Huawei OptiX OSN 9800 U32 Enhanced Subrack V100 User Manual Download

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OptiX OSN 9800 U32 Enhanced Subrack

V100

Quick Installation Guide

Issue 03

Date 2019-09-03

HUAWEI TECHNOLOGIES CO., LTD.

Summary of Contents for OptiX OSN 9800 U32 Enhanced Subrack V100

Page 1: ...OptiX OSN 9800 U32 Enhanced Subrack V100 Quick Installation Guide Issue 03 Date 2019 09 03 HUAWEI TECHNOLOGIES CO LTD ...

Page 2: ... and features described in this document may not be within the purchase 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 representations of any kind either express or implied The information in this document is subject to change without notice Every effort has been...

Page 3: ...t 25 7 4 Removing the Air Deflector at the Bottom of an A66B Cabinet 26 7 5 Installing the Air Deflector at the Bottom of an A66B Cabinet 27 7 6 Removing the Air Filters and Windproof Sponges from the Rear Door of an A66B Cabinet 28 8 Installing Type A Multi Purpose Fiber ManagementCabinets 29 8 1 Overview of Type A Multi Purpose Fiber Management Cabinets 29 8 1 Preparations for Installing Type A ...

Page 4: ...uting External Fibers Unequipped with Fiber Management Frames 72 11 3 Installing Routing External Fibers Equipped with Multi Purpose Fiber Management Cabinet 73 12 Performing the Post installation Check 75 12 1 Post installation Checklist 75 12 2 Equipment Inspection Before Power On 76 13 Engineering Labels 77 4 ...

Page 5: ...ased on the distance between the two horizontal beams If the cable trough does not contain any beams the binding intervals between cable ties cannot exceed 250 mm CAUTION Safety Information Always wear protective gloves when lifting or transporting a cabinet to prevent hand injuries or damage to the cabinet surface The equipment is heavy To prevent human injuries or equipment damage always use a l...

Page 6: ...objects may cause an NE failure Boards are fragile and vulnerable When transporting or placing a board exercise caution and ensure that the board is packed in a dedicated box to protect the board against damage Boards must be packed with original packaging materials during transportation If the original packaging materials are lost contact Huawei Operating a board without ESD protection Wearing ES...

Page 7: ...ire clippers COAX stripper RJ45 crimping tool Diagonal pliers Wire stripper Power cable crimping tool Network cable tester Multimeter Tools and Equipment for Installing Cabinets Vacuum cleaner Hammer drill Plumb line Marker Ø16 drill bit Multimeter Claw hammer Combination wrench Phillips screwdriver Flat head screwdriver Powder marker M6 M12 socket wrench Ruler Level Torque wrench 7 ...

Page 8: ...6 Service board area 7 CTU and UCXCS board area 8 Noise reduction module Product Initial Supportive Product Version U32 Enhanced Subrack V100R006C00 6 7 6 5 4 8 1 8 2 3 4 5 Availability U32 Enhanced Subrack using the installation in an A63B Cabinet as an example 8 4 1 Cabinet and Subrack ...

Page 9: ...door removed 9 NOTE The type A multi purpose fiber management cabinet is also called the air deflector It consists of the left side cabinet and right side cabinet The left side and right side cabinets are symmetrical in shape The dimensionsof the left side or right side cabinet are 2200 mm H x 300 mm W x 300 mm D Appearance ...

Page 10: ...Overall appearance of the U32 enhanced subrack with type A multi purpose fiber management cabinets 10 NOTE The appearance of the cabinet front door varies depending on the delivery version ...

Page 11: ...ed on the actual scenario 11 Flood Air Sub Type Name Equipment Room Feature Ventilation Mode of U32 Enhanced Multi Purpose Fiber Management Cabinets Installed Flood air 1 The air supply duct is not installed at the top of the equipment room 2 The cold air is sent to the equipment room through the air exhaust vent of the precise air conditioner A air inlet from front air outlet from front top B air...

Page 12: ...ct Sub Type Name Equipment Room Feature Ventilation Mode of U32 Enhanced Multi Purpose Fiber Management Cabinets Installed Overhead air through ducts 1 The air supply duct is installed at the top of the equipment room 2 Through the air supply duct at the top of the precise air conditioner cold air is sent from the air exhaust vent to the top of the device aisle A air inlet from front air outlet fr...

