1. (PDH).
2. PDH .
3. , SDH PDH.
4. PDH / 2 / 140 /.
: 2 :
1. (/ PDH)
2. / PDH
3. (SDH)
1. , .
2. , .
3. / 2 / 140 / PDH.
1. .. SDH. .: -, 1997. 148.
2. .., .. . .: , 1985. 208.
3. " -1 / -1". : , . , 2014.
4. " -1 / -1".
5. " -1 / -1". : , . , 2014.
( )
1. (/ PDH Plesiochronous Digital Hierarchy). 80- . , , , . , 1544 /. DS O.
, , DS O. , 2,048 /. , DSO.
PDH .
(.1: .7, 8, 2022, 134143; .2; .3: 2; .4, 5).
2. / PDH. . , PDH - 140 /.
.
PDH. / 2 /, 140 / PDH. . , .
|
|
. PDH.
(.1: . 7, 8, 2224, 134143; .2; .3: 2; .4, 5).
3. (/ SDH Synchronous Digital Hierarchy). . . SONET/SDH . . .
, , , , , , , , , . (.1: .7, 8, 2528, 129132, 134...143; .2; .3: 2; .4, 5).
1. , (PDH /): , , , PDH.
2. .
3. , ?
4. .
5. / / ..
6. " " ?
7. / 2 / 140 / .
8. , .
9. DS 1,2,3,4; DSJ 3,4; E 1,2,3,4; DS 0; 1,2,3,4 ..?
10. ?
11. , SDH.
12. : , , , , ...
13. PDH SDH.
14. SDH, PDH, ATM, ARCnet, Ethernet, FDDI, TokenRing, SONET, ISDN, B-ISDN, Frame Relay, Fast Ethernet, l00 VG - Any LAN, X. 25 .?
1. (/ PDH), / PDH.
2. .
3. (10...15¢) .
04. " (SDH) () / Synchronous Digital Hierarchy (SDH) "
1. (/ SDH).
2. , .
3. .
4. SDH.
|
|
5. SDH .
: 2 :
1. SDH.
2. SDH.