01-osn 2500 system description

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OptiX OSN 2500

Technical Manual - System Description Contents

T2-040237-20060320-C-1.50 Huawei Technologies Proprietary i

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

2.4 110 V/220 V Power Supply..........................................................................................................2-3

2.5 Clock............................................................................................................................................2-3

2.6 Protection .....................................................................................................................................2-3

2.6.1 Equipment Level Protection...............................................................................................2-3

2.6.2 Network Level Protection...................................................................................................2-3

2.6.3 Adjustable MS Bandwidth..................................................................................................2-3

2.6.4 Squelching Function in Multiplex Section .........................................................................2-3

2.7 TCM.............................................................................................................................................2-3

2.8 NM Information Interworking .....................................................................................................2-3

2.8.1 Interworking at Physical Layer ..........................................................................................2-3

2.8.2 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

4.2.2 SDH Processing Board.......................................................................................................4-3

4.2.3 PDH Processing Board.......................................................................................................4-3


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Contents

OptiX OSN 2500

Technical Manual - System Description

ii Huawei Technologies Proprietary T2-040237-20060320-C-1.50

4.2.4 Data Processing Board .......................................................................................................4-3

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

5.1 Overview......................................................................................................................................5-3

5.2 NE Software.................................................................................................................................5-3

5.3 Board Software ............................................................................................................................5-3

5.4 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 .........................................................................................................................6-36.2.3 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

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


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OptiX OSN 2500

Technical Manual - System Description Contents

T2-040237-20060320-C-1.50 Huawei Technologies Proprietary iii

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 the SCC Unit, Cross-Connect Unit and Timing Unit ........................8-3

8.1.3 1+1 Hot Backup for the Power Input Unit .........................................................................8-38.1.4 1+1 Protection for ATM Boards .........................................................................................8-3

8.1.5 Protection for the Wavelength Conversion Unit.................................................................8-3

8.1.6 1:N Protection for the +3.3 V Board Power Supply...........................................................8-3

8.1.7 Intelligent Fans ...................................................................................................................8-3

8.1.8 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 OptiX OSN 2500 REG....................................................................................................... 10-3

10.1 Function ...................................................................................................................................10-3

10.2 System Configuration ..............................................................................................................10-3

10.2.1 Hardware Configuration.................................................................................................10-3

10.2.2 Board and Slot ................................................................................................................10-3

10.2.3 Fiber Connection ............................................................................................................10-3

11 Technical Specifications .................................................................................................. 11-3

11.1 Interface Type...........................................................................................................................11-3

11.2 Optical Interface Performance .................................................................................................11-3

11.2.1 SDH Optical Interface ....................................................................................................11-3

11.2.2 Ethernet Optical Interface...............................................................................................11-3

11.2.3 ATM Optical Interface....................................................................................................11-3

11.3 Electrical Interface Performance..............................................................................................11-311.4 Clock Performance...................................................................................................................11-3

11.4.1 Clock Interface Type.......................................................................................................11-3

11.4.2 Timing and Synchronization Performance .....................................................................11-3

11.5 Transmission Performance.......................................................................................................11-3

11.6 Timeslot Number......................................................................................................................11-3

11.7 Power Supply Parameters ........................................................................................................11-3


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iv Huawei Technologies Proprietary T2-040237-20060320-C-1.50

11.8 Power Consumption and Weight of Boards .............................................................................11-3

11.9 Electromagnetic Compatibility ................................................................................................11-3

11.10 Environmental Index..............................................................................................................11-3

11.11 Environment Requirement .....................................................................................................11-3

11.11.1 Environment for Storage...............................................................................................11-311.11.2 Environment for Transportation....................................................................................11-3

11.11.3 Environment for Operation...........................................................................................11-3


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OptiX OSN 2500

Technical Manual - System Description Figures

T2-040237-20060320-C-1.50 Huawei Technologies Proprietary v

Figures

Figure 1-1Appearance of the OptiX OSN 2500...............................................................................1-3

Figure 1-2Application of the OptiX OSN 2500 in the network .......................................................1-3

Figure 2-1Access capacity of each slot before division of the three slots........................................2-3

Figure 2-2Access capacity of each slot after division of the three slots...........................................2-3

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

Figure 2-4The NM information of the third party equipment is transparently transmitted .............2-3

Figure 2-5The NM information transparently transmitted by the third party equipment.................2-3

Figure 2-6The NM information of the third party equipment is transparently transmitted .............2-3

Figure 2-7Transparent transmission of NM information by the third party equipment (OSI) .........2-3

Figure 2-8Transparent transmission of NM information of third party equipment (OSI) ...............2-3

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

Figure 3-2Structure of the OptiX OSN 2500 subrack......................................................................3-3

Figure 4-1System architecture of the OptiX OSN 2500 ..................................................................4-3

Figure 4-2Slot layout before division of the slots ............................................................................4-3

Figure 4-3Slot layout after division of the slots...............................................................................4-3

Figure 5-1Software system structure of the OptiX OSN 2500.........................................................5-3

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

Figure 6-2The EVPL service port +VLAN......................................................................................6-3

Figure 6-3The EVPL service............................................................................................................6-3

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

Figure 6-5Application of EVPLAN service .....................................................................................6-3Figure 6-6LCAS adjusts bandwidth dynamically ............................................................................6-3

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

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

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

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


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Figures

OptiX OSN 2500


vi Huawei Technologies Proprietary T2-040237-20060320-C-1.50

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

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

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

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

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

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

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

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

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

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

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

Figure 7-3End-to-end service configuration ....................................................................................7-3Figure 7-4Trail restoration ...............................................................................................................7-3

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

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

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

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

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

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

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

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

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

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

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

Figure 10-1Functional block diagram of the REG.........................................................................10-3

Figure 10-2Hardware configuration of the REG............................................................................10-3

Figure 10-3Fiber connection when there is one REG....................................................................10-3

Figure 10-4Fiber connection when there are multiple REGs.........................................................10-3


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OptiX OSN 2500

Technical Manual - System Description Tables

T2-040237-20060320-C-1.50 Huawei Technologies Proprietary ix

Table 11-27Density for chemical active substances .......................................................................11-3

Table 11-28Requirements for mechanical stress ............................................................................11-3

Table 11-29Requirements for temperature and humidity...............................................................11-3

Table 11-30Other climate requirements ......................................................................................... 11-3

Table 11-31Density for mechanical active substances ...................................................................11-3

Table 11-32Density for chemical active substances .......................................................................11-3

Table 11-33Requirements for mechanical stress ............................................................................11-3


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OptiX OSN 2500

Technical Manual - System Description 1 Network Application

T2-040237-20060320-C-1.50 Huawei Technologies Proprietary 1-1

1 Network ApplicationThis chapter describes application of the OptiX OSN 2500 in the transmission

network.

