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.
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