I

Figure 7-10 Traffic equilibrium

7.9 Shared Risk Link Group Fibers in the same optical cable have the same risks, that is, when the cable is cut, all fibers are cut. So an ASON service should not be rerouted to another link that has the same risk.

Set the SRLG attribute correctly for the links of the same risks to make sure the two LSPs of a diamond service are not in the same cable and to enhance the possibility of successful rerouting at the first time. You can change the SRLG attribute.

During service creation or rerouting, it is supported to disjoint the SRLG to which the faulty link belongs. The SRLG attribute of the link can be preconfigured. The detailed disjoint strategy is as follows:

n When creating the second path for diamond services, the SRLG to which the link passed by the first path belongs is disjointed.



n During the rerouting of diamond services, the SRLG to which the faulty link and the link passed by the other path belong is disjointed.

n During the rerouting of gold services, if the faulty link is an MSP group link, the SRLG that the faulty link belongs to is not disjointed. If the faulty link is a non-protection link, the SRLG that the faulty link belongs to is disjointed.

n During the rerouting of silver services, the SRLG that the faulty link belongs to is disjointed.

n The disjoint strategy during service optimization is the same as that during service creation.

7.10 Conversion Between Static Services and ASON Services

Currently, Huawei’s OptiX ASON supports the following service conversion:

n Supports upgrading static SNCP services to diamond services. n Supports degrading diamond services to SNCP static services. n Supports upgrading static services to gold services. n Supports degrading gold services to static services. n Supports upgrading static services to silver services. n Supports degrading silver services to static services. n Supports upgrading static services to copper services. n Support degrading copper services to static services. n Supports upgrading static server trail to tunnel services. n Supports degrading tunnel services to static server trail.

& Note Only the static service where the first and the last nodes are in SNCP protection groups can be upgraded to diamond services. Only the static service that uses multiplex section working links can be upgraded to gold services. The static service that uses MSP group links partially can only be upgraded to the gold service with the protection state as degraded.

7.11 Restoring Network-Wide Service Routes to Original Routes

After many changes in an ASON network, service routes may differ from the original routes. The network-wide service restore function can be used to restore all service routes to the initial routes.

OptiX OSN 3500 Technical Manual - System Description 8 Protection


8 Protection

This chapter describes the protection schemes provided by the OptiX OSN 3500. It covers:

n Equipment level protection n Network level protection

8.1 Equipment Level Protection The OptiX OSN 3500 supports the following protection schemes at the equipment level:

n TPS protection for service processing boards n 1+1 hot backup for cross-connect unit and timing unit n 1+1 hot backup for the SCC unit n 1+1 protection for ATM boards n 1+1 hot backup for the power input unit n Protection for the wavelength conversion unit n 1:N protection for the +3.3 V board power supply n Intelligent fans n Abnormality-specific service protection

8.1.1 TPS Protection for Service Processing Boards The OptiX OSN 3500 provides 1:N TPS protection for the PQ1, PQM, PL3, PD3, SPQ4, SEP and N2EFS0 boards through electrical interface protection. That is, it provides TPS protection for the E1, T1, E3, T3, E4, STM-1 and Ethernet services

n E1 processing board PQ1 supports one 1:N (N≤8) TPS protection group. n E1/T1 processing board PQM supports one 1:N (N≤8) TPS protection group. n E3/T3 processing board PD3/PL3 supports two 1:N (N≤3) TPS protection

groups.

8 Protection OptiX OSN 3500



n E4/STM-1 processing board SPQ4 supports two 1:N (N≤3) TPS protection groups.

n STM-1 processing board SEP supports two 1:N (N≤3) TPS protection groups. n Ethernet processing board N2EFS0 supports two 1:1 TPS protection groups. n Co-existence of the above three different TPS protection groups. n The signal failure time is less then 50ms in TPS switching

8.1.2 1+1 Hot Backup for Cross-Connect Unit and Timing Unit The cross-connect unit and the timing unit are provided by the GXCSA, EXCSA, or UXCSA/B boards. The GXCSA, EXCSA and UXCSA/B boards employ 1+1 hot backup for protecting the cross-connect unit and the timing unit at the same time. When the active cross-connect and timing units are working normally, the standby ones are in standby working mode, neither undertaking the service cross-connection function nor providing timing to the system. They have the same cross-connect matrix setting and clock configuration as the active units. When the standby units receive the information indicating abnormal performance of the active units or a switching command sent by the NM, they will immediately take over the job of the active units, setting themselves into the active working mode and sending out a switchover event.

