osn 550 v100r006c01 hardware description 01

OptiX OSN 550 Multi-Service CPE OpticalTransmission SystemV100R006C01

Hardware Description

Issue 01Date 2012-10-31

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2012. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.comEmail: [email protected]

Issue 01 (2012-10-31) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

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About This Document

Product VersionThe following table lists the product versions applicable to this documentation.

Product Name Product VersionOptiX OSN 550 V100R006C01iManager U2000 V100R008C00

Intended AudienceThis document describes the OptiX OSN 550 in terms of hardware architecture, boards, cables.This document is intended for:l Network planning engineersl Hardware installation engineers

Symbol ConventionsThe symbols that may be found in this document are defined as follows.

Symbol DescriptionAlerts you to a high risk hazard that could, if not avoided,result in serious injury or death.

Alerts you to a medium or low risk hazard that could, if notavoided, result in moderate or minor injury.

Alerts you to a potentially hazardous situation that could, ifnot avoided, result in equipment damage, data loss,performance deterioration, or unanticipated results.Provides a tip that may help you solve a problem or save time.

OptiX OSN 550 Multi-Service CPE Optical TransmissionSystemHardware Description About This Document


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Symbol DescriptionProvides additional information to emphasize or supplementimportant points in the main text.

GUI ConventionsConvention MeaningBoldface Buttons, menus, parameters, tabs, window, and dialog titles are

in boldface. For example, click OK.> Multi-level menus are in boldface and separated by the ">" signs.

For example, choose File > Create > Folder.

Change HistoryChanges between document issues are cumulative. The latest document issue contains all thechanges made in earlier issues.

Updates in Issue 01 (2012-10-31) Based on Product Version V100R006C01This document is the first issue for product version V100R006C01. Compared with issue 1 ofproduct version V100R006C00, this issue incorporates the following updates:l Added the 1x10GE Ethernet processing board EX1.l Added the 4xchannelized STM-1 service processing board CQ1.l Optimized the "Functions and Features" section of the system control, switching, and

timing board.l Optimized the "Functions and Features" sections of the packet processing boards.

Updates in Issue 01 (2012-04-30) Based on Product Version V100R006C00This issue is used for first office application (FOA).

OptiX OSN 550 Multi-Service CPE Optical TransmissionSystemHardware Description About This Document


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Contents

About This Document.....................................................................................................................ii1 Chassis.............................................................................................................................................12 Boards and Their Appearances...................................................................................................5

2.1 Board List...........................................................................................................................................................62.2 Board Appearance............................................................................................................................................14

3 System Control, Switching, and Timing Boards...................................................................183.1 PCX..................................................................................................................................................................19

3.1.1 Version Description.................................................................................................................................193.1.2 Functions and Features............................................................................................................................203.1.3 Working Principle and Signal Flow........................................................................................................363.1.4 Front Panel...............................................................................................................................................403.1.5 DIP Switches and CF Card......................................................................................................................423.1.6 Valid Slots...............................................................................................................................................453.1.7 Feature Code............................................................................................................................................463.1.8 Technical Specifications..........................................................................................................................47

3.2 CXL..................................................................................................................................................................583.2.1 Version Description.................................................................................................................................583.2.2 Functions and Features............................................................................................................................593.2.3 Working Principle and Signal Flow........................................................................................................613.2.4 Front Panel...............................................................................................................................................643.2.5 DIP Switches and CF Card......................................................................................................................663.2.6 Valid Slots...............................................................................................................................................693.2.7 Feature Code............................................................................................................................................693.2.8 Technical Specifications..........................................................................................................................70

4 Packet Processing Boards...........................................................................................................774.1 EF8F.................................................................................................................................................................78

4.1.1 Version Description.................................................................................................................................784.1.2 Functions and Features............................................................................................................................784.1.3 Working Principle and Signal Flow........................................................................................................824.1.4 Front Panel...............................................................................................................................................844.1.5 DIP Switches and Jumpers......................................................................................................................854.1.6 Valid Slots...............................................................................................................................................85

OptiX OSN 550 Multi-Service CPE Optical TransmissionSystemHardware Description Contents


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4.1.7 Feature Code............................................................................................................................................854.1.8 Technical Specifications..........................................................................................................................85

4.2 EM6T/EM6F....................................................................................................................................................874.2.1 Version Description.................................................................................................................................874.2.2 Functions and Features............................................................................................................................884.2.3 Working Principle and Signal Flow........................................................................................................934.2.4 Front Panel...............................................................................................................................................954.2.5 DIP Switches and Jumpers......................................................................................................................984.2.6 Valid Slots...............................................................................................................................................984.2.7 Feature Code............................................................................................................................................984.2.8 Technical Specifications..........................................................................................................................98

4.3 EG4C..............................................................................................................................................................1054.3.1 Version Description...............................................................................................................................1054.3.2 Functions and Features..........................................................................................................................1054.3.3 Working Principle and Signal Flow......................................................................................................1104.3.4 Front Panel.............................................................................................................................................1124.3.5 DIP Switches and Jumpers....................................................................................................................1154.3.6 Valid Slots.............................................................................................................................................1154.3.7 Feature Code..........................................................................................................................................1154.3.8 Technical Specifications........................................................................................................................115

4.4 EX1.................................................................................................................................................................1214.4.1 Version Description...............................................................................................................................1214.4.2 Functions and Features..........................................................................................................................1214.4.3 Working Principle and Signal Flow......................................................................................................1264.4.4 Front Panel.............................................................................................................................................1284.4.5 DIP Switches and Jumpers....................................................................................................................1294.4.6 Valid Slots.............................................................................................................................................1294.4.7 Feature Code..........................................................................................................................................1294.4.8 Technical Specifications........................................................................................................................129

4.5 MD1................................................................................................................................................................1314.5.1 Version Description...............................................................................................................................1314.5.2 Functions and Features..........................................................................................................................1314.5.3 Working Principle and Signal Flow......................................................................................................1344.5.4 Front Panel.............................................................................................................................................1364.5.5 DIP Switches and Jumpers....................................................................................................................1394.5.6 Valid Slots.............................................................................................................................................1394.5.7 Feature Code..........................................................................................................................................1394.5.8 Technical Specifications........................................................................................................................139

4.6 CQ1.................................................................................................................................................................1404.6.1 Version Description...............................................................................................................................1404.6.2 Functions and Features..........................................................................................................................1404.6.3 Working Principle and Signal Flow......................................................................................................143



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4.6.4 Front Panel.............................................................................................................................................1464.6.5 DIP Switches and Jumpers....................................................................................................................1474.6.6 Valid Slots.............................................................................................................................................1474.6.7 Feature Code..........................................................................................................................................1474.6.8 Technical Specifications........................................................................................................................147

