Introduction and History of GSM:-
Before 1980, there was 6 different incompatible analog cellular system standards working in Europe. However with the growth of European Common Market ( ECM) roaming between European countries became necessity and it was too difficult to business person to carry 6 handset and 6 SIM. So in 1982, CEPT(Conference of European Post & Telecommunication ) made a committee named GSM.
- GSM (Groupe Special Mobile), also known as Global System for Mobile communication.
- Developed by European Telecommunication Standard Institute(ETSI).
- GSM is a set of ETSI standards specifying the infrastructure for a digital cellular service.
- In 1986, task force was formed to resolve roaming problems in 1G analog systems.
- In 1987, a memorandum of understanding (MoU) was signed.
- In 1989, ETSI included GSM in its domain and also name was changed from Groupe Special Mobile to Global System for Mobile communication .
- In 1990, GSM First page specification was published
- In 1991, the specification of the standard was completed and commercial launched.
- In 1992, the first deployment of GSM started and India adopt GSM.
- By the year 1993, thirty two operators in 22 countries adopted the GSM standard.
- By the year 2001, close to 150 countries had adopted GSM for cellular adaptation.
- GSM specifications define the functions and interface requirements in details but do not address the hardware.
- GSM is an open ended technology i.e. upgradable.