VSC6134
Datasheet
2.4.3
2.4.4
2.4.5
2.4.6
2.4.7
2.4.8
2.4.9
K1 and K2 Generator .............................................................................................. 67
Line DCC (D4-D12) Generator................................................................................ 67
S1 Generator........................................................................................................... 69
M0 and M1 Generator and Error Insertion .............................................................. 69
E2 Generator........................................................................................................... 69
Reserve Line Overhead Bytes Insertion.................................................................. 69
Line Overhead Bypass............................................................................................ 69
2.4.10 Line Overhead Generator Registers ....................................................................... 69
Section Overhead Generator ................................................................................................ 70
2.5
2.5.1
2.5.2
2.5.3
2.5.4
2.5.5
2.5.6
2.5.7
2.5.8
2.5.9
A1 and A2 Generator .............................................................................................. 71
AIS-L Generator ...................................................................................................... 71
D1 to D3 (DCC) Generator...................................................................................... 72
E1 and F1 Generator............................................................................................... 73
B1 BIP-8 Generator................................................................................................. 73
J0 Generator ........................................................................................................... 73
Z0 Generator........................................................................................................... 73
Scrambler................................................................................................................ 74
Section Overhead Generator Registers .................................................................. 74
2.6
2.7
Rx Overhead Transport Extraction Block.............................................................................. 75
Forward Error Correction (FEC) Encoder ............................................................................. 78
2.7.1
2.7.2
2.7.3
2.7.4
2.7.5
Add Path Clock Crossing Buffer.............................................................................. 81
FIFO Spill Detection ................................................................................................ 84
Asynchronous Mapping........................................................................................... 85
BIP-8 Calculation..................................................................................................... 85
Digital Wrapper Overhead (DWOH) Generator....................................................... 85
2.7.5.1 Digital Wrapper Overhead-Generator Serial Interface............................... 85
2.7.5.2 FAS Generator........................................................................................... 87
2.7.5.3 MFAS Generator........................................................................................ 87
2.7.5.4 OTUk Section Monitor (SM)....................................................................... 88
2.7.5.5 Tandem Connection Monitoring (TCM)...................................................... 89
2.7.5.6 TCM Activation/Deactivation Coordination (TCM ACT)............................. 91
2.7.5.7 Path Monitor (PM) Overhead Generation .................................................. 92
2.7.5.8 Automatic Protection Switching and Protection Control Channel .............. 93
2.7.5.9 Fault Type and Fault Location Reporting Channel (FTFL) ........................ 93
2.7.5.10 GCCx Generation ...................................................................................... 94
2.7.5.11 Experimental Overhead (EXP)................................................................... 95
2.7.5.12 Reserved Overhead (RES)........................................................................ 95
2.7.5.13 OPUk Payload Structure Identifier (PSI).................................................... 96
2.7.5.14 OPUk Reserved Overhead (RES) ............................................................. 97
2.7.5.15 OPUk Justification Bytes............................................................................ 97
2.7.5.16 ODUk AIS Generation................................................................................ 97
2.7.5.17 ODUk OCI Generation............................................................................... 97
2.7.5.18 ODUk LCK Generation .............................................................................. 98
2.7.5.19 Generic AIS Generation............................................................................. 98
2.7.5.20 OTUk AIS Generation................................................................................ 98
2.7.5.21 NULL Client Generation............................................................................. 98
2.7.5.22 PRBS Test Signal Generation ................................................................... 98
Overhead Insertion and Maintenance Signals ........................................................ 98
Forward Error Correction....................................................................................... 100
2.7.7.1 Reed Solomon Encoding ......................................................................... 100
2.7.7.2 Enhanced FEC Encoder .......................................................................... 102
2.7.6
2.7.7
4 of 438
VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