5 SDH Boards................................................................................................................................1505.1 SL1D...............................................................................................................................................................151

5.1.1 Version Description...............................................................................................................................1515.1.2 Functions and Features..........................................................................................................................1515.1.3 Working Principle and Signal Flow......................................................................................................1525.1.4 Front Panel.............................................................................................................................................1545.1.5 DIP Switches and Jumpers....................................................................................................................1555.1.6 Valid Slots.............................................................................................................................................1555.1.7 Feature Code..........................................................................................................................................1555.1.8 Technical Specifications........................................................................................................................156

5.2 SL1Q...............................................................................................................................................................1585.2.1 Version Description...............................................................................................................................1585.2.2 Functions and Features..........................................................................................................................1585.2.3 Working Principle and Signal Flow......................................................................................................1605.2.4 Front Panel.............................................................................................................................................1625.2.5 DIP Switches and Jumpers....................................................................................................................1635.2.6 Valid Slots.............................................................................................................................................1635.2.7 Feature Code..........................................................................................................................................1635.2.8 Technical Specifications........................................................................................................................164

5.3 SL4D...............................................................................................................................................................1665.3.1 Version Description...............................................................................................................................1665.3.2 Functions and Features..........................................................................................................................1665.3.3 Working Principle and Signal Flow......................................................................................................1685.3.4 Front Panel.............................................................................................................................................1705.3.5 DIP Switches and Jumpers....................................................................................................................1715.3.6 Valid Slots.............................................................................................................................................1715.3.7 Feature Code..........................................................................................................................................1715.3.8 Technical Specifications........................................................................................................................172

6 PDH Boards................................................................................................................................1756.1 SP3D...............................................................................................................................................................176

6.1.1 Version Description...............................................................................................................................1766.1.2 Functions and Features..........................................................................................................................1766.1.3 Working Principle and Signal Flow......................................................................................................1766.1.4 Front Panel.............................................................................................................................................1796.1.5 DIP Switches and Jumpers....................................................................................................................1826.1.6 Valid Slots.............................................................................................................................................1826.1.7 Feature Code..........................................................................................................................................182



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6.1.8 Technical Specifications........................................................................................................................1826.2 PL3T...............................................................................................................................................................184


7 EoS Boards..................................................................................................................................1897.1 EFS8...............................................................................................................................................................190


7.2 EGT1..............................................................................................................................................................1977.2.1 Version Description...............................................................................................................................1977.2.2 Functions and Features..........................................................................................................................1977.2.3 Working Principle and Signal Flow......................................................................................................1997.2.4 Front Panel.............................................................................................................................................2017.2.5 DIP Switches and Jumpers....................................................................................................................2027.2.6 Valid Slots.............................................................................................................................................2027.2.7 Feature Code..........................................................................................................................................2027.2.8 Technical Specifications........................................................................................................................202

8 WDM Board................................................................................................................................2068.1 DMD2.............................................................................................................................................................207


9 Auxiliary Boards........................................................................................................................2129.1 AUX................................................................................................................................................................213



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9.2 FAN................................................................................................................................................................2219.2.1 Version Description...............................................................................................................................2229.2.2 Functions and Features..........................................................................................................................2229.2.3 Working Principle and Signal Flow......................................................................................................2229.2.4 Front Panel.............................................................................................................................................2239.2.5 Valid Slots.............................................................................................................................................2249.2.6 Technical Specifications........................................................................................................................225

10 Power Boards............................................................................................................................22610.1 UPM..............................................................................................................................................................227

10.1.1 Version Description.............................................................................................................................22710.1.2 Functions and Features........................................................................................................................22710.1.3 Working Principle and Signal Flow....................................................................................................22810.1.4 Front Panel...........................................................................................................................................22910.1.5 Valid Slots...........................................................................................................................................23110.1.6 Technical Specifications......................................................................................................................231

10.2 PIU................................................................................................................................................................23210.2.1 Version Description.............................................................................................................................23210.2.2 Functions and Features........................................................................................................................23310.2.3 Working Principle and Signal Flow....................................................................................................23310.2.4 Front Panel...........................................................................................................................................23410.2.5 Valid Slots...........................................................................................................................................23610.2.6 Technical Specifications......................................................................................................................236

10.3 APIU.............................................................................................................................................................23610.3.1 Version Description.............................................................................................................................23610.3.2 Functions and Features........................................................................................................................23610.3.3 Working Principle and Signal Flow....................................................................................................23710.3.4 Front Panel...........................................................................................................................................23810.3.5 Valid Slots...........................................................................................................................................23910.3.6 Technical Specifications......................................................................................................................239

11 Outdoor Cabinet......................................................................................................................24012 Filler Panel................................................................................................................................243

12.1 Functions......................................................................................................................................................24412.2 Appearance and Valid Slots.........................................................................................................................244



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13 Optical Attenuators.................................................................................................................24614 Pluggable Optical Modules...................................................................................................248

14.1 Overview......................................................................................................................................................24914.2 SFP/eSFP Optical/Electrical Modules..........................................................................................................25014.3 XFP Optical Modules...................................................................................................................................25414.4 CWDM/DWDM...........................................................................................................................................255

15 Pluggable electrical Modules................................................................................................26916 Cables.........................................................................................................................................271

16.1 Fiber Jumper.................................................................................................................................................27316.2 DC Power Cable...........................................................................................................................................27416.3 AC Power Cable...........................................................................................................................................27516.4 UPM Power Cable........................................................................................................................................27516.5 PGND Cable.................................................................................................................................................27716.6 STM-1 Cable................................................................................................................................................27716.7 16xE1/T1 Cable............................................................................................................................................27816.8 21xE1/T1 Cable............................................................................................................................................28216.9 E3/T3 Cable..................................................................................................................................................28716.10 Network Cable............................................................................................................................................288

17 Parameter Settings...................................................................................................................293A Glossary......................................................................................................................................294



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1 ChassisThe OptiX OSN 550 is a 2U chassis. It can be deployed in a variety of scenarios and on severaldifferent types of cabinets and surfaces.

