CONTENTS

 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   
        6.3     Consequent actions
        6.4     Defect correlations 
        6.5     One-second performance monitoring filter  
 7     Information flow (XXX_MI) across the XXX_MP reference points          
 8     Generic processes           
        8.1     Line coding and scrambling processes        
        8.2     Alignment processes          
        8.3     Signal quality supervision processes
        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         
        9.3     Adaptation functions          
        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        
       10.3     Adaptation functions         
       10.4     Sublayer functions 
11     STM-N Multiplex Section Layer (N = 1, 4, 16, 64, 256)
       11.1     Connection functions         
       11.2     Termination functions        
       11.3     Adaptation functions         
       11.4     Sublayer functions 
12     VC-n Path (Sn) Layer (n = 4-X, 4, 3-X, 3)        
       12.1     Connection functions         
       12.2     Termination functions        
       12.3     Adaptation functions         
       12.4     Sublayer functions 
       12.5     Virtual concatenation functions      
13     VC-m Path (Sm) Layer (m = 2, 12, 11)  
       13.1     Connection functions         
       13.2     Termination functions        
       13.3     Adaptation functions         
       13.4     Sublayer functions 
       13.5     Virtual Concatenation Functions    
14     Timing functions  
15     Specification of jitter and wander
       15.1     STM-N interfaces
       15.2     PDH interfaces     
       15.3     Jitter and wander measurement     
16     Overhead access function (OHA)           
Annex A – Algorithm for pointer detection    
        A.1     Pointer interpretation         
        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 
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       
Appendix VII – STM-64 regenerator jitter accumulation analyses and  hypothetical reference model (HRM)    
      VII.1     Introduction          
      VII.2     STM-64 regenerator hypothetical reference model
      VII.3     STM-64 (Type A) regenerator jitter accumulation simulation model, analyses, and results