The OptiX OSN 2500 is new generation equipment developed by Huawei

Technologies Co., Ltd (hereinafter referred to as Huawei). The OptiX OSN 2500integrates 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 Storage area network (SAN)

n Digital video broadcasting (DVB)

Figure 1-1 shows the appearance of the OptiX OSN 2500.


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1 Network Application

OptiX OSN 2500


1-2 Huawei Technologies Proprietary T2-040237-20060320-C-1.50

Figure 1-1Appearance of the OptiX OSN 2500

Figure 1-2 shows how the OptiX OSN 2500 is applied in the transmission network.

The OptiX OSN 2500 is mainly used at the convergence layer and the access layer

of the MAN. It can interconnect with the following equipments.

n OptiX OSN 9500

n OptiX OSN 7500

n OptiX OSN 3500

n OptiX OSN 1500


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OptiX OSN 2500

Technical Manual - System Description 1 Network Application


OptiX OSN 9500

Backbone layer

OptiX OSN 3500OptiX OSN 7500



Convergence layer

Access layer

GSM/CDMA/WCDMA

Ethernet SANPSTN ATM. . .

Figure 1-2Application of the OptiX OSN 2500 in the network


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OptiX OSN 2500

Technical Manual - System Description 2 Functions


2 FunctionsThis chapter introduces the functions of the OptiX OSN 2500 as follows.

n Capacity

n

Interfacen Built-in WDM Technology

n 110 V/220 V Power Supply

n Clock

n Protection

n TCM

n NM Information Interworking

2.1 Capacity

2.1.1 Cross-Connect CapacityTable 2-1 shows the cross-connect capacity of the OptiX OSN 2500.

Table 2-1Cross-connect capacity

Cross-connect andtiming board Higher ordercross-connect

capacity

Lower ordercross-connectcapacity

Access capacity

Q1CXL1 20 Gbit/s (128 x

128 VC-4)

5 Gbit/s (32 x 32

VC-4)

18.75 Gbit/s(120 x

120 VC-4)


128 VC-4)

5 Gbit/s (32 x 32

VC-4)

18.75 Gbit/s (120 x

120 VC-4)


128 VC-4)

5 Gbit/s (32 x 32

VC-4)

18.75 Gbit/s (120 x

120 VC-4)


128 VC-4)

20 Gbit/s (128 x

128 VC-4)

18.75 Gbit/s (120 x

120 VC-4)


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Cross-connect andtiming board Higher ordercross-connect

capacity

Lower ordercross-connectcapacity

Access capacity

Q2CXL4 20 Gbit/s (128 x128 VC-4)

20 Gbit/s (128 x128 VC-4)

18.75 Gbit/s (120 x120 VC-4)

Q2CXL16 20 Gbit/s (128 x128 VC-4)

20 Gbit/s (128 x128 VC-4)

18.75 Gbit/s (120 x120 VC-4)

2.1.2 Access Capacity of Slots

Slots 5, 6 and 7 in the OptiX OSN 2500 subrack can be divided into smaller slots as

needed. Figure 2-1 and Figure 2-2 give the access capacity of each slot before and

after division of the three slots, respectively.

Fibre routing

S

L

O

T9

S

L

O

T10

S

L

O

T13

S

L

O

T14

S

A

P

S

L

O

T

1

5

S

L

O

T

1

6

S

L

O

T

1

7

S

L

O

T

1

8

S

L

O

T

1

S

L

O

T

2

S

L

O

T

3

S

L

O

T

4

S

L

O

T12

S

L

O

T8

S

L

O

T11

PIU

SLOT22

PIU

SLOT23

FAN

SLOT25

FAN

SLOT24

S

L

O

T5

S

L

O

T6

S

L

O

T7

622Mbit/s

622Mbit/s

2.5

Gbit/s

2.5

Gbit/s

1.2

5Gbit/s

2.5

Gbit/s

2.5

Gbit/s

2.5

Gbit/s

2.5

Gbit/s

Figure 2-1Access capacity of each slot before division of the three slots


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OptiX OSN 2500



Fibre routing

S

L

O

T9

S

L

O

T10

S

L

O

T13

S

L

O

T14

S

A

P

S

LOT

1

5

S

LOT

1

6

S

LOT

1

7

S

LOT

1

8

S

LOT

1

S

LOT

2

S

LOT

3

S

LOT

4

S

L

O

T12

S

L

O

T8

S

L

O

T11

PIU

SLOT22

PIU

SLOT23

FAN

SLOT25

FAN

SLOT24

2.5

Gbit/s

2.5

Gbit/s

1.2

5Gbit/s

2.5

Gbit/s

S

1

9

S

2

0

S

2

1

62

2Mbit/s

62

2Mbit/s

1.25Gbit/s

S

5

S

6

S

7

622Mbit/s

622Mbit/s

1.2

5Gbit/s

2.5

Gbit/s

2.5

Gbit/s

Figure 2-2Access capacity of each slot after division of the three slots

2.1.3 Service Access Capability

The capacity of services that the OptiX OSN 2500 can access varies with the type

and quantity of the configured boards. Table 2-2 lists the maximum capacity of the

OptiX OSN 2500 for accessing different services.

