1 Scope
2 References
3
Definitions
4
sSTM interface rates
5
Transport formats
5.1 Section overhead
5.2 Scrambling
5.3 Frame structure for the sSTM-2n interface
5.4 n ´ TUG-2
payloads
6
Overhead functions
6.1 Interface layers
6.1.1 Physical layer
6.1.2 Section layer
6.1.3 Path layer
6.2 sSTM section overhead
6.2.1 Regenerator section overhead
6.2.2 Multiplex section overhead
6.3 sSTM maintenance signals
6.3.1 VC-n Path layer maintenance signals
6.3.2 sSTM multiplex section remote defect indication (MS-RDI)
6.3.3 sSTM multiplex section alarm indication
signal (MS-AIS)
7
sSTM-2n interface APS
8
Multiplexing and numbering structure
8.1 Multiplexing structure
8.2 Numbering structure
Annex A – Structures for radio‑relay applications
A.1 Scope
A.2 Interface rates
A.3 k ´ TU-12 payloads
A.4 Media-dependent overhead functions
A.5 Multiplexing and
numbering structure
A.5.1 Multiplexing structure
A.5.2 Numbering structure
Annex B – Frame format of a reduced functionality sSTM-11 for intra-station
crossconnects of TU-12 using existing office wiring
Annex C – Numbering structure of TUs into sSTM frame formats
C.1 Numbering of TU-2s in a sSTM-2n
C.2 Numbering of TU-12s in a sSTM-2n
C.3 Numbering of TU-11s in a sSTM-2n
C.4 Numbering of TU-12s in a sSTM-1k