1 Scope
2 References
3 Definitions
4 Abbreviations
5 Conventions
6 Individual and group protection concept
7 Architecture types
7.1 1+1 protection architecture
7.2 1:n protection architecture
7.3 m:n protection architecture
7.4 (1:1)n protection architecture
8 Switching types
9 Operation types
10 Protocol types
11 Protection classes and subclasses
11.1 Trail protection
11.2 SNC protection
11.3 Subnetwork connection group (SNCG) protection
12 Survivability of inverse multiplexed link connections (SIM)
12.1 SIM functional model
13 Protection switching performance
14 Hold-off timer
15 Wait-to-restore timer
16 Automatic protection switching (APS) signal
17 Non-pre-emptible unprotected traffic (NUT)
18 Extra traffic (protection) transport entity overhead/OAM
19 External commands
19.1 External commands for CL-SNC
19.2 External commands for ACL-SNC
20 Protection switching process states
21 Priority
22 SF and SD trigger conditions
22.1 Overview of SF conditions
22.2 Overview of SD conditions
23 Working and protection allocation
24 APS protocol
24.1 1-phase
24.2 2-phase
24.3 3-phase
Appendix I – Implementation of hold-off timer
Appendix II – Automatic conditions (SF, SD) in group SNC protection
Appendix III – Implementation observations
III.1 Analysis
Appendix IV – An example of (1:1)n protection
Appendix V – Examples of survivability of inverse multiplexed trails
V.1 Survivability offered by LCAS
Appendix VI – Solution for SD triggered protection in PTN