Gsm ppt
- 2. OVERVIEW OF MTNLMTNL was set up on 1st April, 1986 by government of India to upgrade the quality of telecom services.WEBSITE-http:// www.mtnl.net.in
- 3. WHAT IS GSM ?Global system for mobile communication , a mobile phone system based on multiple radio cells.Two main standards :-GSM 900 – Designed for extensive radio coverage in rural areasDCS 1800 – Designed for radio coverage in areas with very high subscriber density
- 4. WHAT IS GPRS?It is new non voice value added services that allows information to be sent and received across a mobile telephone network.
- 5. WHAT IS AN EDGE?Edge- Enhanced data rates for global evolution.It is 3G technology that delivers broadband. It allows consumers to connect to the Internet and send & receive data.
- 6. GSM( Global system for mobile communication )SMART AND SECURE GSM is so secure & flexible with its functionalities & so easy to manipulate.GSM subscribers are identified by their SIM card.
- 7. SIM CARD-SIM is removable.Subscriber inserts it in mobile station unit.
- 8. Provide PIN,which is compared with PIN stored within the SIM.GSM TELECOMMUNICATION SERVICESServices offered to GSM subscriber are:Bearer services( For data only )
- 9. Tele services ( For voice & data )- Supplementary services
- 10. CHARACTERISTICS FOR GSMFrequency band
- 11. Duplex Distance
- 13. Modulation
- 15. Access MethodGSM FREQUENCIESFREQUENCY RANGEGSM900 880-915 MHz paired with 925-960MHzGSM1800 1710-1785MHz paired with 1805-1880MHzGSM1900 1850-1910MHz paired with 1930-1990MHz
- 16. GSM ARCHITECTURE
- 17. GSM ARCHITECTUREGSM system is basically designed as combination of 3 subsystems:Switching subsystem ( SSS )
- 18. Radio subsystem ( RSS )
- 19. Operation and maintenance subsystem (OMS )COMPONENTS OF RSSRSS consists of :Mobile Equipment (ME)
- 21. Radio Interface (Um)BS includes :Base Transceiver Station (BTS)
- 22. Base Station Controller (BSC)
- 23. Transcoding & Rate Adaptation Unit (TRAU)COMPONENTS OF SSSSSS Consists Of :Mobile Services Switching Centre (MSC)
- 24. Home Location Register (HLR)
- 25. Visitor Location Register (VLR)
- 27. Equipment Identification Register (EIR)OMS ( OPERATION & MAINTENANCE CENTER )An OMS consists of one or more operation & maintenance center.-The OMC is connected to all equipment in the switching system & to the BSC. -The implementation of OMC is called the operation and support system (OSS). -The OSS is the functional entity from which n/w operator controls the system.
- 29. NETWORK AREACELL: is the area covered by one base transceiver station.Location Area: is the group of cells.MSC/ VLR service area: represents the part of GSM network that is covered by one MSC.
- 30. VALUE ADDED SERVICES-Call Waiting-Call Divert-Voice Response Services-Mail
- 31. JOINT VENTURES OF MTNL-United Telecom Limited (UTL) Mahanagar Telephone Mauritius Limited (MTML)
- 32. MTNL-STPI IT Services Limited