GSM

GSM (Global System for Mobile Communications)

GSM, or Global System for Mobile Communications, is a digital mobile telephony standard that has revolutionized wireless communications worldwide.

What is GSM?

GSM is a second-generation (2G) mobile communications standard developed by the European Telecommunications Standards Institute (ETSI). It uses time-division multiplexing (TDMA) technology to enable multiple users to share the same frequency.

Key features :

• Frequencies: Operates mainly on the 900 MHz and 1800 MHz bands
• Capacity: divides each 200 kHz channel into eight 25 kHz time slots
• Services: Voice, SMS, data (with GPRS and EDGE)
• Coverage: Cellular network with different cell sizes (macro, micro, pico)