Table 2-2Maximum service access capacity

Service type Maximum access ports of a singlesubrack

STM-16 standard or concatenated services 6

STM-4 standard or concatenated services 24

STM-1 standard services 74

STM-1 (electrical) services 38

E4 services 16

E3/T3 services 33

E1/T1 services 252

Fast Ethernet (FE) services 80Gigabit Ethernet (GE) services 14

STM-4 ATM services 7

STM-1 ATM services 28

Enterprise systems connection (ESCON) 26


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OptiX OSN 2500



Service type Maximum access ports of a singlesubrack

Fibre channel (FC50) 20

Fibre connection (FICON)/FC100 9

FC200 9

Digital video broadcast asynchronous serialinterface (DVB-ASI)

4

Note: The OptiX OSN 2500 only supports one of the maximum access capacities listed above at a time.

2.2 Interface

2.2.1 Service Interface

The service interfaces of the OptiX OSN 2500 are shown in Table 2-3.

Table 2-3The service interfaces

Interface DescriptionSDH serviceinterface

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(CXL16 can not provide L-16.2Je, V-16.2Je,U-16.2Je interface)

STM-16 optical interfaces: support fixed wavelength output, sothey can directly interconnect with WDM equipment

STM-16 optical interfaces (out-of-band FEC): Ue-16.2c,Ue-16.2d, Ue-16.2f

PDH service

interface75/120 ohm E1 electrical interface

100 ohm T1 electrical interface

75 ohm E3, T3 and E4 electrical interfaces

Ethernet service

interface

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

1000Base-ZX

ATM service

interface

STM-1 ATM optical interface: Ie-1, S-1.1, L-1.1

STM-4 ATM optical interface: S-4.1, L-4.1

E3 ATM interface: accessed by the PD3/PL3/PL3A board

IMA E1 interface: accessed by the PQ1/PQM/R1PD1 board

Storage areanetwork (SAN)

service interface

FC50, FC100/FICON, FC200, ESCON service optical interface


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OptiX OSN 2500



Interface DescriptionVideo service

interfaceDVB-ASI service optical interface

&Note

Ue-16.2c, Ue-16.2d, Ue-16.2f, Le-64.2, Ls-16.2, L-16.2Je, V-16.2Je, U-16.2Je,

Ve-1.2, Ve-4.2 are technical specifications defined by Huawei.

2.2.2 Administration and Auxiliary Interfaces

The administration and auxiliary interfaces of the OptiX OSN 2500 are shown in

Table 2-4.

Table 2-4The administration and auxiliary interfaces

Interface DescriptionAdministrationinterface

One RS-232 remote maintenance interface (OAM)

Four broadcast data interfaces (S1-S4)

One 64 kbit/s codirectional data path interface (F1)

Ethernet network management (NM) interface (ETH)

One administration serial interface (F&f)

Orderwire

interfaceOne orderwire phone interface

Two SDH network node interface (NNI) voice interfaces.Clock interface Two 75 ohm external clock interfaces (2048 kbit/s or 2048 kHz)

Two 120 ohm external clock interfaces (2048 kbit/s or 2048 kHz)

Alarm interface Eight alarm input interfaces

Four alarm output interfaces

Four cabinet alarm indicator output interfaces

Concatenated alarm interface


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2 Functions

OptiX OSN 2500



2.3 Built-in WDM Technology

The OptiX OSN 2500 provides MR2 board and LWX board to implement built-in

WDM technology. There are three types of the MR2 board.

n MR2A boardn MR2B board

n MR2C board

They are identical in function but installed in different slots. These boards have thefollowing characteristics.

n The MR2 board adds or 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 optical terminal multiplexer (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 optical add/drop

multiplexer (OADM) station adding/dropping two channels of signals.

n The LWX board converts client-side signals into ITU-T G.692 (DWDM)

compliant standard wavelength signals and transmit the signals transparently.

n The LWX board provides 3R function to client-side uplink/downlink signals

(at the rate of 10 Mbit/s2.7 Gbit/s), performs clock recovery and monitors its

rate.

n Two types of LWX board are available: one is single-fed single receiving, and

the other is dual-fed signal selection.n The dual-fed signal selection LWX board supports intra-board protection,

realizing 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.

2.4 110 V/220 V Power Supply

The OptiX OSN 2500 supports the 110 V/220 V power supply through

uninterrupted power module (UPM). The UPM is used to convert 110 V/220 V AC

into 48 V DC, to provide power supply for the OptiX OSN 2500. A UPM consists

of power boxes and storage batteries. The output power of each UPM is 2 x 270 W.

The power box measures 438 mm (W) x 240 mm (D) x 44 mm (H). The OptiX OSN

2500 needs two power boxes. The storage battery of the OptiX OSN 2500 consists

of four 12 V-40 Ah storage batteries. The dimensions of each battery are 197 mm x

165 mm x 170 mm. If the AC fails, the storage battery can sustain four hours.


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2 Functions

OptiX OSN 2500



Items protected Protection scheme

+3.3 V board power supply 1:N centralized backup protection

2.6.2 Network Level Protection

The OptiX OSN 2500 supports the following protection:

n Four-fibre multiplex section protection (MSP) ring

n Two-fibre multiplex section protection (MSP) ring

n Linear MSP

n MS-shared protection ring

n Sub-network connection protection (SNCP)

Table 2-6 shows the maximum number of MS rings protection supported by the

OptiX OSN 2500.

Table 2-6The maximum number of MS rings protection supported by the OptiX OSN 2500

Protection scheme Max. number of MS rings protectionsupported

STM-16 four-fiber MS ring

protection1

STM-16 two-fiber MS ring protection 3

STM-4 four-fiber MS ring protection 5

STM-4 two-fiber MS ring protection 10

2.6.3 Adjustable MS Bandwidth

In terms of MSP, the OptiX OSN 2500 supports bandwidth adjustment by VC-4,

that is, for an STM-16 ring, its MS bandwidth can change from one VC-4 to eight

VC-4s.

2.6.4 Squelching Function in Multiplex Section

Each protection time slot in multiplex section protection ring is shared by 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, 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 nodes failure, traffic from

working channel may contend for the time slot of protection channel carrying extra

traffic. This also brings misconnection.


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To prevent misconnection, every node of the OptiX OSN 2500 has a detailed

connection table. Every node knows the source point and endpoint of each VC-12,

VC-3, or VC-4 (VC-12 or VC-3 connections must have the same source point and

endpoint). 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 2500 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 point and endpoint.

2.7 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 and N2SL16 boards support

TCM at higher level.