8.1.3 1+1 Hot Backup for the SCC Unit The SCC unit of the OptiX OSN 3500 has 1+1 hot backup protection. The standby SCC unit is in standby working mode when the active one is working normally.

8.1.4 1+1 Protection for ATM Boards The IDL4 and IDQ1 of the OptiX OSN 3500 support board level 1+1 protection. Their failure is detected by the board itself. If any failure occurs, the cross-connect board will initiate the switching, switching the services of the working ATM board to the protection board. The switching time is less than 1s. The prerequisites for protection switching of the ATM board are as follows:

n Manual switching. n Board power fails. n Board clock fails. n Board hardware fails.

8.1.5 1+1 Hot Backup for the Power Input Unit Through the two PIU boards, the OptiX OSN 3500 can access two –48 V DC working power supplies that work in backup mode. If either of them goes faulty, the other will operate to ensure the normal operation of the equipment.

8.1.6 Protection for the Wavelength Conversion Unit The arbitrary bit rate wavelength conversion unit LWX includes two types:



n Single-fed single receiving n Dual-fed signal selection

The dual-fed signal selection LWX supports intra-board protection, realizing optical channel protection with one board. The protection switching time is less than 50ms. The single-fed single receiving LWX supports inter-board protection, that is, 1+1 inter-board hot backup protection. The protection switching time is less than 50ms.

8.1.7 1:N Protection for the +3.3 V Board Power Supply The OptiX OSN 3500 provides 1:N power backup for the +3.3 V power supplies of other boards through the power backup unit on the AUX board. When the power supply of a board becomes faulty, the backup power takes over to ensure normal operation of that board.

8.1.8 Intelligent Fans For heat dissipation, the OptiX OSN 3500 adopts three intelligent fans in the fan unit. The power supplies for the fans serve as backup for each other.

The intelligent fans provide intelligent speed regulation and failure detection. Once one goes faulty, the other two operate at their maximum speeds. The running status of the fans is indicated by the corresponding indicators on the front panel of the fan unit.

8.1.9 Abnormality-Specific Service Protection

Power Failure in Software Loading Process

Application program and data have the check function. In the case the loading is interrupted, the basic input/output system (BIOS) will not start the unfinished program and data until they are successfully loaded.

Over-Voltage and Under-Voltage Protection

The power board is designed with a lightning protection component to effectively reduce the damages that may be possibly caused by transient high-voltage such as lightning. When the voltage is over low, this board will automatically reset the center processing unit (CPU) and the software will re-initialize the chips. The software will provide a mirror protection for important memories that may affect the services. In the case the voltage is not stable, which causes the memory value to change, the values can be recovered to normal. In addition, when the voltage is too low, the power system will automatically cut off the active power to protect the system.




Board Temperature Check

Temperature detection circuit is provided on the boards that generate much heat. When the ambient temperature is detected too high, an alarm is generated to remind the maintenance personnel to clean the fans.

8.2 Network Level Protection 8.2.1 Basic Networking Modes

Two basic structures of the transmission network are Chain and ring. Various complicated network structures are based on them in practice, as shown in Table 8-1.

Table 8-1 Basic networking modes

Networking mode Topology map

1 Chain

2 Ring

3 Tangent rings

4 Intersecting rings

5 Ring with chain



Networking mode Topology map

6 DNI

7 Hub

8 Mesh

Legend: MADM ADM TM ASON NE

8.2.2 SDH Trail Protection The OptiX OSN 3500 can implement the linear MSP and the MS ring protection.

Linear MSP

Linear MSP is mainly used in the chain network. The OptiX OSN 3500 supports 1+1 and 1:N (N≤14) protection schemes. In the 1:N protection mode, extra services are supported to be transmitted on the protection system. In the linear MSP scheme, the switching time is less than 50ms as specified in ITU-T Recommendation G.841.

MS Ring Protection

The OptiX OSN 3500 supports two-fiber MS shared protection ring, with the switching time less than 50ms, as specified in ITU-T Recommendation G.841.




In line with ITU-T Recommendation G.841, the OptiX OSN 3500 supports four-fiber MS shared protection ring, which provides ring switching and span switching in addition to the similar functions of the two-fiber bidirectional MSP.

8.2.3 SNCP The OptiX OSN 3500 supports SNCP as required by ITU-T G.841.

The OptiX OSN 3500 supports the end to end conversion of an unprotected trail to a SNCP-protected trail, as shown in Figure 8-1.