Page 13: ...p or an aisle door B air inlet from front air outlet from top B Yes Underfloor air supply The aisle is open with cold duct in the front and hot duct in the rear 1 ESD floors are required in the equipment room and are raised to a certain height 2 ESD floors are required only in front of a device The front aisle is not equipped with a blocking panel at the top or an aisle door D air inlet from botto...

Page 14: ...r cold ducts Hot air Cold air Hot air Cold air Equipment room Principle of heat dissipation for underfloor air supply 14 Underfloor Air Supply Blocking panel on the top of the aisle Aisle door Ventilation ESD floor or perforated floor porosity 50 The equipment room with closed cold duct is used as an example NOTE ...

Page 15: ...is case ventilation mode B air inlet from front air outlet from top can be used 15 Underfloor Air Supply Ventilation ESD floor Cabinet row Device front Device front U32 enhanced back to back installation with multi purpose fiber management cabinets Identifying the Floor Type of the Equipment Room ...

Page 16: ...Ventilation ESD floors are used only on the front side of the U32 enhanced subrack In this case ventilation mode D air inlet from front air outlet from rear can be used U32 Enhanced using an A66B cabinet Ventilation ESD floor Cabinet row 2 Ventilation ESD floors are used only on the bottom of the U32 enhanced subrack In this case ventilation mode C air inlet from bottom air outlet from front top c...

Page 17: ...tioners are close to heat sources cabinets and the returned air temperature is high Therefore the cooling efficiency of in row air conditioners is high 4 In row air conditioners are commonly used in the modular data center Some communication equipment rooms also use in row air conditioners for local cooling supplement so as to eliminate partial hot spots In row air conditioner Sub Type Name Equipm...

Page 18: ...because they do not support back to back installation and the rear door of the cabinet needs to be removed Ventilation mode A air inlet from front air outlet from front top Ventilation mode B air inlet from front air outlet from top Ventilation mode C air inlet from bottom air outlet from front top Ventilation mode D air inlet from front air outlet from rear using an A66B cabinet Ventilation mode ...

Page 19: ...ation mode C involve version change Before placing an order or starting installation in this mode contact Huawei engineers Underfloor air supply precise air supply A63B Yes D Air inlet from front air outlet from rear Underfloor air supply Aisles are not closed cold aisle is used in the front hot aisle is used in the rear and perforated floors are used in the front Underfloor air supply closed cold...

Page 20: ...cabinet does not need to be installed For details about how to install an A63B cabinet with U32 enhanced subracks see the A63B Cabinet Quick Installation Guide To prevent the noise reduction module of the subrack from blocking the bolt installation remove the noise reduction module at the bottom of the subrack before installing the cabinet After the cabinet is installed re install the noise reduct...

Page 21: ...t Quick Installation Guide To prevent the noise reduction module of the subrack from blocking the bolt installation remove the noise reduction module at the bottom of the subrack before installing a cabinet After the cabinet is installed install the noise reduction module in the original area For details see section Installing the Cabinet in this document For details about how to install a type A ...

Page 22: ... Deflector at the Bottom of an A66B Cabinet and Installing the Air Deflector at the Bottom of an A66B Cabinet in this document To implement ventilation mode D air inlet from front and air outlet from rear the air filter and windproof sponges need to be removed from the rear door of the cabinet after the cabinet installation For details see section Removing the Air Filters and Windproof Sponges fro...

Page 23: ...ng the Noise Reduction Module at the Bottom of an A63B Cabinet and Installing the Noise Reduction Module at the Bottom of an A63B Cabinet If the U32 enhanced subrack needs to adapt to ventilation mode B air inlet from front air outlet from top you only need to re install some of the noise reduction modules after the cabinet is installed For details see section Ventilation Mode B air inlet from Fro...

Page 24: ...wer Part of an A63B Cabinet Pull out the upper part of the noise reduction module Remove the lower part of the noise reduction module Counterclockwise Loosen the four screws that fix the noise reduction module in the lower part of the cabinet 24 2 04 0 20 N m M6 2 screwdriver ...

Page 25: ...e lower part innermost position of the cabinet and put it down Clockwise Fasten the four screws to secure the noise reduction module 25 Push the lower part of the noise reduction module to the innermost position of the cabinet and put it down After installing the bolts on the cabinet perform the following steps to install the noise reduction module NOTE 2 04 0 20 N m M6 2 screwdriver ...

