1 System capacity
2
Start-stop channel inputs
3
Start-stop channel outputs
4
Multiplexing details
4.4 Alternative A
4.5 Alternative B
5
Frame structure
5.5 Alternative A
5.6 Alternative B
6
Synchronizing
6.3 Alternative A
6.4 Alternative B
7
Telex signalling
8
Aggregate signals and interface
9
System clock arrangements
10 System maintenance, control and
alarms
11 Link performance and availability
indicators
References