PDH (.8-5): "-", " " "", , :
- PDH SDH ( );
- ATM- PDH ( ITU-T);
- SDH PDH SDH , PDH, SDH ( ITU-T).
.8-5. PDH: ) "-";
) "-" ; ) " "; ) "-" 1+1
"-"
. (. .8-5), L, , , 40 140 . .. 2500-3000 R (. .8-5). .. PDH.
" "
, .. () , , 1 (. .8-5). : , - ADM (, - "", ).
"1 + 1", (/ ), .8-5 "-". .
""
, - , , () (-) .
- PDH .8-6
.8-6. - PDH
PDH:
- 1300 1550 ;
- SSM - ;
- VC-n SDH;
- ATM (. . ITU-T G.804);
- TMN (PDH-SDH) ;
- 1+1;
- - 1 .
PDI-I (PDH+SDH). TMN, SDH.