Page 26: ...t 7 4 Removing the Air Deflector at the Bottom of an A66B Cabinet 26 Loosen the four screws that fix the air deflector at the bottom of the cabinet counterclockwise Remove the air deflector at the bottom of the cabinet 4 1 ...

Page 27: ... of the air deflector faces the bottom of the subrack and the air exhaust vent faces the rear door of the cabinet Tighten the screws on the air deflector in holes 1 and 4 of the cabinet NOTE After the bolts are installed you need to perform the following steps to install the air deflector M6 2 04 0 20 N M Air exhaust vent green backward Air intake vent red upward 2 screwdriver ...

Page 28: ...ower beams NOTE To prevent dustproof invalidity of the front door due to incorrect installation of the front and rear doors you are advised to perform this step when the front and rear doors are properly installed Remove the upper and lower beams of the rear door The methods for removing the upper and lower beams are the same The following figure shows how to remove the lower beam Air filter 1 Air...

Page 29: ... for future customization of ventilation modes Left side cabinet Right side cabinet No Name Quantity No Name Quantity 1 Rodent proof cover 8 PCS 4 PCS for a single cabinet 2 Rear panel 10 PCS 5 PCS for a single cabinet 3 Large side panel 2 PCS 1 PCS for a single cabinet 4 Bottom air filter 2 PCS 1 PCS for a single cabinet 5 Packing box A 1 PCS 6 Packing box B 1 PCS 7 Horizontal support 6 PCS 1 3 5...

Page 30: ...Packing box A Packing box B Windproof sponge 2 Windproof sponge 1 30 Type A Multi Purpose Fiber Management Cabinet ...

Page 31: ...multi purpose fiber management cabinets to be installed Use a marker to mark the point where the plumb bob contacts the floor Repeat step 1 to mark another point on the floor Then draw a line between the two points using a powder marker The positioning method is for reference only The actual installation position depends on the project engineering drawing NOTE Concrete Floor Determining the Instal...

Page 32: ...n Holes for U32 Enhanced and Multi Purpose Fiber Management Cabinet on the Concrete Floor Unit mm Multi purpose fiber management cabinet U32 Enhanced Front Back 32 Concrete Floor Determining the Installation Holes ...

Page 33: ...talling Multi Purpose Fiber Management Cabinets Supports Install multi purpose fiber management cabinets supports Adjust the height of the multi purpose fiber management cabinets supports to ensure that they are in the same height as the U32 support Partially tighten the height locking bolts If a support is not level place spacers under the support Tighten the expansion bolts using a torque socket...

Page 34: ... the guide ribs properly engage with the guide grooves Insert the expansion bolt into the hole Knock the expansion bolt into the hole with a claw hammer Screw the expansion bolt clockwise to ensure that the expansion nut and tube are not easily pulled out of the hole Screw the expansion bolt out anticlockwise of the hole Remove the spring and flat washers from the expansion bolt ...

Page 35: ... A multi purpose fiber management cabinets with the cabinet 3 Secure the type A multi purpose fiber management cabinets 4 Install the side panels of the cabinet as the side panels of the type A multi purpose fiber management cabinets 5 Re install the two air filters at the bottom of the type A multi purpose fiber management cabinets 6 Re install the two front doors in the type A multi purpose fibe...

Page 36: ... remove the noise reduction module at the bottom of the subrack before installing the cabinet After the cabinet is installed re install the module and discard the module For details see the following steps NOTE Removing the Noise Reduction Module from the Lower Part of a Cabinet Counterclockwise Loosen the four screws that fix the noise reduction module in the lower part of the cabinet Pull out th...

Page 37: ...d The side panels of the U32 enhanced device have been installed in the cabinet before delivery When installing a type A multi purpose fiber management cabinet remove the side panels first You need to put away the removed side panels and re install them in the type A multi purpose fiber management cabinet later Loosen two M6 12 screws at the top and bottom of each side panel Pull out the side pane...

Page 38: ...the spring pins on top of the door and side panels Put away the door panels for re installation later Remove two air filters from the left and right sides of the bottom of the type A multi purpose fiber management cabinet Loosen the captive screws on the air filters counterclockwise and then remove the air filters After the air filters are removed put them away and install them back later ...

