363-206-295
A SONET Overview
Issue 1
December 1997
A-5
Each SONET layer has a set of overhead bytes as shown in Figure A-3. These
bytes carry information used by various network elements.
■
Section Overhead contains information that is used by all SONET
equipment including repeaters.
■
Line Overhead is used by all SONET equipment except repeaters.
■
Path Overhead is carried within the payload envelope.
— STS-1 path overhead remains with the STS-1 SPE until its
asynchronous signal is extracted (for example, DS-3) or until its
individual VT1.5 signals are demultiplexed.
— VTN (N= 1.5, 2, 3, or 6) path overhead remains with the VTN until
its asynchronous signal is extracted.
Figure A-3.
SONET Frame Format
Data Com
D9
Data Com
D6
H3
APS
K2
D3
F3
Multiframe
H4
User
F2
Channel
Signal Label
C2
Data Com
Path Status
G1
J0
Data Com
Orderwire
E2
K3
Data Com
Data Com
D12
Data Com
Pointer
Orderwire
User
F1
Data Com
N1
BIP-8
B3
Action
STS-1
STS-1 ID
D11
APS
Framing
Trace
J1
M0
S1
Data Com
D10
Data Com
D7
D8
Data Com
D4
D5
BIP-8
B2
K1
Pointer
H1
H2
Framing
A1
A2
BIP-8
B1
E1
Data Com
D1
D2
1
2
3
4
5
6
Section
Overhead
Line
Overhead
Path OH
Transport Overhead
3 Columns
STS-1 Synchronous Payload Envelope (STS-1 SPE)
87 Columns
STS-1 Frame Format
90 Columns
89
90
User
APS
TCM
Line REI
Synch. Status
Содержание DDM-2000 OC-12
Страница 1: ...363 206 295 Issue 1 December 1997 DDM 2000 OC 12 Multiplexer Release 7 0 User Service Manual Volume I ...
Страница 37: ...Tables xxxviii Issue 1 December 1997 A A SONET Overview A 1 SONET Payloads A 18 A 2 SONET Transport Rates A 19 ...
Страница 506: ...INS PROG 8 of 8 Page INS PROG COMMANDS RELATED rtrv eqpt rtrv ne OC 12 DDM 2000 1997 December 1 Issue 11 89 ...
Страница 528: ...RTRV ATTR ALM 2 of 2 Page RTRV ATTR ALM COMMANDS RELATED set attr alm OC 12 DDM 2000 1997 December 1 Issue 11 111 ...
Страница 565: ...RTRV OC3 3 of 3 Page RTRV OC3 COMMANDS RELATED rtrv sync 11 148 1997 December 1 Issue OC 12 DDM 2000 ...
Страница 664: ...SET FEAT 3 of 3 Page SET FEAT COMMANDS RELATED rtrv feat OC 12 DDM 2000 1997 December 1 Issue 11 247 ...
Страница 766: ... Ctl T TOGGLE 2 of 2 Page Ctl T TOGGLE COMMANDS RELATED logout rlgn OC 12 DDM 2000 1997 December 1 Issue 11 349 ...
Страница 847: ...Multiplexer OC 12 DDM 2000 7 Release TARP TOP Manual User Service II Volume 363 206 295 1 Issue 1997 December ...
Страница 867: ...363 206 295 TOP Maintenance and Operation BLANK LEFT INTENTIONALLY PAGE THIS 12 1997 December 1 Issue ...
Страница 1145: ...Order Circuit 363 206 295 NTP 029 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1146: ...Order Circuit 363 206 295 NTP 030 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1182: ...Turnup System 363 206 295 NTP 033 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1243: ...Clearing Trouble 363 206 295 TAP 107 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1393: ...363 206 295 DLP 513 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1394: ...363 206 295 DLP 514 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1456: ...363 206 295 DLP 523 7 of 7 Page 1997 December 1 Issue OC 12 via Access Broadcast Video for Cross connections of Example 4 Figure ...
Страница 1465: ...DLP 525 363 206 295 1997 December 1 Issue 6 of 2 Page Schematic Ring Virtual ATM Sample 1 Figure ...
Страница 1469: ...DLP 525 363 206 295 1997 December 1 Issue 6 of 6 Page Ring Virtual ATM OC 12 DDM 2000 for Cross connections of Example 4 Figure ...
Страница 1565: ...363 206 295 DLP 543 6 of 5 Page 1997 December 1 Issue Network Broadcast Video of Test Transmission 2 Figure ...
Страница 1566: ...DLP 543 363 206 295 1997 December 1 Issue 6 of 6 Page Network Ring Virtual ATM of Test Transmission 3 Figure ...