1
Scope
2 References
3 Terms and definitions
4 Abbreviations
5 Conventions
5.1 SDH-Specific transmission layer
names
5.2 Performance and reliability
6
Supervision
6.1 Trail termination point mode and port mode
6.2 Defects
6.2.1 Continuity supervision
6.2.2 Connectivity supervision
6.2.3 Signal quality supervision
6.2.4 Payload type supervision
6.2.5 Alignment supervision
6.2.6 Maintenance signal supervision
6.2.7 Protocol supervision
6.3 Consequent actions
6.4 Defect correlations
6.5 One-second performance monitoring
filter
6.5.1 Pointer Justification Counts (pPJC+, pPJC–)
7 Information flow (XXX_MI) across
the XXX_MP reference points
8 Generic processes
8.1 Line coding and scrambling processes
8.1.1 STM-N scrambling and descrambling
8.2 Alignment processes
8.2.1 STM-N frame alignment
8.2.2 Lower order VC-1, VC-2 multiframe alignment
8.2.3 Lower order VC-1, VC-2 extended overhead multiframe alignment
8.2.4 Tandem Connection multiframe alignment
8.2.5 Virtual concatenation multiframe alignment
8.3 Signal quality supervision
processes
8.3.1 Tandem connection BIP violation
determination
8.3.2 Tandem connection incoming error code determination
8.4 BIP correction processes
9 STM-N Physical section layer (N =
1, 4, 16, 64, 256)
9.1 Connection functions
9.2 Termination functions
9.2.1 STM-N Optical Section Trail Termination OSn_TT
9.2.2 STM-1 Electrical Section Trail Termination ES1_TT
9.3 Adaptation functions
9.3.1 STM-N Optical Section to Regenerator Section Adaptation OSn/RSn_A
9.3.2 STM-1 Electrical Section to Regenerator Section Adaptation ES1/RS1_A
9.4 Sublayer functions (N/A)
10 STM-N Regenerator Section Layer (N = 1, 4, 16, 64, 256)
10.1 Connection functions
10.2 Termination functions
10.2.1 STM-N Regenerator Section Trail Termination RSn_TT
10.3 Adaptation functions
10.3.1 STM-N Regenerator Section to STM-N
Multiplex Section Adaptation RSn/MSn_A
10.3.2 STM-N Regenerator Section to DCC Adaptation RSn/DCC_A
10.3.3 STM-N Regenerator Section to Orderwire Adaptation RSn/OW_A
10.3.4 STM-N Regenerator Section to User channel Adaptation RSn/User_A
10.3.5 STM-N Regenerator Section to Auxiliary bytes Adaptation RSn/AUX_A
10.3.6 STM-N (N ³ 16)
Regenerator Section to STM-N Multiplex Section Adaptation supporting FEC
10.4 Sublayer functions
11 STM-N Multiplex Section Layer (N = 1, 4, 16, 64, 256)
11.1 Connection functions
11.2 Termination functions
11.2.1 STM-N Multiplex Section Trail Termination MSn_TT
11.3 Adaptation functions
11.3.1 STM-N Multiplex Section to Sn layer Adaptation MSn/Sn_A
11.3.2 STM-N Multiplex Section to DCC Adaptation MSn/DCC_A
11.3.3 STM-N Multiplex Section to
Orderwire Adaptation MSn/OW_A
11.3.4 STM-N Multiplex Section to Synchronization Distribution Adaptation
MSn/SD_A
11.3.5 STM-N Multiplex Section to S4-Xc layer Adaptation MSn/S4-Xc_A
11.3.6 STM-N Multiplex Section to Auxiliary bytes Adaptation MSn/AUX_A
11.4 Sublayer functions
11.4.1 STM-N Multiplex Section Linear Trail Protection functions
11.4.2 STM-N Multiplex Section 2-Fibre Shared Protection Ring Functions
11.4.3 STM-N Multiplex Section 4-Fibre Shared Protection Ring Functions
12 VC-n Path (Sn) Layer (n
= 4-X, 4, 3-X, 3)
12.1 Connection functions
12.1.1 VC-n Layer Connection Sn_C
12.2 Termination functions
12.2.1 VC-n Layer Trail Termination Sn_TT
12.2.2 VC-n Layer non-intrusive monitor
12.2.3 VC-n Layer Supervisory-Unequipped
Termination Sns_TT
12.3 Adaptation functions
12.3.1 VC-n Layer to VC-m Layer Adaptation Sn/Sm_A
12.3.2 VC-n Layer to Pqx Layer Adaptation Sn/Pqx_A
12.3.3 VC-n Layer to User channel Adaptation Sn/User_A
12.3.4 VC-n Layer to ATM VP Adaptation Sn/Avp_A
12.3.5 VC-n Layer to HDLC Adaptation Sn/HDLC_A
12.4 Sublayer functions
12.4.1 VC-n Layer Trail Protection
Functions
12.4.2 Option 2 Tandem Connection sublayer Functions
12.4.3 Option 1 Tandem Connection sublayer functions
12.5 Virtual concatenation functions
12.5.1 Virtual concatenated VC-n path layer functions Sn-Xv (n = 3, 4; X ³ 1)
12.5.2 Interworking functions
13 VC-m Path (Sm) Layer (m
= 2, 12, 11)
13.1 Connection functions
13.1.1 VC-m Layer Connection Sm_C
13.2 Termination functions
13.2.1 VC-m Layer Trail Termination Sm_TT
13.2.2 VC-m Layer non-intrusive monitor
13.2.3 VC-m Layer Supervisory-Unequipped Termination Sms_TT
13.3 Adaptation functions
13.3.1 VC-m Layer to Pqx and Pqs layer Adaptation Sm/Pqx_A, Sm/Pqs_A
13.3.2 VC-m Layer to ATM VP Adaptation Sm/Avp_A
13.3.3 VC-m Layer to RFI Adaptation Sm/RFI_A
13.4 Sublayer functions
13.4.1 VC-m Layer Trail Protection Functions
13.4.2 VC-m Tandem Connection Sublayer Functions
13.5 Virtual Concatenation Functions
13.5.1 Virtual concatenated VC-m path layer
functions Sm-Xv (m = 11, 12, 2; X ³ 1)
14 Timing functions
15 Specification of jitter and wander
15.1 STM-N interfaces
15.1.1 Input jitter tolerance
15.1.2 Output jitter generation
15.1.3 Jitter and wander transfer
15.1.4 Pattern dependence testing
15.2 PDH interfaces
15.2.1 Input jitter and wander tolerance
15.2.2 Jitter and wander transfer
15.2.3 Jitter and wander generation
15.3 Jitter and wander measurement
16 Overhead access function (OHA)
Annex A – Algorithm
for pointer detection
A.1 Pointer interpretation
A.1.1 AU-n/AU-4-Xc
A.1.2 TU-n
A.2 Concatenated payloads
A.3 Pointer processing flow chart
Appendix I – Example
of F1 byte usage
Appendix
II – Data communications channel (DCC)
Appendix III – STM-16
regenerator functional model (example)
Appendix IV – STM-N
transparent regenerator
Appendix V –
Verification of SDH equipment CID immunity
V.1 Background
V.2 Method
V.2.1 Generation of CID
V.2.2 Interpretation
Appendix VI –
Enhanced Remote Defect Indication operation
VI.1 VC-4-Xc/VC-4/VC-3 paths
VI.2 VC-2/VC-1 paths
VI.3 Interworking functions
VI.3.1 VC-4-Xc to VC-4-Xv
VI.3.2 VC-4-Xv to VC-4-Xc