NE1NE4

NE3

NE2NE5

NE8

NE7NE6

A unprotected trail

NE1NE4

NE3

NE2NE5

NE8

NE7NE6

The working trail

Convert to a SNCP-protected trailConvert to a unprotected trail

The protection trail Figure 8-1 End to end conversion of a unprotected trail to a SNCP-protected trail

An unprotected trail can be converted to an SNCP-protected trail through Trail Management in the T2000. An SNCP-protected trail can also be converted to an unprotected trail. Further more, the following operations can be provided at trail level:

n Manual switching to protection path n Manual switching to working path n Forced switching to protection path n Forced switching to working path n Setting of the wait-to-restore (WTR) time n Setting of the revertive or non-revertive mode

8.2.4 Protection for Interworking Service on Rings As required by ITU-T Recommendation G.841, the OptiX OSN 3500 supports protection for interworking services on rings, even on the rings with different protection schemes (such as SNCP or MSP).



8.2.5 Fiber-Shared Virtual Trail Protection

STM-4SNCP

STM-4MSP

STM-16

STM

-16

Figure 8-2 Fiber-shared virtual trail protection

As shown in Figure 8-2, in the fiber-shared virtual trail protection, STM-16, STM-4, or even STM-1 optical paths are logically divided into low order and high order paths, and combined with other links to form the path-level rings. The path-level rings can have the working schemes, such as MSP, SNCP, and non protection.

8.2.6 MS Shared Protection Ring In the MS shared protection ring, an optical interface can be configured with multiple MSP groups, so that MS rings protection can share the same fiber and optical interface. This function depends on the capability of the optical board to process multiple sets of independent K bytes. SL64, SF16 and SL16 of the OptiX OSN 3500 support a maximum of two shared optical paths.

Figure 8-3 shows the networking for two-fiber MS-shared protection ring that the OptiX OSN 3500 supports.

STM-4/16 MS-shared ring

STM-16/64

STM-4/16 STM-4/16

STM-4/16STM-4/16

STM-4/16 MS-shared ring

Figure 8-3 MS-shared protection ring

For example, two lower-speed west line units share one higher-speed east line unit, as shown in Figure 8-4.




STM-16

MSP ring 1

MSP ring 2X

STM-16

STM-16

STM-64

Figure 8-4 Two lower-speed lines share one higher-speed line

The OptiX OSN 3500 also supports line units at the same speed to form bi-directional shared protection, as shown in Figure 8-5. In this case, the west STM-16 line unit can only add part of VC-4 services into the MS ring protection group.

STM-16

MSP ring 1

MSP ring 2X

STM-16

STM-16

STM-16

Figure 8-5 Sharing protection under the lines with the same speed

OptiX OSN 3500 Technical Manual - System Description 9 OAM


9 OAM

This chapter describes the maintenance capability and network management of the OptiX OSN 3500. It covers:

n Operation and maintenance n Administration

9.1 Operation and Maintenance The OptiX OSN 3500 provides the following powerful equipment maintenance capabilities:

n The GSCC board generates audible and visual alarms to remind the network administrators to take proper measures in the case of any emergency.

n The OptiX OSN 3500 provides 16 alarm input interfaces, four alarm output interfaces, four cabinet alarm indicator output interfaces, and alarm concatenation interfaces to facilitate operation and management of the equipment.

n All boards have running and alarm indicators to help the network administrators to locate and handle faults as soon as possible.

n The line board provides the function of the lower order path monitoring. These alarms include TU_AIS, TU_LOP.

n The OptiX OSN 3500 supports automatic check of a hardware change: The T2000 reports a notification that new hardware is installed in the NE.

n The OptiX OSN 3500 supports automatic laser shutdown (ALS) function of the single-mode optical interface of the SDH interface unit and Ethernet interface unit.

n The OptiX OSN 3500 supports automatic online detection of optical power of SDH and Ethernet optical interfaces.

n The swappable optical module is adopted to provide optical interface boards. Users can choose optical modules as required, and thus facilitating maintenance.

n The OptiX OSN 3500 supports query of SDH optical module parameters, which include optical interface type, fiber mode (multimode or single mode),

9 OAM OptiX OSN 3500



long or short haul, transmission distance, transmission rate, and wavelength, and so on.

n Orderwire phone function is provided to ensure dedicated communication channels for administrators at various stations.

n The running and alarm status of the OptiX OSN 3500 systems at all stations on the network can be monitored dynamically on the NM system.

n In-service upgrade of board software and NE software is supported. Board software and field programmable gate array (FPGA) supports remote loading, and provides the functions of error prevention loading and breakpoint continuous transmission.

n With remote maintenance function, the maintenance personnel can remotely maintain the OptiX OSN 3500 through PSTN when the equipment goes faulty.

n The PQM and PQ1 provide pseudo-random binary sequence function which supports remote bit error test.

