GSM (Global System for Mobile Communications)

GSM (Global System for Mobile Communications) is a Digital Wireless Technologyused for cell phone in the world that is, it is a cellular technology used for transmitting mobile voice and data services. It was developed by the European companies.

Features Of GSM

• It is 2G Technology
• GSM is a circuit-switched technology
• Uses GMSK [Gaussian Minimum Shift Keying] Modulation
• It supports FDMA & TDMA
• It uses SIM card so u can easily switch your SIM card between phones
• International roaming is easier on a GSM network
• In GSM every user requires a separate frequency channel for communication
• GSM accounts for 80% of total mobile phone technologies market

• The Frequency Band(range) in GSMThe frequency of the carrier is very important, because it determines the Size, power, efficiency of your mobile phones.

• It supports FDMA & TDMA as Multiple Access Techniques

SRC:HERE