Chassis Structure

OptiX OSN 550 Multi-Service CPE Optical TransmissionSystemHardware Description 1 Chassis


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Chassis Structure and Board Installation Area

Board installation

area

SLOT9

(PIU)

SLOT 7 (CST/CSH)

SLOT 1 (EXT )

SLOT 5 (EXT)

SLOT 3 (EXT)

SLOT 2 (EXT )

SLOT 4 (EXT)

SLOT 6 (EXT)

SLOT 8 (CST/CSH)SLOT10

(PIU) SLOT11

(FAN)SLOT92

(PIU)

SLOT 7

SLOT 1 (EXT)

SLOT 5 (EXT)SLOT 3 (EXT)

SLOT 2 (EXT)SLOT 4 (EXT)SLOT 6 (EXT)

SLOT 8SLOT91(PIU) SLOT93

(FAN)

Power supply boardsSystem control, switching, and timing boards

Extended boardsFan board

12

34

1

23

4

W

H

D

NOTE

An OptiX OSN 550 NE can automatically save its NE ID, extended ID, IP address, and subnet mask to itsbackplane. After a new system control, switching, and timing board replaces an original one, the NEautomatically uses the saved information. Therefore, you do not need to set the NE ID, extended ID, IPaddress, and subnet mask for the substitute board.

Installation ModeThe equipment can be deployed in a variety of scenarios and on several different types of cabinetsand surfaces. such as in an ETSI or 19-inch cabinet, APM30H outdoor cabinet, or open rack, oron a wall or desk.

Label DescriptionTable 1-1 provides the description of the labels on the chassis and boards. Actual labels mayvary depending on the configurations of the chassis and boards.



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Table 1-1 Description of labelsLabel Label Name Description

ESD protection label Indicates that theequipment issensitive to staticelectricity.

Grounding label Indicates thegrounding positionof the chassis.

Fan warning label Warns you not totouch fan leaveswhen the fan isrotating.

Power caution label Instructs you toread relatedinstructions beforeperforming anypower-relatedtasks.

CLASS1LASER

PRODUCT

Laser safety classlabel

The laser safetyclass label CLASS1 indicates that themaximum opticalpower of theoptical port is lessthan 10 dBm (10mW).

/ QUALIFICATION CARD

MADE IN CHINAHUAWEI TECHNOLOGIES CO.,LTD.

HUAWEI

Qualification cardlabel

Indicates that theequipment hasbeen qualitychecked.

50RoHS label Indicates that the

equipmentcontains certainhazardoussubstancesspecified in theRoHS directive.The equipmentneeds to berecycled after theenvironment-friendly use periodof 50 years expires.



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Label Label Name Descriptionl DC power

l AC power

Product nameplatelabel

Indicates theproduct name andcertification.

Technical SpecificationsTable 1-2 lists the technical specifications of an OptiX OSN 550 chassis.

Table 1-2 Technical specifications of an OptiX OSN 550 chassisItem PerformanceDimensions (H x W x D) 88 mm x 442 mm x 220 mm (H x W x D)Weight (empty chassis with abackplane)

3.5 kg (net weight of a chassis that contains one fan boardand two PIU boards)

Power consumption l Maximum power consumption: 240 Wl Typical power consumption: 149 W



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2 Boards and Their AppearancesAbout This Chapter

This chapter lists the following types of boards that the OptiX OSN 550 supports: system control,switching, and timing boards, packet processing boards, SDH boards, PDH boards, auxiliaryboards, power supply boards, and fan boards. This chapter also provides the appearances of theseboards.

2.1 Board ListThis section describes the boards that the equipment supports. The equipment provides variousfunctions with different boards inserted.2.2 Board AppearanceThis section describes the appearances, dimensions, and bar codes of boards.

OptiX OSN 550 Multi-Service CPE Optical TransmissionSystemHardware Description 2 Boards and Their Appearances


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2.1 Board ListThis section describes the boards that the equipment supports. The equipment provides variousfunctions with different boards inserted.

Slot LayoutFigure 2-1 shows the slot layout in an OptiX OSN 550 NE.

Figure 2-1 Slot layout in an OptiX OSN 550 NE

SLOT9 SLOT 1

(EXT )

SLOT 5 (EXT)SLOT 3 (EXT)

SLOT 2 (EXT )

SLOT 4 (EXT)

SLOT 6 (EXT)

SLOT 8 (CST/CSH)10(PIU)

SLOT11(FAN)Slot 92

(PIU)

Slot 7 (System control, switching, and timing boards)

Slot 1 (EXT)

Slot 5 (EXT)Slot 3 (EXT)

Slot 2 (EXT)Slot 4 (EXT)Slot 6 (EXT)

Slot 8 (System control, switching, and timing boards)Slot 91

(PIU)Slot 93

(FAN)

Board ListTable 2-1 lists the boards that the OptiX OSN 550 supports.



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Table 2-1 Boards that the OptiX OSN 550 supportsBoardClassification

BoardAcronym

BoardName

Port Type ValidSlot

Systemcontrol,switching,and timingboard(Hybrid)

TNM1PCXLX

The cross-connect,timing,systemcontrol, andline boardsupports:l A packet

switchingcapacityof 60Gbit/s

l A higherordercross-connectcapacityof 20Gbit/sand alowerordercross-connectcapacityof 5 Gbit/s

l One10GE andone STM-N ports

l Systemcommunicationandcontrol

l One Ethernet NM port/NM serialport (sharing one RJ45 port)

l One STM-1/STM-4/STM-16small form-factor pluggable(SFP) optical/electrical port. Theoptical port type can be S-1.1,L-1.1, L-1.2, S-4.1, L-4.1, L-4.2,S-16.1, L-16.1, or L-16.2. STM-1ports support SFP electricalmodules.

l One 10GE XFP optical port:10GBASE-SR (LAN),10GBASE-SW (WAN),10GBASE-LR (LAN),10GBASE-LW (WAN),10GBASE-ER (LAN),10GBASE-EW (WAN),10GBASE-ZR (LAN), or10GBASE-ZW (WAN)

Slots 7 and8



7

BoardClassification

BoardAcronym

BoardName

Port Type ValidSlot

TNM1PCXX




l One10GEport



l One 10GE XFP optical port:10GBASE-SR (LAN),10GBASE-SW (WAN),10GBASE-LR (LAN),10GBASE-LW (WAN),10GBASE-ER (LAN),10GBASE-EW (WAN),10GBASE-ZR (LAN), or10GBASE-ZW (WAN)

Slots 7 and8



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BoardClassification

BoardAcronym

BoardName

Port Type ValidSlot

TNM1PCXLG




l One GEand oneSTM-Nports



l One STM-1/STM-4/STM-16small form-factor pluggable(SFP) optical/electrical port. Theoptical port type can be S-1.1,L-1.1, L-1.2, S-4.1, L-4.1, L-4.2,S-16.1, L-16.1, or L-16.2. STM-1ports support SFP electricalmodules.

l One GE SFP optical port:1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX

Slots 7 and8



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BoardClassification

BoardAcronym

BoardName

Port Type ValidSlot

TNM1PCXGA




l One GEport




Slots 7 and8



10

BoardClassification

BoardAcronym

BoardName

Port Type ValidSlot

TNM1PCXGB




l One GEport




Slots 7 and8

Systemcontrol,switching,and timingboard(TDM)

TNM1CXL1

The cross-connect,timing,systemcontrol, andline boardsupports:l A higher

ordercross-connectcapacity


l One STM-1 SFP optical/electrical port. The optical porttype can be S-1.1, L-1.1, or L-1.2.STM-1 ports support SFPelectrical modules.

