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  GSM

Ãëîáàëüíà ñèñòåìà ìîá³ëüíîãî çâ'ÿçêó (àíãë. Global System for Mobile Communications, GSM) — ì³æíàðîäíèé ñòàíäàðò äëÿ ìîá³ëüíîãî öèôðîâîãî ñò³ëüíèêîâîãî çâ'ÿçêó ç ðîçä³ëåííÿì êàíàëó çà ïðèíöèïîì TDMA òà âèñîêèì ð³âíåì áåçïåêè çà ðàõóíîê øèôðóâàííÿ ç â³äêðèòèì êëþ÷åì. Ñòàíäàðò áóâ ðîçðîáëåíèé ï³ä ïàòðîíàòîì ªâðîïåéñüêîãî ³íñòèòóòó ñòàíäàðòèçàö³¿ åëåêòðîçâ’ÿçêó (ETSI) íàïðèê³íö³ 80-õ ðîê³â.
Á³ëüø³ñòü ìåðåæ GSM ïðàöþþòü ó ä³àïàçîí³ 900 ÌÃö àáî 1800 ÌÃö. Äåÿê³ êðà¿íè Àìåðèêè âèêîðèñòîâóþòü ä³àïàçîíè 850 ÌÃö òà 1900 ÌÃö, îñê³ëüêè ñòàíäàðòí³ ä³àïàçîíè 900 òà 1800 ÌÃö çàéíÿò³ ³íøèìè ñèñòåìàìè.

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