9.2 Administration The OptiX OSN 3500 is uniformly managed by the family of iManager series transmission network management system (hereinafter referred to as the NM). Through the Qx interface, the NM can manage, maintain and test the entire optical transmission system in terms of fault, performance, configuration and security. The NM improves the quality of network services, lowers the maintenance cost and ensures rational use of network resources.

OptiX OSN 3500 Technical Manual - System Description 10 Technical Specifications


10 Technical Specifications

For ease of query, the technical specifications of the OptiX OSN 3500 are classified as follows:

n Interface type n Optical interface performance n Electrical interface performance n Clock performance n Transmission performance n Timeslot number n Power consumption and weight of boards n Electromagnetic compatibility n Environmental specification n Environment requirement

10.1 Interface Type Table 10-1 shows interface types of the OptiX OSN 3500.

Table 10-1 Interface types

Interface type Rate and feature

Ethernet interface 10Base-T. 100Base-TX, 100Base-FX, 1000Base-SX, 1000Base-LX, 1000Base-ZX

ATM interface 34368 kbit/s,155520 kbit/s, 622080 kbit/s

PDH/SDH electrical interface

1544 kbit/s, 2048 kbit/s, 34368 kbit/s, 44736 kbit/s, 139264 kbit/s, 155520 kbit/s

SDH optical interface

155520 kbit/s, 622080 kbit/s, 2488320 kbit/s, 9953280 kbit/s

Clock interface 2048 kbit/s, 2048 kHz

10 Technical Specifications OptiX OSN 3500



Interface type Rate and feature

Alarm interface Sixteen alarm input interfaces, four alarm output interfaces, alarm concatenated interfaces, four cabinet alarm indicator interfaces

Auxiliary interface Administration interface, orderwire interface, data interface

10.2 Optical Interface Performance 10.2.1 SDH Optical Interface

Table 10-2 shows the performance of the STM-1 optical interface of the OptiX OSN 3500.

Table 10-2 Performance of the STM-1 optical interface

Nominal bit rate 155520 kbit/s

Classification code

I-1 S-1.1 L-1.1 L-1.2 Ve-1.2

Operating wavelength (nm)

1260~ 1360

1261~ 1360

1280~ 1335

1480~ 1580

1480~ 1580

Mean launched power (dBm)

–15 to –8 –15 to –8 –5 to 0 –5 to 0 –3 to 0

Receiver minimum sensitivity (dBm)

–23 –28 –34 –34 –34

Minimum overload (dBm)

–8 –8 –10 –10 –10

Minimum extinction ratio (dB)

8.2 8.2 10 10 10






Classification code I-4 S-4.1 L-4.1 L-4.2 Ve-4.2


1261~1360 1274~1356 1280~1335 1480~1580 1480~1580


–15 to –8 –15 to –8 –3 to 2 –3 to 2 –2 to 2


–23 –28 –28 –28 –33


–8 –8 –8 –8 –13


8.2 8.2 10 10 10

Table 10-4 and Table 10-5 show the performance of the STM-16 optical interface of the OptiX OSN 3500.


Nominal bit rate

2488320 kbit/s

Classification code

I-16 S-16.1 L-16.1 L-16.2 L-16.2Je V-16.2Je(BA)

U-16.2Je(BA+PA)


1266~ 1360

1260~ 1360

1280~ 1335

1500~ 1580

1530~ 1560

1530~ 1565

1550.12


–10 to –3

–5 to 0 –2 to 3 –2 to 3 5 to 7 13 to 15 15 to 18


–18 –18 –27 –28 –28 –28 –34(Note)


–3 0 –9 –9 –9 –9 –10 (Note)


8.2 8.2 8.2 8.2 8.2 8.2 8.2

Maximum chromatic dispersion (ps/nm)

12 NA NA 1200~1600

2000 2800 3400




Note: The parameter is that of the PA.

Table 10-5 Performance of the STM-16 optical interface (FEC)

Nominal bit rate 2666057.143 kbit/s

Classification code Ue-16.2c Ue-16.2d Ue-16.2f

Classification code (Note1)

SF16+BA(14dB)+PA

SF16+BA(17dB)+PA

SF16+BA(17dB)+RA+PA


1550.12 nm

Source type SLM SLM SLM

Mean launched power (dBm) (Note2)

13 to 15 15 to 18 15 to 18

Receiver minimum sensitivity (dBm) (Note3)

–37 –37 –42

Minimum overload point (dBm) (Note3)

–10 –10 –10


10 10 10

Note1: The number in the bracket indicates the corresponding parameter, for example, BA (14) indicates that the optical power of the signal after amplified by the BA is 14 dBm. "FEC+BA+PA" indicates that the optical interface specifications include FEC, BA and PA. Note2: The parameter is that of the BA. Note3: The parameter is that of the PA.