Slots 7 and8

TNM1CXL4


l One STM-4 SFP optical port ofthe S-4.1, L-4.1, or L-4.2 type

Slots 7 and8



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BoardClassification

BoardAcronym

BoardName

Port Type ValidSlot

TNM1CXL16

of 20Gbit/sand alowerordercross-connectcapacityof 5 Gbit/s



l One STM-16 SFP optical port ofthe S-16.1, L-16.1, or L-16.2 type

Slots 7 and8

Packetprocessingboard

TNM1MD1

32xsmart E1serviceprocessingboard

75/120-ohm E1 port Slots 1 to 6

TNM1EM6T

6xRJ45 FE/GEprocessingboard

l Four FE electrical ports:10/100BASE-T(X)

l Two GE electrical ports (they canserve as FE electrical ports):1000BASE-T

Slots 1 to 6

TNM1EM6F

4xRJ45 and2xSFP FE/GEprocessingboard

l Four FE electrical ports:10/100BASE-T(X)

l Two GE/FE SFP optical/electrical ports: 1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX/1000Base-T/100BASE-BX/100BASE-FX/100BASE-LX/100BASE-VX/100BASE-ZX

Slots 1 to 6

TNM1EG4C

4xGE (SFP/RJ45)processingboard

l Four GE electrical ports:1000BASE-T

l Four GE/FE SFP optical ports:1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX/100BASE-BX/100BASE-FX/100BASE-LX/100BASE-VX/100BASE-ZX

Slots 3 to 6



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BoardClassification

BoardAcronym

BoardName

Port Type ValidSlot

TNM1EF8F

8xFEprocessingboard

l Eight FE SFP optical ports:100BASE-BX/100BASE-FX/100BASE-LX/100BASE-VX/100BASE-ZX

Slots 1 to 6

TNM1EX1

1x10GEprocessingboard

One 10GE XFP optical port:10GBASE-SR (LAN), 10GBASE-SW (WAN), 10GBASE-LR (LAN),10GBASE-LW (WAN), 10GBASE-ER (LAN), 10GBASE-EW (WAN),10GBASE-ZR (LAN), or10GBASE-ZW (WAN)

Slots 1 and2

TNM1CQ1

4-portchannelizedSTM-1serviceprocessingboard

l Four STM-1 SFP optical/electrical ports of the S-1.1,L-1.1, or L-1.2 optical type or ofSFP electrical modules

Slots 1 to 6

SDH board TNH2SL1D

2xSTM-1interfaceboard

Two STM-1 SFP optical/electricalports. The optical port type can beS-1.1, L-1.1, or L-1.2. STM-1 portssupport SFP electrical modules.

Slots 1 to 6

TNH2SL1Q


Four STM-1 SFP optical/electricalports. The optical port type can beS-1.1, L-1.1, or L-1.2. STM-1 portssupport SFP electrical modules.

Slots 1 to 6

TNH2SL4D


Two STM-4 SFP optical ports of theS-4.1, L-4.1, or L-4.2 type

Slots 1 to 6

PDH board TNH2SP3D

42xE1/T1tributaryboard

Forty-two 75/120-ohm E1 ports orforty-two 100-ohm T1 ports

Slots 1 to 6

TNH2PL3T

3xE3/T3tributaryboard

Three 75-ohm E3/T3 ports Slots 1 to 6

EoS board TNH2EFS8

8xFEswitchingandprocessingboard

Eight FE electrical ports:10/100BASE-T(X)

Slots 1 to 6



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BoardClassification

BoardAcronym

BoardName

Port Type ValidSlot

TNH2EGT1

1xGEtransparenttransmissionboard

One GE SFP optical/electrical port:1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX/1000Base-T

Slots 1 to 6

WDM board TNM1DMD2

2-port opticaladd/dropmultiplexingboard

l wIN/wOUTl wA1/wA2l wD1/wD2l eIN/eOUTl eA1/eA2l eD1/eD2

slot 1 to 6

Auxiliaryinterfaceboard

TNM1AUX

Auxiliaryinterfaceboard

l One orderwire phone portl One asynchronous data portl One synchronous data portl 6-input/2-output alarm portl One 2-channel external clock

portl Two 2-channel external time

ports

Slots 1 to 6

Powersupplyboard

UPM Uninterruptible powermodule

l One 110 V/220 V AC powerinput port

l Two -48 V DC power outputports

Slot 97

TND1PIU

Powersupply board

One -48 V/-60 V DC power inputport

Slots 91and 92

TNF1APIU

Powersupply board

Two 110 V/220 V AC power inputports

l Slots 4and 6(recommended)

l Slots 2and 4

Fan board TNM1FAN

Fan board N/A Slot 93

2.2 Board AppearanceThis section describes the appearances, dimensions, and bar codes of boards.



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Appearances and DimensionsTable 2-2 lists the appearances and dimensions of the boards that the OptiX OSN 550 supports.

Table 2-2 Appearances and dimensions of the boards that the OptiX OSN 550 supportsBoardType

BoardName

Appearance Dimensions (H xW x D)

Systemcontrol,switching,and timingboard

PCX/CXL For example, PCXLX: 22.36 mm x 193.80mm x 269.73 mm

Packetprocessingboard

MD1/EM6T/EM6F/EG4C/EF8F/EX1/CQ1

For example, EM6F: 19.82 mm x 193.80mm x 225.80 mm

SDH board SL1D/SL4D/SL1Q

For example, SL1D: 19.82 mm x 193.80mm x 225.80 mm

PDH board SP3D/PL3T

For example, SP3D: 19.82 mm x 193.80mm x 225.80 mm

EoS board EFS8/EGT1

For example, EFS8: 19.82 mm x 193.80mm x 225.80 mm

WDMboard

DMD2 19.82 mm x 193.80mm x 225.80 mm



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BoardType

BoardName

Appearance Dimensions (H xW x D)

Auxiliaryboard

AUX 19.82 mm x 193.80mm x 225.80 mm

Powersupplyboard

UPM

GIE4805S

44.0 mm x 438.0mm x 240.0 mm

PIU 41.4 mm x 21.0 mmx 229.9 mm

APIU 40.1 mm x 193.8mm x 208.7 mm

Fan board FAN 86.2 mm x 28.5 mmx 217.6 mm

Note: The figure in the right cell shows the three dimensions. "H" and "W" indicate the heightand width of the front panel respectively and "D" indicates the depth of the printed circuitboard (PCB).

