(Synchronous Digital Hierarchy, SDH) , . SDH , , , , , .
SDH (semipermanent) (provisioning) SDH, , SDH . - SDH - (cross~connect), , j
SDH , (Time Division Multiplexing, TDM), , , ^
SDH ( ) , - (Plesiochronous Digital Hierarchy,!PDH). SDH . 6.4.
SDH , .
o , (add, insert) (drop) , , . , .
□ . SDH , , , ,
. 50 .
□ , . , , .
□ , . TDM, SDH, , !
|
|
-
- |
- SDH
- PDH
- SOH
- PDH
. 6.4. SDH
SDH , . , SDH DWDM, . DWDM SDH , , :;: PDH SDH. SDH , , . , . .