(), ( paging - ), , ( , ) (), - , , - . , .
() . , , , . , ( ) . ( , - , .), , (, .).
, .. , , , . , , .
. 2, :
- (paging terminal- PT);
- (paging network controller- PNC);
- (operations and maintenance center- );
- (paging area controller- );
- (base station - BS);
- (pager- P).
( ). , , - , . , . . .
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. 2
, , . POCSAG, ERMES, FLEX.
POCSAG (Post Office Code Standardization Advisory Group - ), 1978., 1982. () . POCSAG 1,2 2,4 / 12,5...25 .
, , ERMES (European Radio Messaging System - ). ERMES 169,4...169,8 , 16 25 6,25 /.
FLEX ( ReFLEX InFLEXion), Motorola. , , .
, 20% . , 1990. 20 . , 1997. 100 . [13]. XXI . (, , .) .