2.8 NM Information Interworking

2.8.1 Interworking at Physical Layer

NM Information Transparently Transmitted by a Third Party Equipment

The DCC consists of two parts:

n D1D3 bytes, forming a 192 kbit/s channel

n D4D12 bytes, forming a 576 kbit/s channel

Currently, only the D1D3 bytes are used. The D4D12 bytes are reserved for

higher management requirements.

When there is a third party equipment between the OptiX OSN 2500 systems, the

bytes D4D12 will be used by the third party equipment to transmit the NM

information, as shown in Figure 2-3.


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2 Functions

OptiX OSN 2500



Third partyequipment


D1-D3 D1-D3

Transparent

transmission

Figure 2-3NM 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 can be transmitted by bytesD4D12 of the OptiX OSN 2500, as shown in Figure 2-4.

Third party

equipment

Third party

equipment

D1-D3 D1-D3Transparent

transmission

Figure 2-4The NM information of the third party equipment is transparently transmitted

2.8.2 Interworking at Network Layer

IP Over DCC

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

IP over DCC has two networking topologies as shown in Figure 2-5 Figure 2-6.


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OptiX OSN 2500



Third party

equipment

Third party

equipment

IP over DCC

Figure 2-5The NM information transparently transmitted by the third party equipment

Third party

equipment

Third party

equipment

IP over DCC

Third party

equipment

Third party

equipment

Figure 2-6The 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.

n

One is the NM information of the OptiX OSN 2500 is transparentlytransmitted by the third party equipment through OSI over DCC, as shown in

Figure 2-7.

n The other is the NM information of the third party equipment is transparently

transmitted by the OptiX OSN 2500, as shown in Figure 2-8.


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2 Functions

OptiX OSN 2500



Third party

equipment

Third party

equipment

OSI Over DCC

OSI protocol

stack

OSI protocl

stack

OSI protocol

stack

Figure 2-7Transparent transmission of NM information by the third party equipment (OSI)

Third party

equipment

Third party

equipment

OSI Over DCC


Third party

equipment

OSI protocol

stack

OSI protocol

stack

OSI protocol

stack

Figure 2-8Transparent transmission of NM information of third party equipment (OSI)


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OptiX OSN 2500

Technical Manual - System Description 3 Hardware


3 HardwareThis chapter describes the hardware structure of the OptiX OSN 2500, including

the appearance and parameters of the cabinet, and the subrack structure. It covers:

n Cabinet

n Subrack

3.1 Cabinet

The OptiX OSN 2500 can be installed in the ETSI cabinet or a 19 inch standard

cabinet. Table 3-1 shows the technical parameters of the ETSI cabinet. Figure 3-1

shows how the ETSI cabinet looks.

Table 3-1Technical parameters of the ETSI cabinet

Size (mm) Weight (kg) The number of configuredsubrack

600 (W) x 300 (D) x 2000 (H) 55 2

600 (W) x 600 (D) x 2000 (H) 79 2

600 (W) x 300 (D) x 2200 (H) 60 3

600 (W) x 600 (D) x 2200 (H) 84 3

600 (W) x 300 (D) x 2600 (H) 70 4

600 (W) x 600 (D) x 2600 (H) 94 4

Table 3-2Technical parameters of the 19 inch standard cabinet

Size (mm) Weight (kg)

600 (W) x 600 (D) x 2000 (H) 90

600 (W) x 600 (D) x 2200 (H) 110


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3 Hardware

OptiX OSN 2500



W

H

D

Figure 3-1Appearance of the ETSI cabinet


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OptiX OSN 2500

Technical Manual - System Description 3 Hardware


3.2 Subrack

The size of the OptiX OSN 2500 subrack is 472 mm (H) x 447 mm (W) x 295 mm

(D). A single empty subrack weighs 17 kg. The structure of OptiX OSN 2500

subrack is shown in Figure 3-2.

2

3

4

5

1

W

H

D

1. Auxiliary interface area 2. Interface board area 3. Processing board area

4. PIU area 5. Fan area

Figure 3-2Structure of the OptiX OSN 2500 subrack


30/123


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OptiX OSN 2500

Technical Manual - System Description 4 Boards


4 BoardsThis chapter introduces the board types of the OptiX OSN 2500, and the slots in

which they can be installed. It includes two sections:

n Type

n Slot

4.1 Type

The OptiX OSN 2500 consists of the following units.

n SDH interface unit

n PDH interface unit

n Ethernet interface unit

n Cross-Connect unit

n Timing unit

n SCC unit

n Overhead processing unit

n Auxiliary interface unit

Figure 4-1 shows the system architecture of the OptiX OSN 2500, while Table 4-1

shows the constituent boards and functions of each unit.


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4 Boards

OptiX OSN 2500



PDH/Ethernet/A

TM

InterfaceUnit

STM-N OpticalSignal

PDH Signal

Ethernet Signal

ATM Signal

CrossConne

ct

Matrix

SDH

Interfac

e

Unit

Overhead

Processing

Unit

Synchronous

timingUnit

Auxiliary

InterfaceUnit

SCC

Unit

Figure 4-1System architecture of the OptiX OSN 2500

Table 4-1Constituent boards and functions of units

Unit Constituent board Function

Processing

board

SL16, SF16,

SLQ4, SLD4,SL4, SLT1, SLQ1,

SL1, R1SLD4,R1SL4, R1SLQ1,

R1SL1, SEP1

Interface board EU08, OU08,

EU04

SDH

interfaceunit

Protectionswitching

board

TSB8, TSB4

Access and process

STM-1/STM-4/STM-16 opticalsignals and VC4-4c/VC4-16c

concatenated signals; Access andprocess STM-1 electrical signals,

and conduct TPS protection forthem.

Processing

board

SPQ4, PD3, PL3,

PL3A, PQ1, PQM,

R1PD1

Interface board MU04, D34S,

D75S, D12S,D12B

PDH

interface

unit

Protection

switching

board

TSB8, TSB4

Access and process E1, E1/T1,

E3/T3 and E4/STM-1 electrical

signals, and conduct TPSprotection for them.

Processing

board

EGS2, EGT2,

EFS0, EFS4,EFT8, EFT4

Access and process

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

signals.

