�1����
General
�2����
Scope
�3����
Abbreviations
�4����
Interworking configuration and network characteristics
������� 4.1���� Interworking configurations
������� 4.2���� Key ISDN and PSTN characteristics and related interworking
functions
�5���
�ISDN bearer services suitable
for ISDN-PSTN interworking
������� 5.1���� ISDN bearer services suitable for ISDN to PSTN interworking
(circuit)
������� 5.2���� ISDN bearer services suitable for PSTN to ISDN interworking
(circuit)
������� 5.3���� ISDN bearer services suitable for ISDN to PSTN interworking
(packet)
������� 5.4���� ISDN bearer services suitable for PSTN to ISDN interworking
(packet)
�6����
Connection type suitable for ISDN-PSTN interworking
�7����
Functional requirements for ISDN-PSTN interworking
������� 7.1���� Interworking between signalling systems
������� 7.2���� Provision of interworking indications
������� 7.3���� Generation of in-band tones and announcements
������� 7.4���� Handling of non-voice calls between ISDN and PSTN subscribers
�������
7.5���� Control of speech
processing and echo control devices
������� 7.6���� A/m law encoding
�8����
Handling of packet mode calls between ISDN and PSTN subscribers