Page 39: ... the type A multi purpose fiber management cabinet onto the support and align the installation holes of the type A multi purpose fiber management cabinet with the bolt holes of the support Cross sectional view of the fiber management cabinet bottom Combine cabinets The bottom connecting plate is placed at the bottom right position of the left side type A fiber management cabinet Before combining t...

Page 40: ...nagement cabinet and the device cabinet may interfere with the enclosure frames Therefore before combining the cabinets you need to remove the redundant connecting plates As shown in the second figure any two large connecting plates and any two small connecting plates are used for combining the cabinets and the other connecting plates are removed NOTE Connecting plates on top of the cabinets to be...

Page 41: ...h fiber management cabinet as shown in the following figure Re install the side panels of the cabinet The left side panel of the cabinet is re installed in the left side type A multi purpose fiber management cabinet and the right side panel of the cabinet is re installed in the right side type A multi purpose fiber management cabinet The procedure for installing the side panels of the cabinet is t...

Page 42: ...lintel of the fiber management cabinet Second group b1 to b2 from the ground point at the bottom of the left side door panel of the fiber management cabinet to the ground point on the rear side of the fiber management cabinet Third group c1 to c2 from the ground point at the bottom right position of the fiber management cabinet to the ground point on the lower left part of the cabinet 7 Re install...

Page 43: ...of the beam into the installation hole push the left side of the beam to align with the door panel align the left side with the installation hole and press the latch for locking When re installing the lower beam ensure that windshieldsponge 1 is pressed by the beam Rear cross section of sponge 1 Rear cross section of sponge 2 NOTE The dark gray areas are adhesive areas Before using them remove rel...

Page 44: ...tion Guide Install the front door of the U32 enhanced cabinet 2 Install the noise reduction module in the lower part of the cabinet Push the lower part of the noise reduction module to the innermost position of the cabinet and put it down NOTE After installing the bolts on the cabinet perform the following steps to install the noise reduction module 3 ...

Page 45: ...sion bolt and ground bolt of the multi purpose fiber management cabinet The resistance must be greater than 5 mega ohms If the resistance is less than 5 mega ohms check whether all required insulation parts have been properly installed and are free of damage If this is the case perform the insulation test again If the insulation parts are found damaged uninstall the cabinet and other materials The...

Page 46: ...that the PSU board is fully seated in the subrack Tighten the screws on the front panel of the PSU board 46 Installing PSU and EFI Boards a Wear an ESD wrist strap or ESD gloves during operations CAUTION Subrack Board Slot U32 Enhanced Subrack PSU IU100 IU104 IU106 U110 EFI IU105 PSU and EFI board slots The board is designed for easy installation If you feel a blockage when inserting a board into ...

Page 47: ...ther the board was correctly inserted or whether its type is correct Do not forcibly insert the board Remove the screws from the filler panel pull the ejector levers outwards and then withdraw the filler panel from the slot Press and hold the micro switches of the ejector levers to fully raise the ejector levers on both sides to maximize the angles between the ejector levers and the panel Gently i...

Page 48: ...d is designed for easy installation If you feel a blockage when inserting a board into a slot remove the board and check whether it was inserted correctly or whether it is of the correct type Do not use force to insert the board 2 The installation error proofing identification of filler panels is the same as that of boards Service board slots In upper portion slots board ejector levers are on the ...

Page 49: ...to secure the board in the slot Tighten the screws on the front panel of the board Remove the filler panel screws and hold the ejector levers outwards Then withdraw the filler panel from the slot Guide rail 0 71 0 07 N m M4 2 screwdriver The following describes how to install boards in upper slots The installation direction of boards in lower slots is opposite When installing boards ensure that th...

Page 50: ...optical module contacts well with the board connector inside the cage After the installation is completed check that the screws are fastened properly Remove the dust proof plug from the CFP cage of the board Push the CFP optical module into the cage horizontally Pull the two screw rods outwards and ensure that the rods are free Then partially tighten the rod on one side Completely tighten the rod ...

Page 51: ...overs a vacant fan tray assemblyslot or inside the fan tray assemblyslot When installing a fan tray assemblyin the upper portion of a cabinet ensure that the mounting direction label on the right of the fan tray assemblysurface faces upward When installing a fan tray assemblyin the lower portion of a cabinet ensure that the mounting direction label on the left of the fan tray assemblysurface faces...

