TATAINDICOM

PREPAID BY :BHARGAV SHANKHALPARA

ESTABLISMENT

Tata Teleservices is part of the Tata Group.

Invented in 1996.

First launch CDMA mobile services in the Andhra Pradesh.

SERVICES PROVIDED BY TATA

• Telephony Services: Fixed and Mobile• Media and Entertainment Services:

Satellite TV• Data Services: Leased Lines, Dial-up

Internet, Wi-Fi and Broadband• Value-Added Services: Mobile and

Broadband Content/Applications, Calling Cards.

• Infrastructure Services: Submarine Cable Bandwidth, Terrestrial Fiber Network and Satellite Earth Stations.

SITE VISIT AT PIPALIA (MORBI)

PREPAID BY :BHARGAV SHANKHALPARA

BTS HAS A MAIN SECTIONS :

POWER SECTION POWER PLANT BTS MACHINE TOWER & ANTENNA

POWER SECTION : FIRST REQUIREMENT OF ANY BTS SITE IS POWER SUPPLY …

POWER SUPPLY IS GET FROM THREE WAYS :(1) GEB LINE(2) GENERATOR(3) BATTERYS

GENERATORWHICH PROVIDE POWER WHEN MAIN SUPPLY (COMES FROM GEB) IS FAILS…

POWER PLANT : POWER PLANT IS USED IN BTS TO OBTAIN -48V DC FROM 230V AC SUPPLY.

IN BTS -48V IS USED RESION BEHIND IT IS THAT

“Because 2 terminal comes out from the battery and through red wire we ground the +ive terminal so that possibility of noise interference will get zero....noise occur only in the +ive terminal.....thats why we use -ive voltage. “

POWER PLANT :

•

BTS OF AIRTEL(NOKIA)

RRI CARD

POWER CARD

BB2F CARD

BOIA CARD

DUPLEXER

Trx

COMBINER

BTS DIVIDE IN FOLLOWING UNITS:

(1) POWER CARDS(2) BB2F(3) Trx(4) BOIA CARD(5) ALARM EXTENSION SYSTEM(6) RRI CARD(7) COMBINER(8) DUPLEXER

POWER CARDS :

FIRST REGULATED -48 VOLT IS COMES FROM POWER PLANT AND IT GIVE FIRST TO POWER CARD ….

IT DISTRIBUTE SUPPLY TO ALL EQUIPMENT OF BTS.

BB2F CARD :

BB2F : FUNCTION OF BB2F IN NOKIA BTS IS DIGITAL SIGNAL

PROCESSING AND ALSO FREQUNCY HOPPING .

BB2F CARD CONNECT BOIA CARD TO TRx.

ONE BB2F CAN OPERATE 2 Trx.

THERE ARE THREE CONDITION OF BB2F WHICH IS DETECTED BY LEDS….

(1) GREEN - OK(2) ORANGE- DOWN(3) RED- FAULTY

Trx :

Trx :

Trx IS A EQUIPMENT WHICH HANDLE CALLS OF USER.

ONE Trx CAN HANDLE 16 CALLS PER SECOND.

WE CAN USE MAXIMUM 12 Trx ON ONE BTS.

IT IS DEPEND ON BB2F CARD WHICH MAXIMUM VALUE IS 6.

BOIA CARD : BOYA CARD IS USED FOR SOFTWARE PROGRAMMING .

BOIA CARD IS LIKE BRAIN OF BTS.

THERE ARE SERIAL PORT IN IT FOR CONNECT IT TO LEPTOP.

ALARM EXTENSION SYSTEM :

IT COLLECT WORKING STATUS OF VERIOUS UNITS BTS AD EXTEND THEM TO OPERATION & MAINTENANCE (O & M) MONITARING STATIONS.

RRI CARD : RRI CARD IS USED FOR

CONNECTION OF ODU (OUTDOOR UNIT).

THIS ANTENNA IS USED FOR MICROWAVE LINK WHICH CONNECT ONE BTS TO OTHER BTS…

COMBINER : COMBINER IS USED TO DIVERT

OVERLOAD CALLS OF ONE Trx TO ANOTHER Trx.

ONE COMBINER IS USED TO HANDLE TWO Trx.

DUPLEXER : DUPLEXER IS A DEVICE WHICH IS USED IN BTS TO USE SAME ANTENNA FOR TRANSMISSION AS WELL AS RECEIVER.

SO ANTENNA HAS TWO CABLE ONE FOR Tx & Rx WHICH CONNECT WITH DUPLEXER.

DUPLEXER :

TOWER & ANTENNA :

TOWER IS USED TO GIVE HEIGHT TO ANTENNA. HEIGHT OF TOWER IS 40m TO 75m.

ANTENNA :

THERE TWO ANTENNA IS USED IN BTS.

ONE FOR TRANSMISSION & RECEPTION OF USER’S SIGNALS WHICH IS CALLED GSM ANTENNA.

SECOND ANTENNA IS MICROWAVE ANTENNA WHICH IS USED TO GET & FORWARD LINK FROM OTHER BTS.

SECOND ANTENNA IS ALSO CALLED AS DRUM ANTENNA.

GSM ANTENNA :

MICROWAVE ANTENNA :

CALL PROCESS IN UPLINK :

1. Uplink Path GSM antenna.2. Dual Variable Gain Duplex Filter (DVxx) unit. 3. Multicoupler (M2xx and M6xx). 4. TRx(transceiver).5. BB2F Card for DSP.6. Transmission (VXxx) unit.7. To BSC through Microwave Antenna

CALL PROCESS IN DOWNLINK :

1. Downlink Path From BSC through Microwave Antenna

2. Transmission unit(VXxx).3. BB2F Card for DSP.4. TRX (Transceiver).5. Wideband Combiner unit (WCxx).6. Duplexer.7. GSM antenna, which passes the signal through

the Air interface to the MS

SITE VISIT : TATA

• Problem : Rajkot MSC was not getting connectivity from Junagadh.

• Solution : Then by ping address of all the BTS in Junagadh

connectivity is checked, we found the faulty BTS then it was found that GLI card of that BTS was damaged which was replaced afterwards.

New Invention of TATA in Feature

THANK YOU