Nokia Flexi BTS Swap Procedure

Shahzad Rashid

NOC Executive Engineer (TXN)

Telenor Pakistan

Contents

Transmission Shifting

Flexi BTS Installation

Flexi BTS Commissioning

Cross-Connections at BTS and BSC end

Swapping Procedure

• Transmission Shifting

Transmission shifting involves:

Shifting of Siemens MW PDH Radios modems from Indoor shelter to Outdoor shelter

Connecting all the Siemens MW PDH Radios equipment as were in Indoor Shelter (Cross-Patching Radios)

Connecting IF cables b/w MW Dishes and Modems (SRAL XD)

Loop-Testing to check Transmission media and PCMB

Patching 2 E1’s b/w Flexi BTS and MW radios (One E1 for 900 and one for 1800 band)

• Flexi BTS Installation

Flexi BTS installation involves:

Outdoor shelter as Flexi BTS is Water Proof, Temp resistant up to 50 degree C (approx)

Connecting of TRX’s with Duplexers (ERGA Duplexer for GSM and ERDA Duplexer for DCS)

Connecting ESMA with Duplexers (and ESEA for extended TRX’s) (ESMA/ ESEA are its processors)

Connecting power cables to Duplexers, TRX’s and ESMA

Performing VSWR (voltage standing wave ratio) testing of Feeder cables to check cable faults

Connecting Feeder cables to Flexi BTS via jumpers to adjust Feeder cables length

Alarm Patching

Powering Up

• Flexi BTS Commissioning

Flexi BTS Commissioning involves:

Connecting to Flexi BTS to laptop

Configuring TRX’s and Sectors via Flexi BTS user interface

Configuring Abis Plan via same user interface

Cross-Connections b/w Flexi BTS and Siemens MW PDH

Cross-Connections changing from Siemens BSC to Nokia BSC

Loop-testing to check Transmission media and new ET at Nokia BSC end

Thanks for Viewing and Please find below related Photographs

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Siemens MW Radio Modem (SRAL XD)

DDF for Cross-Patching of Modems

IF Cables

Felxi BTS Duplexer and TRX's

Jumper Cables connected to Feeder Cables

Outdoor Shelter