1 General
2
Exchange functions – Introduction and framework
2.1 General
2.2 Exchange model
2.3 Utilization of exchange functions for services
3
General functions required in an exchange for operation in the IDN, ISDN
or mixed analogue/digital environment
3.l Timing and synchronization
3.2 Signalling
3.3 Data Packet Handling
3.4 Information retrieval and analysis
3.5 Resource management
3.6 Ongoing
operations
4
Functions used in processing bearer service call attempts
4.1 Process Service Request
4.2 Connect (through connect)/Disconnect
4.3 Perform originating screening (in originating exchange)
4.4 Perform terminating screening (in terminating exchange)
4.5 Process Attempt
5
Additional functions required to provide ISDN Supplementary Services