What is GSM?

GSM (Global System for Mobile communications) is an open, digital cellular technology used for transmitting mobile voice and data services. GSM differs from first generation wireless systems in that it uses digital technology and time division multiple access transmission methods. GSM is a circuit-switched system that divides each 200kHz channel into eight 25kHz time-slots. GSM operates in the 900MHz and 1.8GHz bands in Europe and the 1.9GHz and 850MHz bands in the US. The 850MHz band is also used for GSM and 3GSM in Australia, Canada and many South American countries. GSM supports data transfer speeds of up to 9.6 kbit/s, allowing the transmission of basic data services such as SMS (Short Message Service). Another major benefit is its international roaming capability, allowing users to access the same services when travelling abroad as at home. This gives consumers seamless and same number connectivity in more than 210 countries. GSM satellite roaming has also extended service access to areas where terrestrial coverage is not available.

 
Number of Connections, GSM
Market Q4 2006 Q2 2007 Q4 2007 Q2 2008
World 2,190,084,047 2,432,990,168 2,709,900,985 2,925,454,308
Africa 195,832,145 232,061,178 273,079,330 306,485,511
Americas 218,384,266 255,639,490 302,471,377 338,342,270
Asia Pacific 825,958,067 949,496,716 1,082,653,571 1,219,674,193
Europe: Eastern 339,735,325 361,706,937 395,030,491 401,945,699
Europe: Western 390,738,824 390,666,845 389,712,986 370,819,907
Middle East 128,538,868 148,180,842 170,277,699 190,634,697
USA/Canada 90,896,552 95,238,160 96,720,693 97,552,031

Figures supplied by Wireless Intelligence www.wirelessintelligence.com

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