GSM-900 (Global System for Mobile Communications) 890960 . GSM-1800 , , , , . , , . , , . . . ( GSM-1800), . . 35 . 0.820 . 1.1 , GSM-900.
2.1 GSM-900
20 | 320 | |
8 | 160 | |
5 | 80 | |
2 | 40 | |
0,2 | 20 | |
10 | ||
5 | ||
2,5 |
GSM, 1800 , , GSM-900. , GSM-1800 1 ( 8 GSM-900, 2) 0.25 ( 5), 20 ( 1) 2 ( 4), . GSM-900 1, . , , , . GSM-900 ( 35 ).
900 , 890915 , , 935960 . , . 1.2.
1.2 GSM-900
(Rise), - (Fall). , , , 45 . 124 (124 124 , 45 ) 200 . 0 123. 16 , . , (N) 200 , ( 0 7), .
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(FDMA) 124 25, , , (TDMA) 8 . GSM GMSK-, 217 , . , , , , , .