W

H

D



16

Bar CodeThe front panel of a board has two ejector levers and two captive screws. The ejector levers helpyou remove or insert a board. The captive screws fasten a board to the chassis. A board bar code(as shown in Figure 2-2) is attached to one of the ejector levers.

Figure 2-2 Bar codeBar code

2 Internal code34

Board versionBoard nameFeature code

1

5

Last six digits of the part number

020XES10AA800077-TNM1MD1 A1 2 3 4 5

NOTEOnly the bar codes of some boards contain feature codes, which further classify boards.



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3 System Control, Switching, and TimingBoards

About This Chapter

The OptiX OSN 550 uses the system control, switching, and timing board PCX.

3.1 PCXThe PCX is a system control, cross-connect, timing, and line board that works in Hybrid mode.It is available in five types of finished boards.3.2 CXLThe CXL is a system control, cross-connect, timing, and line board that works in TDM mode.

OptiX OSN 550 Multi-Service CPE Optical TransmissionSystemHardware Description 3 System Control, Switching, and Timing Boards


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3.1 PCXThe PCX is a system control, cross-connect, timing, and line board that works in Hybrid mode.It is available in five types of finished boards.

3.1.1 Version DescriptionThe functional version of the PCX is TNM1. PCX boards are available in five types of finishedboards: PCXLX, PCXX, PCXLG, PCXGA, and PCXGB.Table 3-1 lists the differences between the five types of PCX finished boards.

Table 3-1 Differences between the five types of PCX finished boardsFinishedBoard

PacketSwitchingCapability

TDMCross-ConnectCapability

TDM Service Port Packet Service Port

PCXLX

60 Gbit/s A higherorder cross-connectcapacity of20 Gbit/s anda lower ordercross-connectcapacity of 5Gbit/s

One STM-1/STM-4/STM-16 small form-factor pluggable(SFP) optical/electrical port. Theoptical port type canbe S-1.1, L-1.1,L-1.2, S-4.1, L-4.1,L-4.2, S-16.1,L-16.1, or L-16.2.STM-1 ports supportSFP electricalmodules.

One 10GE XFP opticalport: 10GBASE-SR(LAN), 10GBASE-SW(WAN), 10GBASE-LR(LAN), 10GBASE-LW(WAN), 10GBASE-ER(LAN), 10GBASE-EW(WAN), 10GBASE-ZR(LAN), or 10GBASE-ZW (WAN)

PCXX

60 Gbit/s None One 10GE XFP opticalport: 10GBASE-SR(LAN), 10GBASE-SW(WAN), 10GBASE-LR(LAN), 10GBASE-LW(WAN), 10GBASE-ER(LAN), 10GBASE-EW(WAN), 10GBASE-ZR(LAN), or 10GBASE-ZW (WAN)



19

FinishedBoard

PacketSwitchingCapability

TDMCross-ConnectCapability

TDM Service Port Packet Service Port

PCXLG

40 Gbit/s One STM-1/STM-4/STM-16 small form-factor pluggable(SFP) optical/electrical port. Theoptical port type canbe S-1.1, L-1.1,L-1.2, S-4.1, L-4.1,L-4.2, S-16.1,L-16.1, or L-16.2.STM-1 ports supportSFP electricalmodules.

One GE SFP opticalport: 1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX

PCXGA

20 Gbit/s None One GE SFP opticalport: 1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX

PCXGB

40 Gbit/s None One GE SFP opticalport: 1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX

3.1.2 Functions and FeaturesThis section describes the functions and features that the PCX supports.

System Control, Switching, and Timing UnitTable 3-2 lists the functions and features that the system control, switching, and timing unit ofthe PCX supports.



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Table 3-2 Functions and features that the system control, switching, and timing unit of the PCXsupports

Function and Feature BoardBasicfunctions

Packetswitchingcapability

l The PCXLX/PCXX supports 60 Gbit/s packet switchingfunction.

l The PCXLG/PCXGB supports 40 Gbit/s packet switchingfunction.

l The PCXGA supports 20 Gbit/s packet switching function.Time divisionmultiplexing(TDM) cross-connectcapacity

l A higher order cross-connect capacity of 20 Gbit/s and alower order cross-connect capacity of 5 Gbit/s

System control andcommunication

l Manages and controls the running status of an NE.l Works as a communication service unit between the

network management system (NMS) and NEs to help theNMS to control and manage the NE.

Packet system performance See Table 3-4.Multiprotocol LabelSwitching (MPLS)functions

The packet switching unit of the PCX works with its serviceinterface unit or a service board to implement MPLS functions.l Setup mode: static tunnelsl Protection: 1:1 tunnel automatic protection switching (APS)l Operation, administration and maintenance (OAM):

supports MPLS tunnel OAM and multiprotocol labelswitching transfer profile (MPLS-TP) tunnel OAM. MPLStunnel OAM complies with ITU-T Y.1711, and MPLS-TPtunnel OAM complies with ITU-T G.8113.1.



21

Function and Feature BoardPseudo wire emulationedge-to-edge (PWE3)functions

The packet switching unit of the PCX works with its serviceinterface unit or a service board to implement PWE3 functions.l Service categories

TDM PWE3 services (circuit emulation services[CESs])

Asynchronous transfer mode (ATM) PWE3 services ETH PWE3 services

l Setup mode: static pseudo wires (PWs)l Supports single-segment PWs (SS-PWs) and multi-segment

PWs (MS-PWs).l PW encapsulation mode: raw mode or tagged model PW control word: supported by the PCXLG/PCXGA/

PCXGB board whose printed circuit board (PCB) version isVer.B and the PCXLX/PCXX board.

l Protection: 1:1 PW APSl OAM: supports MPLS PW OAM and MPLS-TP PW OAM.

MPLS PW OAM complies with ITU-T Y.1711, and MPLS-TP PW OAM complies with ITU-T G.8113.1.

Equipment-levelprotection

l 1+1 hot standby

Synchronization

Clock/Timesource

The traced clock source at the physical layer can be any of thefollowing:l External clockl Synchronous digital hierarchy (SDH) line clockl Plesiochronous digital hierarchy (PDH) tributary clockl Synchronous Ethernet clockl Internal clock sourceThe traced packet clock/time source can be any of thefollowing:l External timel IEEE 1588v2 clock and timel IEEE 1588 adaptive clock recovery (ACR) clock

Clock protocol l Standard Synchronization Status Message (SSM) protocoll Extended SSM protocoll Best master clock (BMC) protocol

Datacommunicationnetwork(DCN)

Outband DCN l Mode 1: 32 data communications channels (DCCs) that arecomposed of D1-D3 bytes

l Mode 2: 12 DCCs that are composed of D1-D3 bytes or sixDCCs that are composed of D4-D12 bytes



22

Function and Feature BoardInband DCN l Supports the inband DCN function. The DCN bandwidth is

configurable.Networkmanagementprotocol

HuaweiEmbeddedControlChannel(HWECC)protocol

Supported by outband and inband DCNs

IP Supported by outband and inband DCNsOpen systemsinterconnection (OSI) overDCC protocol

Supported only by outband DCNs

SimpleNetworkManagementProtocol(SNMP)

Supported

Auxiliary and managementports

Provides one 10M/100M Ethernet NMS port or NMS serialport.