Page 52: ...tton is located on each side of a fan tray assembly You must press both the buttons to remove the fan tray assembly from the slot 1 During the installation of a fan tray assembly if the fan tray assembly is fully inserted the fan indication is Otherwise the red area is displayed in the fan indication ...

Page 53: ...D Clears the database in the flash memory 1011 State E Clears all the data in the flash memory except the board manufacturing information The data includes the file system data system parameter area and extended BIOS The upper layer part of BIOS is not started 1111 a The system parameter area includes NE IP address gateway IP address subnet mask NE ID extended ID node ID of the ASON NE and route I...

Page 54: ...e hole c or d Mapping between top cable holes and PSU board power cables Front view of the PSU in the U32 enhanced subrack 54 When overhead cabling is required Thread the power cable out of the cabinet through cable hole a or b Thread the NM cable and alarm cable out of the cabinet through cable hole b Thread optical fibers out of the cabinet through cable hole a When underfloor cabling is require...

Page 55: ... cabinet connect the ground cable to the ground screws Then thread the power cables into the cabinet through the cable holes and connect them to the DC input terminals on the PSU at the top of the cabinet Overhead Cabling Underfloor Cabling Thread power and ground cables into the cabinet through cable holes in the ESD support at the bottom of the cabinet For the ground cable route it by way of the...

Page 56: ... cabinet connect the ground cable to the ground screws Then thread the power cables into the cabinet through the cable holes and connect them to the DC input terminals on the PSU at the top of the cabinet Overhead Cabling Underfloor Cabling Thread power and ground cables into the cabinet through cable holes in the ESD support at the bottom of the cabinet For the ground cable route it by way of the...

Page 57: ...B Cabinet Ground Cables 57 M8 12 24 1 22 N m Installing A66B Cabinet Ground Cables M8 12 24 1 22N M There are two groups of ground screws on the top of the A66B cabinet and only one group of ground screws is required You are advised to preferentially select the group with a ground label NOTE To the ground bar in the equipment room ...

Page 58: ...g U32 Enhanced Subrack Ground Cable Ground point 1 Connect one end of the subrack ground cable to the ground screw at the top of the subrack and connect the other end to an appropriate ground screw located on the right side cabinet column The U32 enhanced subrack has two ground screws which are commonly used at ground point 1 If an air deflector is installed in the upper part of the subrack use gr...

Page 59: ...y by default Check the carrier s requirements and select power cables with proper colors for installation This document uses configuration 2 power cables as an example Selecting Power Cables a 1 The customerEoS feeds power to the PSU from the rectifier cabinet of the equipment room The total length of cables from the rectifier cabinet to the PSU must be less than 80 m It is recommended that the le...

Page 60: ...ng copper fittings Not using copper fittings 60 Selecting Power Cables a The following table lists the specifications of two upgrade schemes for the power inputs of PSUs on the left side of a U32 Enhanced subrack The number of the power inputs of PSUs on the right side of the subrack can be the same as that on the left side of the subrack NOTE PSU power supply pools use the N N 3 N 5 power distrib...

Page 61: ...PSU PSU EFI PSU PSU PSU PSU PSU PSU PSU PSU PSU PSU EFI PSU PSU PSU PSU PSU 61 b Power Cable Connections PSU NOTE The PIU boards on the left and right sides of the EFI board are in mutual backup When two PSUs are connected using a copper fitting the input current cannot be lower than 63 A ...

Page 62: ...quipment 2 The equipment is powered off only after all power inputs to each PSU board are disconnected WARNING M3 0 59 0 06 N m 2 screwdriver Install the OT terminals on the power cables according to the instructions on the plastic cover of each PSU board Ensure that the terminals are installed correctly CAUTION 63 A Power Input M6 5 10 0 51 N m 3 screwdriver 63 A PSU PSU PSU PSU PSU EFI PSU PSU P...

Page 63: ... 125 A 63 A 125 A Power Input Determine the power input positions Install the copper fitting short NEG and power cable NEG Copper fitting short Power cable NEG PSU PSU PSU PSU PSU EFI PSU PSU PSU PSU PSU 63 c Installing Power Cables PSU ...

Page 64: ...er fitting long Power cable RTN 64 c Installing Power Cables PSU Install the OT terminals on the power cables according to the instructions on the plastic cover of each PSU board Ensure that the terminals are installed correctly Connect the power cables to the screws on the left legs of the copper fittings CAUTION ...

