. , , RS-232 ( V.24). , , , G.703.
, .
G.703 1972 , 1984 1988., PDII. 1991. STM-1 SDH (155,52 /) 1998., 2001 , :
- SDH STM-0 (51,84 /);
- 3152 / (Appendix III), ITU-T G.931;
- .13 ( 2048 /);
- .4,9,10 11 : 64,2048,8448 34368 /.
-
G.703 PDH SDH.
3.4.1. G.703
G.703 / .
, (64 /), (.4), - , PDH :
[, /]: 1544, 11 (.5); 3152 (Appendix III); 6312, 21 (.6); 44736, 32(.8);
[, /): 2048, 12 (.9); 8448, 22 (.10); 34368, 31 (.11); 139264, 4(.12);
[, /]: 32064 (.7); 97728 (. 14) ( ).
. 13 2048 , 12.
STM- 1 (ES1, 155,52 /) STM-0 (51,84 /) SDH ( . G.957).
n 64 / (n=2,3,...,31) , 2048 /. AC T1 (1544 /), n=2,3,...,23 - , 1544 /.
G.703 :
- 3 64 /;
- ;
- , . ;
() - (G.703);
- /;
() - 75 ();
-100-120 ();
- , .
( ) - G.823.
, , .