Line UnitTable 3-2 lists the functions and features that the line unit of the PCX supports.

Table 3-3 Functions and features that the line unit of the PCX supportsFunction and Feature Board

Basic functions l PCXLX: receives/transmits and processes 1x10GE signalsand 1xSTM-1/STM-4/STM-16 signals.

l PCXX: receives/transmits and processes 1x10GE signals.l PCXLG: receives/transmits and processes 1xGE signals and

1xSTM-1/STM-4/STM-16 signals.l PCXGA/PCXGB: receives/transmits and processes 1xGE

signals.



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Function and Feature BoardPortspecifications

TDM serviceport

l PCXLX/PCXLG: One STM-1/STM-4/STM-16 small form-factor pluggable (SFP) optical/electrical port. The opticalport type can be S-1.1, L-1.1, L-1.2, S-4.1, L-4.1, L-4.2,S-16.1, L-16.1, or L-16.2. STM-1 ports support SFPelectrical modules.

l PCXX/PCXGB/PCXGA: nonel An optical port can be a colored coarse wavelength division

multiplexing (CWDM) optical port or a colored densewavelength division multiplexing (DWDM) optical port. Acolored CWDM optical port supports a transmissiondistance of 40 km or 80 km. A colored DWDM optical portsupports a transmission distance of 120 km.

l The following types of small form-factor pluggable (SFP)modules are supported: STM-1/STM-4/STM-16 two-fiber bidirectional

pluggable optical module STM-1/STM-4 single-fiber bidirectional pluggable

optical module STM-1 pluggable electrical module

NOTEOnly an STM-16 optical port can be a colored DWDM optical port.

Packet serviceport

l PCXLX/PCXX: One 10GE XFP optical port: 10GBASE-SR (LAN), 10GBASE-SW (WAN), 10GBASE-LR (LAN),10GBASE-LW (WAN), 10GBASE-ER (LAN), 10GBASE-EW (WAN), 10GBASE-ZR (LAN), or 10GBASE-ZW(WAN)

l PCXLG/PCXGB/PCXGA: One GE SFP optical port:1000BASE-SX/1000BASE-LX/1000BASE-VX/1000BASE-ZX

l A 10GE optical port can be a colored CWDM optical portor a colored DWDM optical port. A colored CWDM opticalport supports a transmission distance of 70 km. A coloredDWDM optical port supports a transmission distance of 40km or 80 km.

l A GE optical port can be a colored CWDM optical port. Acolored CWDM optical port supports a transmissiondistance of 40 km or 80 km.

l The following types of SFP modules are supported: GE two-fiber bidirectional pluggable optical module GE single-fiber bidirectional pluggable optical module

l The XFP module supported is a 10GE two-fiberbidirectional pluggable optical module.



24

Function and Feature BoardPortattributes

Working mode l The GE optical port supports 1000M full-duplex and auto-negotiation.

l The 10GE optical port supports 10G full-duplex and thesetting of LAN mode or WAN mode.

TAG attributes l The TAG attribute can be set to tag aware, access, or hybrid.Traffic controlat ports

l Supports the port-based traffic control function thatcomplies with IEEE 802.3x.

Port type query SupportedQuery andsetting ofoptical powerthresholds

Supported

Packetservices

E-Line services l Native ETH services: E-Line services based on point-to-point transparent

transmission E-Line services based on virtual local area networks

(VLANs) E-Line services based on 802.1Q in 802.1Q (QinQ)

l ETH pseudo wire emulation edge-to-edge (PWE3) services:E-Line services carried by PWs (VPWS services)

E-LANservices

l Native ETH services: E-LAN services based on IEEE 802.1d bridges E-LAN services based on IEEE 802.1q bridges E-LAN services based on IEEE 802.1ad bridges

l ETH PWE3 services: E-LAN services carried by PWs(virtual private LAN services [VPLSs])

Ethernet dataframe format

IEEE 802.3/Ethernet II

Jumbo frame Supports a jumbo frame with a maximum length of 9600 bytes.MTU Ranges from 960 bytes to 9600 bytes, with 1620 bytes being

the default value.SDH service functions (forPCXLX/PCXLG boards)

Processes VC-12/VC-3/VC-4 services, VC-4-4c services(supported by STM-4/STM-16 service ports), and VC-4-16cservices (supported by STM-16 service ports).

Packetprotectionschemes

Tunnel APS Supports 1:1 tunnel APS.PW APS Supports 1:1 PW APS.



25

Function and Feature BoardMSTP Supports MSTP that runs only Common and Internal Spanning

Tree (CIST) instances. This type of MSTP provides the samefunctions as the Rapid Spanning Tree Protocol (RSTP).

ERPS Supports ERPS that complies with ITU-T G.8032/Y.1344.LAG l Aggregation types: manual aggregation and static

aggregationl Load sharing modes: load sharing and non-load sharing

LPT Point-point and point-multipoint LPT.TDMprotectionschemes(forPCXLX/PCXLGboards)

Sub-networkconnectionprotection(SNCP)

Supports SNCP at the VC-12/VC-3/VC-4 levels.

Ring multiplexsectionprotection(MSP)

Supports ring MSP at the STM-1/STM-4/STM-16 levels.

Linear MSP Supports linear MSP at the STM-1/STM-4/STM-16 levels.



26

Function and Feature BoardQuality of service (QoS)functions

The packet switching unit of the PCX works with its serviceinterface unit or a service board to implement QoS functions.l DiffServ

Supports simple traffic classification by specifying PHBservice classes for service flows based on their QoSinformation (C-VLAN priorities, S-VLAN priorities, DSCPvalues, or MPLS EXP values) carried by packets.

l Complex traffic classificationSupports complex traffic classification based on C-VLANIDs, S-VLAN IDs, C-VLAN priorities, S-VLAN priorities,C-VLAN IDs + C-VLAN priorities, S-VLAN IDs + S-VLAN priorities, or DSCP values carried by packets, andV-UNI ingress policies.

l QoS policiesSupports port policies and V-UNI ingress policies.

l Access control list (ACL) policyPasses or discards packets in a flow that matches rulesspecified by a port policy or V-UNI ingress policy.

l CARProvides the CAR function for traffic flows at ports and V-UNI ingresses.

l ShapingProvides traffic shaping for a specific port, PW ingress,prioritized queue, or traffic flow.

l Congestion managementSupports tail drop and WRED dropping.

l Queue scheduling policiesSupports SP, WRR, and SP+WRR.