Ethernet

interfaceunit

Interface board ETS8 (SupportTPS), ETF8, EFF8

Access 10/100Base-TX,100Base-FX Ethernet signals.


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OptiX OSN 2500



Unit Constituent board Function

Processing

boardEMR0, EGR2 Access and process

1000Base-SX/LX/ZX,

100Base-FX, 10/100Base-TX

signals. Support resilient packetring.

Resilient

Packet

ring unit

Interface board ETF8, EFF8 Access 10/100Base-TX,

100Base-FX Ethernet signals.

ATM interface unit ADL4, ADQ1,

IDL4, IDQ1

Access and process STM-4,

STM-1 and E3 ATM signals.

SAN interface unit MST4 Access and transparently transmitSAN service, video service.

MR2A, MR2B,MR2C

Add/drop and multiplex any twoadjacent wavelengths.

WDM unit

LWX Realize the wavelength conversionbetween X-rate client wavelength

and ITU-T G.692 standard

wavelength.

SDH cross-connect matrixunit

Synchronous timing unit

SCC unit

SDH interface unit

Q1CXL16,Q1CXL4,

Q1CXL1,

Q2CXL16,

Q2CXL4,Q2CXL1

Integrate STM-1/STM-4/STM-16line processing unit, cross-connect

unit, timing unit and SCC unit.

System auxiliary processunit

Overhead processing unit

SAP Provide orderwire phone,inter-board communication andPMU functions.

Power input unit PIU, UPM Access power supply and protect

the equipment against abnormal

power. UPM can transform 110V/220 V AC into 48 V DC.

Extended interface board SEI Provide the system auxiliary

interface.

Fan unit FAN Dissipate heat for the system.

Optical booster amplifierboard

BA2, BPA,61COA, 62COA,

N1COA

Amplify and pre-amplify theoptical power.


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4 Boards

OptiX OSN 2500



4.2 Slot

4.2.1 Slot Layout

Figure 4-2 and Figure 4-3 show the slot layout of the OptiX OSN 2500.

Fibre routing

CXL1/4/16

CXL1/4/16

SA

P

PIUSLOT22

PIUSLOT23

FANSLOT25

FANSLOT24

S

5

S

6

S

7

S1

S2

S3

S4

S8

S9

S1

0

S1

1

S1

5

S1

6

S1

7

S1

8

S1

2

S1

3

S1

4

Figure 4-2Slot layout before division of the slots

Fibre routing

CXL1/4/16

CXL1/4/16

SA

P

PIUSLOT22

PIUSLOT23

FANSLOT25

FANSLOT24

S

1

9

S

2

0

S

2

1

S

5

S

6

S

7

S

1

S

2

S

3

S

4

S

8

S

9

S

1

0

S

1

1

S

1

5

S

1

6

S

1

7

S

1

8

S

1

2

S

1

3

S

1

4

Figure 4-3Slot layout after division of the slots

Table 4-2 shows the MSP paired slots of the OptiX OSN 2500.

Table 4-2MSP Paired slots of the OptiX OSN 2500

Cross connect capacity Paired slots

Before division of the

slots

(slot 6, slot 13), (slot 7, slot 12) , (slot 8, slot 11) , (slot 9, slot

10)


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OptiX OSN 2500



Cross connect capacity Paired slots

After division of the

slots

(slot 5, slot 19) , (slot 6, slot 20) , (slot 7, slot 21) , (slot 8, slot

11) , (slot 9, slot 10)

Table 4-3 shows the correspondence between the slots for interface boards and

those for processing boards.

Table 4-3Correspondence between the slots for processing boards and those for interfaceboards

Before division of slot After division of slot

Slot forprocessing board

Slot forcorrespondinginterface board

Slot forprocessingboard

Slot for correspondinginterface board

Slot 6 Slot 1, 2 Slot 6 2




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 4-4SDH processing boards and their available slots

Board Full name Slots Outlet mode Interface type Connector

SL16 1 x STM-16 optical

interface board

Slots 78,

1112

Led out from

the frontpanel

Support fixed

wavelength outputand I-16, S-16.1,

L-16.1, L-16.2,L-16.2Je, V-16.2Je,U-16.2Je

LC

SF16 1 x STM-16 optical

interface board (withFEC)

Slots 78,

1112

Led out from

the frontpanel

Support fixed

wavelength outputand Ue-16.2c,

Ue-16.2d, Ue-16.2f

LC

SLQ4 4 x STM-4 optical

interface board

Slots 78,

1112

Led out from

the frontpanel

I-4, S-4.1, L-4.1,

L-4.2, Ve-4.2

LC


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4 Boards

OptiX OSN 2500




SLD4 2 x STM-4 optical

interface board

Slots 78,

1113

Led out from

the front

panel

I-4, S-4.1, L-4.1,

L-4.2, Ve-4.2

LC

SL4 1 x STM-4 opticalinterface board

Slots 58,1113

Led out fromthe front

panel

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

LC

SLT1(Not

e1)

12 x STM-1 optical

interface board

Slots 58,

1113

Led out from

the front

panel

I-1, S-1.1, L-1.1,

L-1.2, Ve-1.2LC

SLQ1 4 x STM-1 opticalinterface board

Slots 58,1113


panel

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

LC

SL1 1 x STM-1 optical

interface board

Slots 58,

1113

Led out from

the front

panel

I-1, S-1.1, L-1.1,

L-1.2, Ve-1.2LC

R1SLD4 2 x STM-4 optical

interface board(half-height)

Slots 7, 21 Led out from

the frontpanel

I-4, S-4.1, L-4.1,

L-4.2, Ve-4.2

LC

R1SL4 1 x STM-4 optical

interface

board(half-height)

Slots 57,

1921

Led out from

the front

panel

I-4, S-4.1, L-4.1,

L-4.2, Ve-4.2

LC

R1SLQ1 4 x STM-1 optical

interfaceboard(half-height)

Slots 57,

1921

Led out from

the frontpanel

I-1, S-1.1, L-1.1,

L-1.2, Ve-1.2

LC

R1SL1 1 x STM-1 opticalinterface

board(half-height)