Page 65: ...stalling Routing Cables 10 5 Installing Routing NM Cables GE1 FE NM GE2 NM GE1 FE GE2 NM GE1 FE GE2 NMS 65 U32 Enhanced Subrack a NOTE The U32 enhanced subrack is connected to the NMS through the NM port ...

Page 66: ...d U16 subrack central switching subrack can only be a slave subrack but cannot be a master subrack U64 U32 U16 subracks Routing NM Cables d NOTE 1 The NM cable is routed through the fiber trough either in overhead cabling or underfloor cabling mode 2 Two cable saddle clamps are mounted on each side left and right sides of the subrack for routing CTU board fibers The two cable saddle clamps are nex...

Page 67: ...Installing Routing Cables 10 6 Installing Routing Housekeeping Alarm Cables Alarm cable To the central alarm management system 67 NOTE On the EFI board the ALMO1 interface outputs alarm signals ...

Page 68: ...Installing Routing Cables 10 7 Installing Routing Door Alarm Cables 68 Interface Description a Connecting Door Alarm Cables b Subrack EFI ...

Page 69: ...Routing Cables 10 8 Installing Routing Cabinet Indicator Alarm Cables 69 A cabinet alarm indicator cable connects the LAMP interface on an EFI board to the alarm indicator interface at the top of the cabinet NOTE ...

Page 70: ...relationship of clock cables X1 X2 Color Relationship 1 4 White Orange Pair 2 5 Orange 3 7 White Green Pair 4 1 Blue 5 2 White Blue Pair 6 8 Green 7 3 White Brown Pair 8 6 Brown 70 Interface Description a The clock interfaces are located on the EFI board b Connecting Clock Cables ...

Page 71: ...uawei com carrier docview docview nid DOC1000132657 Scan the QR code to view multimedia documents Open End Corrugated Pipe Introduction Do not use an open end corrugated pipe to hold excessive fibers It is recommended that an open end corrugated pipe that has a diameter of 32 mm accommodate60 fibers at most each with a diameter of 2 mm Before routing fibers out of a cabinet ensure that they are pr...

Page 72: ... ESD floors partially block the fiber routing space and power cables occupy the fiber routing space on the two sides of the cabinet Therefore the actual fiber routing capability of the cabinet is adversely affected and optical fibers must be routed using a fiber management cabinet or a multi purpose fiber management cabinet NOTE Fiber binding tape Fiber extractor Cable tie Fiber The fiber trough o...

Page 73: ...rnal Fibers Equipped with Multi Purpose Fiber Management Cabinet Cable tie Fiber Fiber extractor Fiber binding tape 73 Installing and Routing External Fibers With Multi Purpose Fiber Management Cabinets Installing Routing External Fibers Overhead Cabling a ...

Page 74: ...Cable tie Fiber Fiber extractor Fiber binding tape 74 Installing and Routing External Fibers With Multi Purpose Fiber Management Cabinets Installing Routing External Fibers Underfloor Cabling b ...

Page 75: ...orrectly and securely 6 Labels at both ends of each cable and fiber are marked correctly clearly and neatly 7 The fibers routed outside a cabinet are protected in a pipe or trough and are protected from being pulled out or pressed against by other cables or objects 8 The bending radius of fibers is not less than 8 mm There are no sharp components along the routing path for the fibers 9 Fibers are ...

Page 76: ...cting the Equipment Before Power On b Do not insert or remove power plugs and PSU boards when they are energized WARNING Switch on the main power for the subrack and check whether the subrack is powered on If the subrack is powered on switch the main power off and then switch on the backup power for the subrack If the subrack is powered on switch on the main power again Check the power indicator g...

Page 77: ... fiber 2 cm away from its connectors NOTE Affixing a Label to a Power Cable a Affixing a Label to a Signal Cable b If a cable is routed vertically the label must face to the right If a cable is routed horizontally the label must face downwards NOTE ...

Page 78: ...pment in a cabinet Ethernet interfaces are numbered from top to bottom and from left to right Label for fibers used to connect WDM devices MN A B C D MN indicates the row and column number of the cabinet A is a two digit number that indicates the position of a subrack in a cabinet Subracks are numbered from bottom to top B is the slot ID C identifies a board name D is the optical interface name La...

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