A Multiplexing Structure, Frame Structure and Overhead Byte. Multiplexing Structure. Frame Structure. Multiplexing structure

Страницы работы

12 страниц (Word-файл)

Содержание работы

Contents

A Multiplexing Structure, Frame Structure and Overhead Byte A-1

A.1 SDH                                                                                          A-1

A.2 Multiplexing Structure                                                                 A-2

A.3 Frame Structure                                                                         A-3

A.4 SOH                                                                                          A-4

A.4.1 STM-1 SOH                                                                       A-4

A.4.2 STM-4 SOH                                                                       A-5

A.4.3 STM-16 SOH                                                                     A-6

A.4.4 STM-64 SOH                                                                     A-7

A.4.5 SOH Bytes                                                                         A-8

A.5 POH Bytes                                                                                 A-9

A.5.1 VC-3/VC-4/VC-4-xc Higher Order POH Bytes                      A-9

A.5.2 VC-12 Lower Order POH Bytes                                           A-9


Figures

Figure A-1 Multiplexing structure                                                                   A-2

Figure A-2 SDH frame structure                                                                    A-3

Figure A-3 STM-1 SOH                                                                                 A-4

Figure A-4 STM-4 SOH                                                                                 A-5

Figure A-5 STM-16 SOH                                                                               A-6

Figure A-6 STM-64 SOH                                                                               A-7


Tables

Table A-1 SDH transmission rate level                                                           A-1

Table A-2 SOH byte                                                                                      A-8

Table A-3 VC-3/VC-4/VC-4-xc higher order POH bytes                                    A-9

Table A-4 VC-12 lower order POH bytes                                                         A-9


A Multiplexing Structure, Frame Structure and Overhead Byte

This appendix covers the processing of the synchronous digital hierarchy (SDH), multiplexing structure, frame structure and overhead byte that are applicable to the OptiX OSN 9500.

A.1  SDH

The first rate level of SDH signal is 155520 kbit/s, and signals at higher rate levels can be formed by byte interleaving and multiplexing in the proportion of N (N=4, 16, 64…). See Table A-1.

Table A-1 SDH transmission rate level

SDH

Bit rate (kbit/s)

STM-1

155520

STM-4

622080

STM-16

2488320

STM-64

9953280


A.2  Multiplexing Structure

Multiplexing and multiplexing structure of various services on the OptiX OSN 9500 are shown in Figure A-1.

Figure A-1 Multiplexing structure


A.3  Frame Structure

Figure A-2 shows the SDH frame structure.

Figure A-2 SDH frame structure


A.4  SOH

A.4.1  STM-1 SOH

Figure A-3 shows the STM-1 SOH structure.

Figure A-3 STM-1 SOH


A.4.2  STM-4 SOH

Figure A-4 shows the STM-4 SOH structure.

Figure A-4 STM-4 SOH


A.4.3  STM-16 SOH

Figure A-5 shows the STM-16 SOH structure.

Figure A-5 STM-16 SOH


A.4.4  STM-64 SOH

Figure A-6 shows the STM-64 SOH structure.

Figure A-6 STM-64 SOH


A.4.5  SOH Bytes

Table A-2 SOH byte

Byte

Description

A1 and A2

Framing byte. A1 = F6H, A2 = 28H

B1

Regenerator section (RS) bit error monitoring byte BIP-8

B2

MS bit error monitoring byte BIP-24 x N

D1, D2 and D3

RS DCC, 192 kbit/s

D4–D12

MS DCC, 576 kbit/s

E1

RS orderwire communication byte, 64 kbit/s

E2

MS orderwire communication byte, 64 kbit/s

F1

Data/speech channel of network provider

H1 and H2

Administrative unit pointer

H3

Negative pointer justification byte

J0

RS trace byte

K1 and K2

MS automatic protection switching (APS) byte

M1

MS remote error indication byte

S1

Synchronization status byte (b5–b8)

Others

Defined in future use


A.5  POH Bytes

A.5.1  VC-3/VC-4/VC-4-xc Higher Order POH Bytes

Table A-3 VC-3/VC-4/VC-4-xc higher order POH bytes

J1

Higher order path trace byte

B3

Higher order bit error monitoring byte BIP-8

C2

Higher order path signal label byte

G1

Path status byte

F2

Higher order user path byte

H4

Multiframe position indication byte

F3

Higher order user path byte

K3

APS byte

N1

Network operator byte

Note: VC-4 POH locates at the first column of the VC-4 structure at Column 261, Row 9.

VC-4-xc POH locates at the first column of VC-4-xc (concatenated by X x VC-4s) at Column 261*X, Row 9.

A.5.2  VC-12 Lower Order POH Bytes

Table A-4 VC-12 lower order POH bytes

V5

Lower order path bit error, signal identifier and path status

J2

Lower order path trace byte

N2

Network operator byte

K4

APS byte and Lower order remote defect indication

Похожие материалы

Информация о работе