Classification code I-64.2 S-64.2b L-64.2b (BA)

Le-64.2 Ls-64.2 V-64.2b (BA +PA+DCU)


1530 ~1565

1530 ~1565

1530 ~1565

1530 ~1565

1530 ~1565 1550.12


–5 to –1 –1 to +2 13 to 15 (Note1)

2 to 4 3 to 7 13 to 15 (Note1)


–14 –14 –14 –21 –21 –26 (Note2)




Classification code I-64.2 S-64.2b L-64.2b (BA)

Le-64.2 Ls-64.2 V-64.2b (BA +PA+DCU)

Minimum overload point (dBm)

–1 –1 –1 –8 –8 –10 (Note2)


8.2 8.2 8.2 8.2 8.2 8.2


500 800 1600 1200 1600 2040

Note1: The parameter is that of the BA. Note2: The parameter is that of the PA.

Table 10-7 shows the performance of the STM-16 and STM-64 fixed wavelength optical interface.

Table 10-7 Performance of the STM-16 and STM-64 fixed wavelength optical interface

Nominal bit rate 2 488 320 kbit/s 2 666 057 kbit/s 9 953 280 kbit/s

Dispersion limit (km) 170 640 640 40


–2 to 3 –5 to –1 –5 to –1 –4 to –1


–28 –28 –28 –14

Minimum overload point (dBm)

–9 –9 –9 –1


3400 10880 10880 800


8.2 10 10 10

Table 10-8 shows the nominal central wavelength and frequency of the STM-16 and STM-64 optical interfaces.

Table 10-8 The central wavelength and frequency of the STM-16 and STM-64 optical interfaces

No. Frequency (THz)

Wavelength (nm)

No. Frequency (THz)

Wavelength (nm)

1 192.1 1560.61 21 194.1 1544.53

2 192.2 1559.79 22 194.2 1543.73




No. Frequency (THz)

Wavelength (nm)

No. Frequency (THz)

Wavelength (nm)

3 192.3 1558.98 23 194.3 1542.94

4 192.4 1558.17 24 194.4 1542.14

5 192.5 1557.36 25 194.5 1541.35

6 192.6 1556.56 26 194.6 1540.56

7 192.7 1555.75 27 194.7 1539.77

8 192.8 1554.94 28 194.8 1538.98

9 192.9 1554.13 29 194.9 1538.19

10 193.0 1553.33 30 195.0 1537.40

11 193.1 1552.52 31 195.1 1536.61

12 193.2 1551.72 32 195.2 1535.82

13 193.3 1550.92 33 195.3 1535.04

14 193.4 1550.12 34 195.4 1534.25

15 193.5 1549.32 35 195.5 1533.47

16 193.6 1548.51 36 195.6 1532.68

17 193.7 1547.72 37 195.7 1531.90

18 193.8 1546.92 38 195.8 1531.12

19 193.9 1546.12 39 195.9 1530.33

20 194.0 1545.32 40 196.0 1529.55

10.2.2 Ethernet Optical Interface The performance of the Ethernet optical interface of the OptiX OSN 3500 conforms to IEEE 802.3z and IEEE 802.3u, as shown in Table 10-9.

Table 10-9 Specifications of Ethernet optical interface

Interface Type

Transmitting optical power (dBm)

Central wavelength (nm)

Receiver overload (dBm)

Receiver sensitivity (dBm)

Extinction ratio (dB)

1000Base-ZX (70 km)

–4 to 2 1480 to 1580

–3 –22 9

1000Base-ZX (40 km)

–2 to 5 1270 to 1355

–3 –23 9



Interface Type

Transmitting optical power (dBm)

Central wavelength (nm)

Receiver overload (dBm)

Receiver sensitivity (dBm)

Extinction ratio (dB)

1000Base-LX(10 km)

–9 to –3 1270 to 1355

–3 –20 9

1000Base-SX (0.55 km)

–10 to –2.5 770 to 860 0 –17 9

100Base-FX (15 km)

–15 to –8 1261 to 1360

–7 –28 10

100Base-FX (2 km)

–19 to –14 1270 to 1380

–14 –30 10

10.2.3 ATM Optical Interface The performance of the ATM optical interface of the OptiX OSN 3500 is shown in Table 10-10.

Table 10-10 Specifications of ATM optical interface

Nominal bit rate 155520 kbit/s 622080 kbit/s

Classification code I-1 S-1.1 L-1.1 S-4.1 L-4.1


1310 1310 1310 1310 1310

Transmission distance (km)

2 15 40 15 40


–19 to –14 –15 to –8 –5 to 0 –15 to –8 –3 to 2


–30 –28 –34 –28 –28


–14 –8 –10 –8 –8


10 8.2 10 8.2 10




10.3 Electrical Interface Performance Table 10-11 shows performance of the PDH electrical interface of the OptiX OSN 3500.