Slots 57,1921


panel

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

LC

SEP1

(Note2)

2 x STM-1 electricalprocessing board

Slots 58,1113


panel

75 ohm STM-1electrical interface

SMB

SEP

(Note2)

8 x STM-1 electrical

processing board

Slots 67,

1213

Led out from

the interface

board

S-1.1 optical

interface and 75 ohm

STM-1 electricalinterface

LC, SC and

SMB

BA2 Optical boosteramplifier board Slots 58,1113 Led out fromthe front

panel

NA

LC

BPA Optical booster &

pre-amplifier board

Slots 58,

1113

Led out from

the frontpanel

NA LC


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OptiX OSN 2500




61COA Case shaped EDFA

optical amplifier unitExternal Led out from

the front

panel

NA SC

62COA Case shaped ramanamplifier unit

External Led out fromthe front

panel

NA SC, E2000

N1COA Case shaped

preamplifier unitExternal Led out from

the front

panel

NA SC

MR2A 2-channel opticaladd/drop multiplexing

board

Slots 58,1113


panel

NA LC

MR2B 2-channel optical

add/drop multiplexing

board

Slots 57,

1921

Led out from

the front

panel

NA LC

MR2C 2-channel optical

add/drop multiplexingboard

Slots 14,

1518

Led out from

the frontpanel

NA LC

LWX Arbitrary bit rate

wavelength

conversion unit

Slots 58,

1113

Led out from

the front

panel

NA LC

CXL16

(Note3)

STM-16 optical

interface,cross-connect, timing

and SCC unit

Slots 9, 10 From the

front panel

I-16, S-16.1, L-16.1

and L-16.2

LC

CXL4(Note3)

STM-4 opticalinterface,

cross-connect, timing

and SCC unit

Slots 9, 10 From thefront panel

S-4.1, L-4.1, L-4.2and Le-4.2

LC

CXL1

(Note3)

STM-1 s optical

interface,cross-connect, timing

and SCC unit

Slots 9, 10 From the

front panel

S-1.1, L-1.1, L-1.2

and Le-1.2

LC

Note1: If SLT1 is inserted in Slot 5 or 6, only four optical interfaces can be used. If N1SLT1 is inserted in Slot

8, only eight optical interfaces can by used.

Note 2: The N1SEP1 and N1SEP are the boards of the same type. They 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 3: The CXL is a line, system control, cross-connect and timing board of the OptiX OSN 2500. It seats in

slot 9 and slot 10. On the T2000, it is displayed as three board types: CXL, SCC and SL1/4/16, respectively

occupying the logic slots 8081, 8283 and 910.


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4 Boards

OptiX OSN 2500



&Note

One OptiX OSN 2500 subrack can configure one 61COA, N1COA or 62COA.

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

Board Full name Slots available Interface type Companion board

N1EU08 8 x STM-1 electrical

interface board

3, 15, 17 SMB Used together with the

N1SEP

N1OU08 8 x STM-1 optical

interface board

3, 15, 17 LC Used together with the

N1SEP

N2OU08 8 x STM-1 opticalinterface board

3, 15, 17 SC Used together with theN1SEP

N1EU04 4 x STM-1 electrical

interface board

1, 3, 15, 17 SMB Used together with

N1SEP

N1TSB8 8 x electrical interface

switching & bridging

board

1, 17 None Used together with the

N1SEP and

N1EU08/N1EU04

N1TSB4 4 x electrical interfaceswitching & bridging

board

1, 17 None Used together withN1SEP and N1EU04

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 4-6The 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

Slots 67, 1213 Led out from the

interface board

75 ohm E4/STM-1

electrical interfaceSMB

PD3 6 x E3/T3processing board

Slots 67, 1213 Led out from theinterface board

75 ohm E3/T3electrical interface

SMB

PL3 3 x E3/T3

processing boardSlots 67, 1213 Led out from the

interface board

75 ohm E3/T3


PL3A 3 x E3/T3

processing boardSlots 58, 1113 Led out from the

front panel

75 ohm E3/T3


PQ1 63 x E1 processingboard

Slots 57, 1213 Led out from theinterface board

120 ohmand 75ohm E1 interface

DB44


39/123


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4 Boards

OptiX OSN 2500



&Note

The numbers in the bracket behind the slots means the maximum bandwidth of the

board after inserted in the corresponding slot.

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

Board Full name Slots Outlet mode Interface type ConnectorN1EGS2 2-port Gigabit Ethernet

switching processing board

with Lanswitch

78, 1113

(1.25 Gbit/s)

Led out from thefront panel

1000BASE-SX/LX/ZX

LC

5, 6

(622 Mbit/s)

N2EGS2 2-port Gigabit Ethernet

switching processing boardwith Lanswitch

78, 1112

(2.5 Gbit/s)

Led out from the

front panel

1000BASE-S

X/LX/ZXLC

N1EFS0 Fast Ethernet processing

board with Lanswitch

67, 1213

(622 Mbit/s)

Led out from the

interface board

10/100BASE-

TX,

100BASE-FX

RJ-45, LC

6(622 Mbit/s)N2EFS0 Fast Ethernet processingboard with Lanswitch

7, 12,13

(1.25 Gbit/s)

Led out from theinterface board

10/100BASE-TX,

100BASE-FX

RJ-45, LC

N1EFS4 4-port 10/100 Mbit/s fast

Ethernet processing board

with Lanswitch

58, 1113

(622 Mbit/s)

Led out from the

front panel

10/100BASE-

TX

RJ-45

5, 6(622Mbit/s)

78, 1112

(2.5 Gbit/s)

N1EGT2 2-port Gigabit Ethernettransparent transmission

board

13(1.25Gbit/s)


1000BASE-SX/LX/ZX

LC

5, 6(622

Mbit/s)

8-port 100M Fast Ethernet

transparent transmissionboard(no interface board)

78, 1113

(1.25 Gbit/s)

Led out from the

front panel

10/100Base-T

XRJ-45N1EFT8

16-port 100M Fast Ethernettransparent transmission

board(interface board)

7, 12 ,13

(1.25 Gbit/s)

