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
6.2 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