Table 10-11 Performance of the PDH electrical interface

Type 1544 kbit/s 2048 kbit/s 34368 kbit/s

44736 kbit/s

139264 kbit/s

155520 kbit/s

Code pattern B8ZS HDB3 HDB3 B3ZS CMI CMI

Bit rate of signals at output port

Attenuation tolerance at input port

Frequency deviation tolerance at input port

G.703 compliant

G.703 compliant

G.703 compliant

G.703 compliant

Anti-interference capability of input port

G.703 compliant

G.703 compliant

– – – –

10.4 Clock Performance 10.4.1 Clock Interface Type

Table 10-12 shows the clock features of the OptiX OSN 3500.

Table 10-12 Clock features

Clock Feature

External synchronization source

Two inputs, 2048 kbit/s (G.703) or 2048 kHz (G.703), 75 ohm and 120 ohm

Synchronization output Two outputs, 2048 kbit/s (G.703) or 2048 kHz (G.703), 75 ohm and 120 ohm

10.4.2 Timing and Synchronization Performance Table 10-13 lists the timing and synchronization performance of the OptiX OSN 3500.



Table 10-13 Timing and synchronization performance

Output jitter Output frequency of internal oscillator in free-run mode

Long-term phase variation (in locked mode)

G.813 compliant

G.813 compliant G.813 compliant

10.5 Transmission Performance Table 10-14 lists the transmission performance of the OptiX OSN 3500.

Table 10-14 Transmission performance

Jitter at STM-N interface Jitter at PDH interface Bit error

G.813/G.825 compliant G.823/G.783 compliant G.826 compliant

10.6 Timeslot Number The OptiX OSN product supports two types of TU-12 numbering scheme, as shown in Table 10-15 and Table 10-16.

Table 10-15 Numbering of TU-12s in a VC-4 (type I)

TUG2 (7-1) TUG2 (7-2) TUG2 (7-3) TUG (7-4) TUG (7-5) TUG (7-6) TUG (7-7)

TU-3 (3-1)

1 2 3 4 5 6 7 8 9 10

11

12

13

14

15

16

17

18

19

20

21

TU-3 (3-2)

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

TU-3 (3-3)

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63




Table 10-16 Numbering of TU-12s in a VC-4 (type II, ITU-T G.707)

TUG2 (7-1) TUG2 (7-2) TUG2 (7-3) TUG2 (7-4) TUG2 (7-5) TUG2 (7-6) TUG2 (7-7)

TU-3 (3-1)

1 22 43 4 25 46 7 28 49

10

31

52

13

34

55

16

37

58

19

40

61

TU-3 (3-2)

2 23 44 5 26 47 8 29 50

11

32

53

14

35

56

17

38

59

20

41

62

TU-3 (3-3)

3 24 45 6 27 48 9 30 51

12

33

54

15

36

57

18

39

60

21

42

63

10.7 Power Supply Parameters Table 10-17 shows power supply parameters of the OptiX OSN 3500.

Table 10-17 Power supply parameters of the OptiX OSN 3500

Parameter Specification

Power supply mode DC power supply

Nominal voltage –48 V or –60 V

Voltage range –38.4 V to –72V

Power consumption 600 W

10.8 Power Consumption and Weight of Boards Table 10-18 lists the power consumption and weight of the boards of the OptiX OSN 3500.

