, / | , m* | , | , | , f () *** | |||
1 | 50 | AMI | 120** | 3,00 | 0-6 (f = 1024) | ||
2 | 30 | HDB3 | 2,37 | 0-6 (f = 4224) | |||
3 | 20 | HDB3 | 1,00 | 0-12 (f = 17184) | |||
4 | 15 | CMI | 1,00 | 0-12 (f = 70 ) |
:
1. ?
2. .
3. .
4. .
5. PDH.
6. PDH .
7. 2?
8. 4?
9. 3?
10. 1?
:
1. 2?
) 32; ) 30; ) 120; ) 480; ) 1920.
2. 4?
) 32; ) 30; ) 120; ) 480; ) 1920.
3. 3?
) 32; ) 30; ) 120; ) 480; ) 1920.
4. 1?
) 32; ) 30; ) 120; ) 480; ) 1920.
5. ?
) , , ; ) , ;
) , ; ) , ; ) , .
6. :
) ; ) PDH;
) PDH; ) PDH SDH; ) PDH, SDH IP.
: . ()
, .
: . 1 . 240 252
Ққ | ғ | |
Local | ||
Peculiarity, feature | ||
Path | ||
қ | Plesiochronous Digital Hierarchy -PDH | |
ққ қ | ITU: International Telecommunications Union | |
Қ | . . | Link |
қ | Synchronous Digital Hierarchy SDH | |
ң қғ | - . | Traffic. |
Ө ғ | , 64 / 2 /. | Wideband |
8.1. :
1. .. , , 1988.
|
|
1 . 240-270
HAND OUTS | |
2 9 1 . | 2 1 2, 09--609-3. 2016--2017 |
SDH
SDH . , , . , ITU-T :
G.707 SDH;
G.708 SDH;
G.709 ;
G.782 - SDH;
G.783 - SDH;
G.784 - SDH;
G.803 - (SDH);
G.957 - , SDH;
G.958 - SDH - .
SDH , :
- , ;
- .
SDH : .
SDH :
- , ;
- TMN;
- , SDH, .
SDH:
- ;
- () ;
- . SDH PDH ;
- . :
o - , ;
o , ;
- ;
- SDH TMN (Telecommunication Management Network);
- - ;
- . STM-1;
- , .
SDH:
- STM-1 3 34 /, STM-1 3;
- , PDH;
- .
SDH , ITU-T G.803 SDH, G.805 , , .
|
|
SDH
SDH (NE Network Element):
- :
o / (ADM Add/Drop Multiplexer);
o (TM Terminal Multiplexer);
- - (DXCS Digital Cross-Connect System);
- (Reg Regenerator).
4.1. .
SDH .
SDH , PDH . , . SDH , , .
SDH :
- TM;
- / ADM.
: () . , .
TM / , STM-N NE ADM - DXCS.
/ ADM , , :
- ;
- ("" "") ;
- .
ADM .
: () . , .
-.
SDH. :
- STM-N (. .);
- (..);
- (..).
. . .
-:
.
, , STM-N, SDH.
:
1. ?
|
|
2. .
3. .
4. .
5. PDH.
6. PDH .
7. 2?
8. 4?
9. 3?
10. 1?
:
1. 2?
) 32; ) 30; ) 120; ) 480; ) 1920.
2. 4?
) 32; ) 30; ) 120; ) 480; ) 1920.
3. 3?
) 32; ) 30; ) 120; ) 480; ) 1920.
4. 1?
) 32; ) 30; ) 120; ) 480; ) 1920.
5. ?
) , , ; ) , ;
) , ; ) , ; ) , .
6. :
) ; ) PDH;
) PDH; ) PDH SDH; ) PDH, SDH IP.
: . ()
, .
: . 1 . 240 252
Ққ | ғ | |
Local | ||
Peculiarity, feature | ||
Path | ||
қ | Plesiochronous Digital Hierarchy -PDH | |
ққ қ | ITU: International Telecommunications Union | |
Қ | . . | Link |
қ | Synchronous Digital Hierarchy SDH | |
ң қғ | - . | Traffic. |
Ө ғ | , 64 / 2 /. | Wideband |
8.1. :
1. .. , , 1988.
1 . 240-270
HAND OUTS | |
2 10 1 . | 2 1 2, 09--609-3. 2016--2017 |