Led out from thefront panel and

interface board

10/100Base-TX,

100Base-FX

RJ-45, LC


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OptiX OSN 2500



Board Full name Slots Outlet mode Interface type Connector5, 6, 19, 20

(622 Mbit/s)

R1EFT4 4-port 100M Fast Ethernet

transparent transmission

board

7, 21(2.5Gbit/s)

Led out from the

front panel

10/100Base-T

XRJ-45

5, 6(622

Mbit/s)

78, 1112

(2.5 Gbit/s)

4x 10/100 Mbit/s

electrical-port and 1 x 1000Mbit/s optical-port RPR

processing board

13(1.25Gbit/s)

Led out from the

front panel

10/100BASE-

TX,100BASE-FX

,1000BASE-S

X/LX/ZX

RJ-45, LC

6(622 Mbit/s)

7, 12(2.5

Gbit/s)

N1/N2

EMR0

12 x 10/100 Mbit/selectrical-port and 1 x 1000

Mbit/s optical-port RPRprocessing board

13

(1.25 Gbit/s)

Led out from thefront panel and

interface board

10/100BASE-TX,

100BASE-FX,1000BASE-S

X/LX/ZX

RJ-45, LC

5, 6(622

Mbit/s)

78, 1112

(2.5 Gbit/s)

N2EGR2 2-port GE processing board

with RPR function

13(1.25

Gbit/s)

Led out from the

front panel

1000Base-SX

/LX/ZXLC

N1ADL4 1 x STM-4 ATM processing

board58, 1113

(1.25 Gbit/s)

Led out from the

front panel

S-4.1, L-4.1,

L-4.2, Ve-4.2LC

N1ADQ1 4 x STM-1 ATM processingboard

58, 11-13

(1.25 Gbit/s)


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

Ve-1.2

LC

5, 6(622

Mbit/s)

N1IDL4 1 x STM-4 ATM service

processing board with IMA

78, 1113

(1.25 Gbit/s)

Led out from the

front panel

S-4.1, L-4.1,

L-4.2, Ve-4.2

LC

5, 6(622Mbit/s)

N1IDQ1 4 x STM-1 ATM serviceprocessing board with IMA

78, 1113

(1.25 Gbit/s)


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

Ve-1.2

LC

N1MST4 4 x multi-service (SAN,

Video) transparent

5, 6(622

Mbit/s)

Led out from the

front panel

LC


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4 Boards

OptiX OSN 2500



Board Full name Slots Outlet mode Interface type Connector78, 1112

(2.5 Gbit/s)

transmission board

13(1.25Gbit/s)

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

Board Full name Slots available Interface type Companion board

ETF8 8 x 10/100 Mbit/s Ethernet

twisted pair interface boardSlots 1, 3, 15, 17 RJ-45 Used with EFS0, EMR0

and EFT8

EFF8 8 x 100 Mbit/s Ethernet

optical interface boardSlots 1, 3, 15, 17 LC Used with EFS0, EMR0

and EFT8

ETS8 8 x 10/100 Mbit/s Ethernetinterface switching board

Slots 1, 3, 15, 17 RJ-45 Used together withN2EFS0 and EMR0

TSB8 8 x PDH interface switching& bridging board

Slots 1, 17 NA Used together withN2EFS0 and ETS8


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OptiX OSN 2500

Technical Manual - System Description 5 Software


5 Software5.1 Overview

The software system of the OptiX OSN 2500 is of modular structure, as shown in

Figure 5-1. The software system include three modules: board software, NEsoftware and NM software, respectively run on various boards, SCC board and NM

computer for corresponding functions.

NM software

Board Software

NE Software

Figure 5-1Software system structure of the OptiX OSN 2500

5.2 NE Software

The NE software is used to manage, monitor and control the operation of the boards

of an NE. Through the NE software, the communication unit between the NMsystem and boards, the NM system can control and manage NEs. According to

ITU-T Recommendation M.3010, the NE software belongs to the unit management

layer in the telecommunication management network, implementing the functions

including NE functions, some of coordination functions and operating system

functions of the network unit layer. The data communication function implements

the communication between the NE and other equipment (including coordinated

equipment, NM system, and other NEs).


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5 Software

OptiX OSN 2500



n Real-time multi-task operating system

The function of the real-time multi-task operating system of the OptiX OSN 2500

NE software is to manage public resources and provide support for the executive

program. It can provide an executive environment unrelated to processor hardware

by segregating the application from the processor.n Network side (NS) module

The NS module is 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 and security management

module.

n Equipment administration module (AM)

The equipment AM is the kernel of the NE software for implementing NE

management. It includes Manager and Agent. Administrator can send networkmanagement 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 SCC board, the communication

module transmits the OAM&P information and exchanges management

information between the NM system and NEs, and between NEs themselves. It

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.

5.3 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 and alarm events.


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Technical Manual - System Description 5 Software


Its specific functions include: alarm management, performance management,

configuration management and communication management and so on. It can

directly control the functional circuits in corresponding boards and implement

ITU-T compliant specific functions of the NE.

The board software can be classified into the following types: line software ortributary software, cross-connect software, clock software and orderwire software.

5.4 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 implement monitoring and management over the

network equipment.

The NM software runs on a workstation or PC, managing the equipment and thetransmission network. It enables the user 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.


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6 Data Features

OptiX OSN 2500



6 Data FeaturesThis chapter introduces the data features provided by the OptiX OSN 2500. It

covers:

n Ethernet

n RPR

n ATM

n SAN

6.1 Ethernet

This section introduces the Ethernet features of the OptiX OSN 2500 in terms of

function, application and protection.

6.1.1 Function

The OptiX OSN 2500 provides the Ethernet boards EFS4, EFS0, EGS2. EGT2,EFT8 and EFT4 to meet different Ethernet service requirements. Table 6-1 and

Table 6-2 list the basic functions of these boards.