Table 10-18 Power consumption of boards

Board Power consumption (W)

Weight (kg)


Weight (kg)

N2SL64 32 1.12 N1D12B 1 0.31

N1/N2SL16 20 1.10 N1TSB8 5 0.28

N1/N2SLQ4 16 1.04 N1EGS2 40 1.04

N1/N2SLD4 15 1.01 N2EGS2 43.2 1.04

N1/N2SL4 15 1.00 N1EGT2 23 0.90

N1/N2SLQ1 15 1.04 N1/N2EFS0 35 0.98




Weight (kg)


Weight (kg)

N1/N2SL1 14 1.00 N1EFS4 30 0.98

BA2 20 1.01 N1/N2EMR0 50 1.20

BPA 20 1.01 N1ETF8 2 0.37

DCU 0 0.42 N1EFF8 6 0.44

N1SEP1 17 0.95 N1ADL4 35 0.90

N1EU08 11 0.41 N1ADQ1 37 0.95

N1/N2OU08 6 0.41 N1MST4 40 0.90

N1/N2SPQ4 24 0.91 N2EGR2 54 1.10

N1MU04 2 0.41 N1GXCSA 27 1.81

N1PD3 19 1.12 N1EXCSA 62 2.00

N1PL3 15 1.00 N1UXCSA/B 65 2.00

N1D34S 2 0.38 N1XCE 25 1.50

N1C34S 2 0.31 N1GSCC 10 0.88

N1PQM 22 1.01 N1AUX 19 0.96

N1PQ1 19 1.01 N1FAN 15 x 3 1.50 x 3

N1D75S 5.5 0.35 N1PIU 8 1.15

N1D12S 9 0.35 N1MR2A/C 0 1.01

N1PL3A 15 1.00 N1LWX 30 1.10

N1SLT1 15 1.22 N1ETS8 2.5 0.37

N1SF16 26 1.09 N1EFT8 26 1.01

N1EU04 6 0.40 N1IDQ1 36.6 1.01

N1TSB4 2.5 0.28 N1IDL4 36.6 1.01

N1FANA 30 x 3 1.50 x 3 61COA 10 3.5

62COA 75 8 N1COA 10 3.5




10.9 Electromagnetic Compatibility Table 10-19 lists the EMC test specifications of the OptiX OSN 3500.

Table 10-19 EMC test specifications

Item Standard Result

Radiated Emission CISPR22 Class A EN55022 Class A

Passed

Conducted Emission for DC Ports

CISPR22 Class A EN55022 Class A

Passed

Conducted Emission for Signal Ports

CISPR22 Class A EN55022 Class A

Passed

Immunity to Radiated Electric Field

ETSI EN 300 386 V1.3.2 IEC 61000-4-3(10 V/m)

Passed

Immunity to Electrostatic Discharge

ETSI EN 300 386 V1.3.2 IEC 61000-4-2 (Air Discharge: 8 kV; Contact Discharge:6 kV)

Passed

Immunity to Electrical Fast Transient Bursts for DC Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-4(2kV)

Passed

Immunity to Electrical Fast Transient Bursts for Signal Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-4(2kV)

Passed

Immunity to surges for DC Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-5(4kV)

Passed

Immunity to surges for Signal Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-5(1kV)

Passed

Immunity to Continuous Conducted Interference for DC Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-6(10V)

Passed

Immunity to Continuous Conducted Interference for Signal Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-6(10V)

Passed



10.10 Environmental Specification Table 10-20 lists the environmental specifications with which the OptiX OSN 3500 can run normally for a long term.

Table 10-20 Environmental specifications

Altitude ≤4000 m

Air pressure 70 kPa–106 kPa

Temperature 0 °C–45 °C

Relative humidity 10%–90%

Antiseismic performance

Capable of resisting 7–9 Richter scale earthquake

10.11 Environment Requirement The following international standards are taken as the reference for framing the environment requirements.

n GF 014-95: Environment conditions for the communication equipment room n European telecommunication standards (ETS) 300 019-1-3: Class 3.2 Partly

temperature-controlled locations n NEBS GR-63-CORE: Network equipment-building system (NEBS)

requirements: physical protection

10.11.1 Environment for Storage

Climate

Table 10-21 shows the climate environment required for storing the OptiX OSN 3500.

Table 10-21 Climate environment for storage

Item Range

Altitude ≤5000 m


Temperature –40°C to +70°C

Temperature change rate ≤1°C/min


Solar radiation ≤1120 W/s²




Item Range

Heat radiation ≤600 W/s²

Air speed ≤30 m/s

Waterproof Requirement

(1) Equipment storage requirements at the customer site: Generally, the equipment is stored indoors, where there is no water on the floor and no water leakage on the packing boxes of the equipment.

(2) The equipment should not be stored in places where leakage is probable, such as near the auto firefighting and heating facilities.

(3) If the equipment is required to be stored outdoors, the following four conditions should be met at the same time:

n The packing boxes are intact. n Necessary rainproof measures should have been taken to prevent rainwater

from entering the packing boxes. n There is no water on the ground where the packing boxes are stored, let alone

water entering into the packing boxes. n The packing boxes are not directly exposed to the sun.

