(LA)
1.6. GSM
. 1.7, 1.8 .
. 1.7 .
. 1.7 . |
. 1.8 .
. 1.8 - . |
GSM
GSM : 900, 1800, 1900 .
900
. 1.9 GSM |
GSM 900 . . , . E-GSM R-GSM, P-GSM (primary).
P-GSM900 890-915/915-960 MHz
E-GSM900 880-915/925-960 MHz
R-GSM900 890-920/915-970 MHz
1800
1990 . , United Kingdom GSM, 1800. . , , , . , , . 1800 : GSM 1710-1805/1785-1880 MHz
1997 1800 Digital Cellular System (DCS) 1800 MHz, GSM 1800.
1900
1995 PCS ( ). , , . PCS , , . , PCS, 1900 . GSM 900 - , , GSM 1900 . GSM 1900 GSM 900 , GSM 1900 ANSI.
GSM 800
800 TDMA (AMPS D-AMPS). GSM 1800 , .
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|
2 .
2 -
P-GSM 900 | E-GSM 900 | R-GSM 900 | GSM 1800 | GSM 1900 | |
Uplink | 890 915 | 880 - 915 | 890 925 | 1710 1785 | 1850 1910 |
Downlink | 935 960 | 925 - 960 | 935 970 | 1805 1880 | 1930 1990 |