Table 6-1The 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

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 N1ETS8

(cooperatingwith TSB8 to

realize 1:1TPS), ETF8,

EFF8

None None


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Technical Manual - System Description 6 Data Features



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

JUMBO frame Supported, 9600 bytes

Maximum uplinkbandwidth

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

Mapping mode 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)


(x"63),VC-3-xv

(x"12)


(x"63),VC-3-xv

(x"12)


(x"63),VC-3-xv

(x"12)

Number of

VCTRUNKs12 12 24 24 48

Ethernet private line

(EPL)Supported Supported Supported Supported Supported

Ethernet virtual private

line (EVPL)Supported Supported Supported Supported Supported

Ethernet private LAN

(EPLAN)Supported Supported Supported Supported Supported

Ethernet virtual private

LAN (EVPLAN)

Supported Supported Supported Not

Supported

Supported

Static MPLS label Supports

MartiniOE

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 Supported Supported Supported Not

Supported

Supported

Rapid spanning tree

protocol (RSTP)Supported Supported Supported Supported Supported

Multicast (IGMP

Snooping)

Supported Supported Supported Not

Supported

Supported

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

LCAS (Link Capacity

Adjustment Scheme)

Supported,

compliantwith ITU-T

7042

Supported,

compliantwith ITU-T

7042

Supported,

compliantwith ITU-T

7042

Not

Supported

Supported,

compliantwith ITU-T

7042


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6 Data Features

OptiX OSN 2500




Port aggregation (in

one board)Supported Supported Supported Supported Supported

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

Link state pass through

(LPT)

Supported Supported Supported Supported Supported

Flow control Supported, compliant with IEEE802.3X

Test frame Supported Supported Supported Supported Supported

Ethernet performancemonitoring

Supported Supported Supported Supported Supported

Table 6-2The function list of EGT2, EFT8 and EFT4

Function EGT2 EFT8 EFT4

Number ofports

2 x GE 16 x FE 4 x FE

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

1000Base-ZX

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

10Base-T,100Base-TX

Used withinterface board

None Support 8 x FE if notused with the interface

board; support 16 x FE ifused with interface

boards ETF8 and EFF8.

None

Service frame

format

Ethernet II, IEEE

802.3, IEEE

802.1QTAG

Ethernet II, IEEE 802.3,

IEEE 802.1QTAG

Ethernet II,

IEEE 802.3,

IEEE802.1QTAG

JUMBO frame Supports, 9600 bytes Supports, 9600 bytes Supports, 9600bytes

Uplinkbandwidth

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

Mapping mode 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)

VC-12, VC-3,

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

Number ofVCTRUNKs

2 16 4


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OptiX OSN 2500



Function EGT2 EFT8 EFT4

Ethernet

service type

Support EPL, not

EVPL,

EPLAN and EVPLAN

Support EPL, not EVPL,

EPLAN and EVPLAN

Support EPL,

not EVPL,

EPLAN and

EVPLAN

Static MPLS

labelNot supports Not supports Not supports

VLAN Transparent

transmission

Transparent

transmission

Transparent

transmission

Encapsulation

format

GFP, LAPS, HDLC GFP, LAPS, HDLC GFP, LAPS,

HDLC

LPT Not Supports Not Supports Not Supports

LCAS ITU-T G.7042 ITU-T G.7042 ITU-T G.7042

CAR Not supports Not supports Not supports

Flow control IEEE 802.3X IEEE 802.3X IEEE 802.3X

Test frame Supports Supports Supports

Ethernet

performance

monitoring

Supports Supports Supports

6.1.2 Application

The OptiX OSN 2500 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 service. 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.


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6 Data Features

OptiX OSN 2500



SHR

1

3

4

5

Traffic flown

NE 4

NE 1

NE 2

NE 3

2

Figure 6-1The 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 Company A

and B. Up to two priorities can be set according to the flow classification result. For

security purpose, the OptiX OSN 2500 isolates services of different users by VLAN.

In the figure below, VLAN 1 of Company A shares a VCTRUNK with VLAN 11 of

Company B, VLAN 2 of Company A shares a VCTRUNK with VLAN 12 of

Company B, and VLAN 3 of Company A shares a VCTRUNK with VLAN 13 of

Company B.

All services of Company A are converged to NE1 and 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 2

VLAN 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 6-2The EVPL service port +VLAN


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OptiX OSN 2500



EVPL Service

The OptiX OSN 2500 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 will search 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 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 2500 integrates the function of P

equipment and PE equipment.

Corp A

Company B Company B

NE1 NE4NE2 NE3

Port A

Port B

Port A

Port B

Tunnel Label VC Label DataCompany

60 10 ...A

70 20 ...B

... ... ......

60 10 Data

70 20 Data

61 10 Data

71 20 Data

10 Data

20 Data

Tunnel label

switching

Tunnel label

switching

Tunnel label

switching

NE4 strips the MPLS lables

and Transfers the frame tocorresponding ports

L2 MPLS network composedby OptiX OSN Products

Company ACompany A

62

72

Figure 6-3The EVPL service

EPLAN Service

The OptiX OSN 2500 supports Layer 2 switching of Ethernet data. For example,

the EPLAN service, which can be transferred according to their destination media

access control (MAC) addresses.

As shown in Figure 6-4, respective 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 may want to communicate

with users of Company A connecting to other three NEs. That is, the flow direction

of services is not definite. The Ethernet Layer 2 switching function provided by the

OptiX OSN 2500 can be employed to solve such a problem. For example, an

Ethernet MAC address transfer table will be 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 will be 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. In addition, the corresponding maintenance and management

becomes convenient for the operator.


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6 Data Features

OptiX OSN 2500



Company A Company B

NE1

Company A

Company B

Company ACompany B

Company A

Company B

MAC Addr ess VC-Tr unk

MAC 1 NE1 MAC 2 NE4 !MAC 3 NE2 "

NE2

NE3

NE41

23

SHR

n Traffic flow

Figure 6-4Layer 2 switching of Ethernet service

EVPLAN Service

The OptiX OSN 2500 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 can be

converged. As shown in Figure 6-5, when the users Ethernet frame (the source

address is MAC H, and the destination address is MAC A, B or C) enters the PE

equipment, the system will search the Layer 2 transfer table for the internal label

(VC label). Then, the frame is transferred to the corresponding tunnel, where it is

attached with 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 striped. After that, the Ethernet frame is transferred to the corresponding

output port according to the Layer 2 MAC transfer table.


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OptiX OSN 2500



Branch CP

Branch A

Headquarters

Branch B

PE

PE

01-osn 2500 system description

Documents