�1���� System capacity
�2����
Start-stop channel inputs
�3����
Start-stop channel outputs
�4����
Multiplexing details
�5����
Frame structure
�6����
Synchronizing
�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