Maintenancefeatures

MPLS/MPLS-TP OAM

l Tunnel OAM and PW OAM are supported.l MPLS OAM supports connectivity verification (CV), fast

failure detection (FFD), backward defect indication (BDI),forward defect indication (FDI), ping, and traceroute testsin compliance with ITU-T Y.1711.

l MPLS-TP OAM supports continuity checks (CCs), remotedefect indication (RDI), alarm indication signal (AIS)insertion, loopback (LB) tests, linktrace (LT) tests, PW lossmeasurement (LM), locked signal function (LCK), test(TST) (only packet loss test supported), PW Client SignalFail (CSF) indication, and two-way delay measurement(DM) in compliance with ITU-T G.8113.1.



27

Function and Feature BoardETH OAM l Ethernet service OAM:

Supports CCs, LB tests, LT tests, and AIS insertion incompliance with IEEE 802.1ag.

Implements IEEE 802.1ag-based LM and DM withreference to ITU-T Y.7131.

l Ethernet port OAM: supports OAM auto-discovery, linkperformance monitoring, remote loopbacks, and selfloopchecks in compliance with IEEE 802.3ah.

Warm reset and cold resetBoard power consumption queryBoard temperature detectionBoard voltage detectionPort mirroring l Supports local port mirroring.

l Supports mirroring in the egress direction of a UNI port.l Supports mirroring in the ingress direction of UNI and NNI

ports.l Supports mirroring of PORT+VLAN services in the ingress

direction of a UNI port.Synchronization

SDH clocksource

Transmits SDH line clock signals at one port.

SynchronousEthernet

Transmits synchronous Ethernet clock signals at one port.

IEEE 1588v2 Transmits IEEE 1588v2 time and clock signals at one port.IEEE 1588ACR

Transmits 1588 ACR clock signals at one port.NOTE

Ports working in 10GE WAN mode do not support IEEE 1588v2 orIEEE 1588 ACR.

DCN l Each TDM port supports one embedded control channel(ECC).

l Each GE/10GE port supports one inband DCN channel.Internet GroupManagement Protocol(IGMP) snooping

Supported

Packet System Performance SpecificationsTable 3-4 lists the packet system performance specifications of the OptiX OSN equipment.



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Table 3-4 Packet system performance specificationsItem

Specifications

Protection

MPLS/MPLS-TPtunnelautomaticprotectionswitching(APS)

64NOTE

MPLS tunnel APS, MPLS PW APS, MPLS-TP tunnel APS, and MPLS-TP PW APSshare resources.

MPLS/MPLS-TPPW APS

Number ofMPLS/MPLS-TP PWAPSprotectiongroups

64NOTE

MPLS tunnel APS, MPLS PW APS, MPLS-TP tunnel APS, andMPLS-TP PW APS share resources.

Number ofboundmembers

512

Link-statepassthrough(LPT)

16

Linkaggregation group(LAG)

Number ofLAGs

16

Number ofmembers in aLAG

8

MultipleSpanningTreeProtocol(MSTP)

Number ofinstancessupported by aport

1



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Item

Specifications

Number of portgroups

1

Number ofportsprovided byportgroups

16

Ethernetringprotectionswitching(ERPS)

8

Linearmultiplexsectionprotection(LMSP) onthe packetplane

8

Maintenance

MPLS/MPLS-TPtunnelOAM

128NOTE

MPLS tunnel OAM, MPLS PW OAM, MPLS-TP tunnel OAM, MPLS-TP PWOAM, and ETH OAM share resources.

MPLS/MPLS-TPPW OAM

128NOTE

MPLS tunnel OAM, MPLS PW OAM, MPLS-TP tunnel OAM, MPLS-TP PWOAM, and ETH OAM share resources.

ETH OAM(MPLS/MPLS-TPtunnelOAM,MPLS/MPLS-TPPW OAM,and ETHOAMshareresources.)

Number ofmaintenancedomains (MDs)

64

Number ofmaintenanceassociations(MAs)

64



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Item

Specifications

Number ofmaintenanceassociation endpoints(MEPs)

64

Number ofmaintenanceassociationintermediatepoints(MIPs)

64

ATMOAM

8K

Services

E-Lineservices

1KNOTE

Native ETH services and PWE3 ETH services (VPWSs) share resources.

E-LANservices

Number of E-LANservices(E-LANVSIs)supported by anNE(VSI isshortforvirtualswitchinstance.)

l Native ETH services: 1l PWE3 ETH services (VPLSs): 128NOTE

Native ETH services and PWE3 ETH services (VPLSs) cannot coexiston the same NE.



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Item

Specifications

Number oflogicalportssupported by aVSI(NativeETH)

1K

Number oflogicalportssupported by aVSI(VPLS)

128

Number ofvirtualuser-networkinterfaces (V-UNIs)supported by anNE(VPLS)

Number of V-UNIs Number of VLANs32 409664 2047128 1023256 511512 2551024 127

Number of splithorizongroupssupported by aVSI

3

Number oflogicalportssupported by anNE

1K



32

Item

Specifications

CESservices

256

ATMservices

Number oflocalservices

128

Number ofremoteservices

256

Multi-LinkPoint-to-PointProtocol(ML-PPP)

Number ofML-PPPgroupssupportedby an NE

64

Number ofPPP linkssupportedby an NE

504

Number ofmemberlinkssupportedin an ML-PPP group

16

IGMPsnooping

Number ofmulticastgroups

512

Number ofmembersin amulticastgroup

1K



33

Item

Specifications

QoS

Number ofportweightedrandomearlydiscard(WRED)policies

8

Number ofvirtualuser-networkinterface(V-UNI)ingresspolicies

256

Number ofportpolicies

256

Number ofDifferentiatedServices(DiffServ)domains

8

Number ofport flows

512

Number ofV-UNIingressflows

512

Number oftrafficclassification rules

1

Number ofaccesscontrollists(ACLs)

512



34

Item

Specifications

Others

Number ofMPLStunnels

l Unidirectional: 1Kl Bidirectional: 512NOTEl One bidirectional MPLS tunnel is counted as two unidirectional MPLS tunnels.l If MPLS tunnels do not carry PWs, the sum of PWs and MPLS tunnels must not

exceed 1K. If MPLS tunnels carry PWs, the MPLS tunnels are not counted andthe number of carried PWs must not exceed 1K. Therefore, if each MPLS tunnelcarries one PW, the number of MPLS tunnels and the number of PWs can bothbe 1K.

