1
Scope
2
References
3
Abbreviations
4
The definition and measurement of the block for SDH multiplex sections
4.1 Definition of the block for an SDH multiplex section
4.2 Block sizes
4.2.1 In-service monitoring of blocks
4.3 Out-of-service measurements of blocks
5
Error performance events for SDH multiplex sections
5.1 Definitions
5.2 Events determination for multiplex sections
5.2.1 Anomalies
5.2.2 Defects
5.2.3 Estimation of the performance events
6
The definition and measurement of the block for SDH regenerator sections
6.1 Definition of the block for an SDH regenerator section
6.2 Block sizes
6.3 In-service monitoring of blocks
6.4 Out-of-service measurements of blocks
7
Error performance events for SDH regenerator sections
7.1 Definitions
7.2 Events determination for regenerator sections
7.2.1 Anomalies
7.2.2 Defects
7.2.3 Estimation of the performance events
Annex A – Entry and
exit criteria for the unavailable state of
a single direction of an SDH section
A.1 Criteria for a single direction