bsc backplane cabling & bcsu expansion_amit_joshi

7/22/2019 BSC Backplane Cabling & BCSU Expansion_Amit_joshi

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1 © Nokia Siemens Networks Presentation / Author / Date

I insert classification level

BSC Backplane Cabling & BCSU Expansion

- Amit Joshi

2nd LA MBNL




Soc Classification level

AGENDA

After the module the participants will be enabled on below topics

• BSC Backplane Cable Checking

• How to perform BCSU expansion activity in BSC

• Pre-requisites for BCSU expansion

• Checks to be done after BCSU expansion

• Troubleshooting issues observed during BCSU expansion





BSC Backplane Cabling





Internal Cable Checking overview

Compare the internal cablingto the interconnection cableslist in Interconnect ion

Cables in Flexi BSC in SiteDocumentation to make surethat:

• The cable are connected tothe right position

• The connection are madeproperly

• The cables are installedand locked correctly


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Internal Cable Checking overview

• Internal cable checking table can be found in the Interconnection Cables in Flexi

BSC/BSC3i in RG20/RG10 Operating Document or Flexi BSC, Rel. S15, Site

Documentation.

• Path in NED is mentioned below

Reference ------> Hardware ------> Interconnection cables in Flexi BSC

• Kindly note that interconnection cabling document will vary as per BSC HW level

• Hence during troubleshooting purposes kindly ensure that BSC HW level is

first verified and then respective interconnection cables document is selected.




Internal Cable Checking – interconnection cable

The intracabinet cables include the followingcables:

• Power supply cables

• Alarm and timing cables

• Ethernet message bus cables

• Message bus cables

• SCSI cables

• Cables attached to cabling panel on the top of the

cabinet (small CPETx panels, CPRJ45-A)• PCM cables

• LAN cables

• Switch Control Bus (SCBUS) cables

• Supervision Bus (SBUS) cables

• Changeover Signal (CGS) cables

• Changeover (CG) cables

• Hotlink cables

• Synchronisation (SYNC) cables

• Cables between the BSCC cabinet and theoptional cabling cabinet (small and large CPETxpanels)

BSCC

Rear view





• The tables of the interconnection cables are intracabinet cables of the Flexi BSCand most of the intercabinet cables of the BSC3i.

• Each cable has its individual number. This number and the address of both endsof the cable are given.

• Both the name of the functional unit to which the end of the cable is connected,and its co-ordinate are given in a table. The columns in the tables are used asfollows:






Equipping No. shows the individual number of the cable. Both ends of the cable are marked with a

label with this number on it.

Cabinet shows the name of the cabinet where the cable is connected.

FU or Panel shows the name of the functional unit or panel where the cable is connected

Position or Connector shows the co-ordinate of the connector where the cable is connected.

Type shows the type number of the cable. The type of the cable and connectors are coded in the

first three or four letters and the length of the cable is shown in the following three numbers. The

length is given in centimeters if there is a letter C after the three numbers, and in decimeters if there is

no letter after the three number

Use shows the use of the cable.

Note shows the alternative configurations, if any.





Internal Cable Checking – how to identify cartridge, connector and cables

2 mm Hard Metric cartridges

Example :





BCSU EXPANSION PROCEDURE





Pre-requisites for BCSU expansion

• Latest Fallback availability in BSC. Check for any critical alarmin BSC.

• Availability of following Hardware: 1 CP816, 1 PSC6, 1 or 2PCU, 2 AS7_C or 1 AS7D at site.

• Availability of tools incase dummy SHIM plates have to beremoved.

• Jumper settings of the cards should be checked. Backplanepins should be checked with a torch.





BCSU expansion Procedure

• Insert Cards in respective tracks in BCSU cartridge. Jumper settings

should be as per documentation.

• Verify all LK’s( should have correct C-Num and capacity and feature

description as ordered)

• Create hardware for the BCSU. ( Refer hardware creation doc)

• FTP the Licence files and install them, verify licence state.

• Change state of newly created BCSU to TE-EX and Diagnose it with both

MCMU’s.

• Change state of newly created BCSU to SP-EX.

Checks :

• Give switchover to newly added BCSU with any existing BCSU which

has GB link created and SS7 link created, Check the state of Gb link andsignaling link.

• Verify if newly added BCSU is working fine in WO-EX.





LK Prerequisite

1. For TRX’s to be installed LK capacity = count of TRX being added. Below type ofLK’s would be required

For BSC3i

LICENCE CODE:..............BSC00088

LICENCE NAME:..............200TRX Basic SW license

For Flexi BSC

LICENCE CODE:.............. BSC00269LICENCE NAME:.............. 1TRX Basic SW license

If 1TRX Basic SW license is not installed we may face below issues

/*** DX Error 16767: “TRX CAPACITY LICENCE EXCEEDED ***/CAPACITYTYPE LICENCE CHECKED BSC WIDE"





LK Prerequisite

2. PCU LK

PCU2_DLICENCE CODE:..............BSC00031

LICENCE NAME:..............PCU2 OSW per logical PCU for Live

Capacity of LK = Capacity of logical indexes of PCU2_D card added

PCU2E

LICENCE CODE:..............BSC00031

LICENCE NAME:..............PCU2 Basic SW per 256 ch (Abis 16kbit/s)

1 PCU2E card =1024 channels.

Hence for 1 PCU2E card capacity required is 4.





BCSU Jumper setting check

Below jumper setting doc can be used as reference from NED.

Path in NED is mentioned below

Install ----> BSC/TCSM ----->

• Jumper Settings of the Plug-in Units in Flexi BSC

• Jumper Settings of the Plug-in Units in BSC 3i





BSC HW Creation Doc

Below HW creation doc can be used as reference from NED.

Path in NED is mentioned below

Install ----> BSC/TCSM ---->

• Creating and Managing BSC Hardware





Issues & Troubleshooting

Issue: BCSU failing diagnosis in PCUT or AS7

T/S steps to be taken :

• First diagnose BCSU with both MCMU’s to check if issue remains same.

• Next if diagnosis failing with both MCMU’s then verify jumper settings of failed

plug-in unit.

• If jumper setting found ok replace failed plug-in unit & check.

• If even after replacement of failed plug-in unit if issue persists kindly get backplanecabling verified of that respective plug-in unit. Also check for any pin bends in backplane

of cartridge.

• Suspected backplane cabling can be interchanged / swapped with non-used cable

of same cable type.

• Even after plug-in unit & backplane cable replacement if issue persists lastly

cartridge can be suspected. But before declaring cartridge faulty above mentionedchecks should have been performed thoroughly.

bsc backplane cabling & bcsu expansion_amit_joshi

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