Tunnelbandwidth

10 Gbit/s

Number ofstatic PWs

1KNOTE

If MPLS tunnels do not carry PWs, the sum of PWs and MPLS tunnels must notexceed 1K. If MPLS tunnels carry PWs, the MPLS tunnels are not counted and thenumber of carried PWs must not exceed 1K. Therefore, if each MPLS tunnel carriesone PW, the number of MPLS tunnels and the number of PWs can both be 1K.

PWbandwidth

10 Gbit/s

Number ofMS-PWs

128

Number ofQinQ links

1K

MACaddresses

Number ofstaticMACaddressessupported by anE-LAN

512

Number ofMACaddressessupported by E-LANservices

16K



35

Item

Specifications

Number ofMACaddressessupported by anNE

16K

VLAN IDrangesupportedby a port

1 to 4094

NOTE

The values listed in the preceding table are the maximum values supported by the OSN equipment.

3.1.3 Working Principle and Signal FlowThe PCX consists of a system control and communication unit, a packet switching unit, a GE/10GE signal access unit, a cross-connect unit, a line unit, a clock unit, and a power supply unit.



36

Function Block DiagramFigure 3-1 Function block diagram of the PCX

Backplane

Power supply

unit

Clock unit

Control bus

Packet switching unit

GE/10GE signal processing unit

Packet service

GE/10GE signal

GE/10GE signal

Cross-connect unit

TDM serviceService boardSTM-1/4/16 signal Line unit

Ethernet NM portNM serial port System control and communication unit

+3.3 V power supplied to other boards+12 V power supplied to fans

Power supplied to the other units on the board

Clock signal provided to the other units on the board

Clock signal received from

the service unit on the board

Clock signal received from other boardsClock signal provided to other boards

Service board

System power supply -48 V/-60 V

-48 V/-60 V

Fuse

System power supply

System Control and Communication UnitThe system control and communication unit consists of the CPU unit and logic control unit. Thesystem control and communication unit performs the following functions:l The CPU unit performs the following control functions using the control bus:

Manages other boards and the other units on the PCX, and collects alarms andperformance events.

Implements software loading by reading information from the CF card.l The CPU unit processes network management messages in DCCs using the logic control

unit.l The CPU unit communicates with the NMS by its Ethernet NM port.l The logic control unit decodes the address read/write signals from the CPU unit and enables

FPGA loading.l The logic control unit cross-connects the overheads between the auxiliary interface unit,

the CPU unit, and other boards. This helps to achieve the following purposes: Adding or dropping DCC information processed by the CPU unit Adding or dropping orderwire and synchronous/asynchronous data services



37

Exchanging the orderwire bytes, DCC bytes, and K bytes between different linesl The system control and communication unit on a PCX board communicates with the system

control and communication unit on the standby PCX board by carrying FE signals over thecommunication bus in the backplane. In this manner, the active and standby PCX boardsform a 1+1 hot backup relationship.

Packet Switching UnitThe packet switching unit grooms services and processes protocols for packet services.l After receiving services from a packet service board, the packet switching unit grooms the

services based on the configurations delivered by the system control and communicationunit.

l After receiving protocol packets from a packet service board, the packet switching unittransmits the protocol packets to the system control and communication unit for processing.After processing, the system control and communication unit sends the protocol packetsback to the packet switching unit. The packet switching unit transmits the protocol packetsto the packet service board.

Cross-Connect UnitThe cross-connect unit grooms TDM services over the entire system using the higher order cross-connect module and the lower order cross-connect module. Figure 3-2 shows the function blockdiagram of the cross-connect unit.

Figure 3-2 Function block diagram of the cross-connect unit

Source TDM service unit

Higher order cross-

connect moduleHOXC

Lower order cross-

connect moduleLOXC

Sink TDM service unit

The source TDM service unit transmits VC-4 signals to the higher order cross-connect moduleover cross-connect buses. If the VC-4 signals carry only VC-4 services, the higher order cross-connect module processes the VC-4 signals and then transmits the signals to the sink TDMservice unit. If the VC-4 signals include VC-12 or VC-3 services, the higher order cross-connectmodule grooms the VC-12 or VC-3 services to the lower order cross-connect module. The lowerorder cross-connect module processes the VC-12 or VC-3 services and then transmits theservices back to the higher order cross-connect module. The higher order cross-connect moduleprocesses the services and then transmits the services to the sink TDM service unit.



38

Clock Unitl The clock unit selects an appropriate clock source from service clock sources at service

ports based on clock priorities. Locking the clock source by means of the phase-lockedloop, the clock unit provides the system clock to other units on the PCX and other boards.

l The clock unit receives IEEE 1588v2 messages and IEEE 1588 ACR messages from theGE/10GE signal access unit, and performs protocol processing to achieve clock/timesynchronization.

l The clock unit supports synchronous Ethernet clock.l The clock units on the active and standby PCX boards transmit clock signals to each other.

GE/10GE Signal Processing UnitThe GE/10GE signal processing unit receives/transmits and processes 1xGE/10GE opticalsignals.l In the receive direction:

After performing optical-to-electrical (O/E) conversion, decoding, and serial/parallelconversion for GE/10GE optical signals, the GE/10GE signal processing unit extractsframed GE/10GE signals by delimiting frames and adding preambles. The GE/10GEsignal processing unit also performs cyclic redundancy checks (CRCs).

The GE/10GE signal processing unit works with the packet switching unit to processVLAN tags in Ethernet data frames, process labels in Multiprotocol Label Switching(MPLS) or pseudo wire emulation edge-to-edge (PWE3) packets, perform quality ofservice (QoS) processing such as traffic classification and committed access rate (CAR)restriction for Ethernet data frames, and process operation, administration andmaintenance (OAM) packets and protocol packets.

l In the transmit direction: The GE/10GE signal processing unit works with the packet switching unit to process

VLAN tags in Ethernet data frames, process labels in MPLS or PWE3 packets, performQoS processing such as traffic shaping and queue scheduling for Ethernet data frames,and process OAM packets and protocol packets.

After delimiting frames, adding preambles, and calculating CRC codes, the GE/10GEsignal processing unit performs parallel/serial conversion and encoding and thentransmits GE/10GE signals to the GE/10GE optical port after performing electrical-to-optical (E/O) conversion.

Line UnitThe line unit performs the following functions: STM-1/STM-4/STM-16 signal receiving, serial/parallel conversion, clock signal extraction, data restoration,

osn 550 v100r006c01 hardware description 01

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