�1���� Scope
�2����
Normative references
�3����
Line signal structure
�4����
Requirements to received signals frequency tolerance
�5����
Transmitted power levels
�6����
Modulation method and signal space diagram
�7����
Data signalling and modulation rates
�8����
Received signal conditions
�9����
Interchange circuits
10���� Synchronization
11���� Special measures for raising
modem immunity
12���� Testing Facilities