Biological Environment n Avoid multiplication of microbe, such as eumycete and mycete. n Avoid rodentia animals such as mice.

Air Cleanness n There is no explosive, electric-conductive, magnetic-conductive or corrosive

duct. n The density of the mechanical active substances complies with the

requirements listed in Table 10-22.

Table 10-22 Density for mechanical active substances

Mechanical active substance Content

Suspending dust ≤5.00 mg/m³

Precipitable dust ≤20.0 mg/m²·h

Gravel ≤300 mg/m³



n The density of the chemical active substances complies with the requirements listed in Table 10-23.

Table 10-23 Density for chemical active substances

Chemical active substance Content

SO2 ≤0.30 mg/m³

H2S ≤0.10 mg/m³

NO2 ≤0.50 mg/m³

NH3 ≤1.00 mg/m³

Cl2 ≤0.10 mg/m³

HCl ≤0.10 mg/m³

HF ≤0.01 mg/m³

O3 ≤0.05 mg/m³

Mechanical Stress

Table 10-24 Requirements for mechanical stress

Item Sub-item Range

Acceleration spectral density

1 m²/s³ -3 dBA - Random vibration

Frequency range 5Hz–20 Hz

20Hz–200 Hz

-

Impact response spectrum II ≤300 m/s², 11ms Non-steady impact

Static load 0 kPa

Note: Static load: The pressure from upside, that the equipment with package can endure when the equipment is piled as per stipulation.

10.11.2 Environment for Transportation

Climate

Table 10-25 shows the climate environment required for transporting the OptiX OSN 3500.




Table 10-25 Climate environment for transportation

Item Range

Altitude ≤5000 m


Temperature -40 °C to +70 °C

Temperature change rate ≤3 °C/min


Solar radiation ≤1120 W/s²

Heat radiation ≤600 W/s²

Air speed ≤30 m/s

Waterproof Requirement

The following conditions should be met during the transportation:

n The packing boxes are intact. n Necessary rainproof measures should be taken for the means of transport to

prevent rainwater from entering the packing boxes. n There is no water in the means of transportation.







Suspending dust No requirement

Precipitable dust ≤3.0 mg/m²·h







SO2 ≤0.30 mg/m³

H2S ≤0.10 mg/m³

NO2 ≤0.50 mg/m³

NH3 ≤1.00 mg/m³

Cl2 ≤0.10 mg/m³

HCl ≤0.10 mg/m³

HF ≤0.01 mg/m³

O3 ≤0.05 mg/m³

Mechanical Stress


Item Sub-item Range

Acceleration spectral density

1 m²/s³ -3 dBA - Random vibration

Frequency range 5Hz–20 Hz 20Hz–200 Hz

-

Impact response spectrum II

≤300 m/s², 11ms Non-steady impact

Static load 0 kPa

10.11.3 Environment for Operation

Climate

Table 10-29 and Table 10-30 show the required climate environment in which the OptiX OSN 3500 operates.




Table 10-29 Requirements for temperature and humidity

Temperature Relative humidity Equipment name

Long-term operation

Short-term operation

Long-term operation

Short-term operation

0°C to 45°C -5°C to +55°C 10% to 90% 5% to 95%

Note: The temperature and humidity values are obtained 1.5 m above the floor and 0.4 m in front of the equipment. Short-term operation means the consecutive working time of the equipment does not exceed 96 hours, and the accumulated working time every year does not exceed 15 days.

Table 10-30 Other climate requirements

Item Range

Altitude ≤4000 m


Temperature change rate ≤5°C/h

Air speed ≤1 m/s







Dust particle ≤3 × 105 particles/m³

Suspending dust ≤0.4 mg/m³

Precipitable dust ≤15 mg/m²·h








SO2 ≤0.20 mg/m³

H2S ≤0.006 mg/m³

NH3 ≤0.05 mg/m³

Cl2 ≤0.01 mg/m³

HCl ≤0.10 mg/m³

HF ≤0.01 mg/m³

O3 ≤0.005 mg/m³

CO ≤5.0 mg/m³

Mechanical Stress


Item Sub-item Range

velocity ≤5mm/s -

Acceleration - ≤2 m/s2

Sinusoidal vibration

Frequency range 5Hz–62 Hz 62Hz–200 Hz

Impact response spectrum II

Half-sina wave, ≤300 m/s², 11ms Impact

Static load 0

Note: Static load: The pressure from upside, that the equipment with package can endure when the equipment is piled as per stipulation.

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01-OSN 3500 System Description

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