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Appendix A - Call Control Scenarios
This appendix contains the following ISDN call control scenarios in the order
listed:
• BRI Channel Initialization and Start Up (User Side)
• BRI Channel Initialization and Start Up (Network Side)
• PRI Channel Initialization and Start Up
• Normal Call Establishment and Termination
• Network initiated call
• Network terminated call
• Application initiated call
• Aborting cc_MakeCall( )
• Application terminated call
• Call Rejection
• Outgoing call rejected by the network
• Incoming call rejected by the application
• Glare (call collision)
• Simultaneous disconnect (any state)
• Initiation of Hold and Retrieve (BRI, PRI DPNSS and PRI Q.SIG protocols
only)
• Local initiated
• Remote initiated
• Network Facility Request or Service
• Vari-A-Bill (AT&T service only)
• ANI-on-demand, incoming call (AT&T service only)
• Advice of charge, inbound and outbound call (AT&T service only)
• Two B Channel Transfer (TBCT)
• Non-call Associated Signaling (NCAS)
NOTE:
Dialogic BRI/SC boards can be used as either Network side or User side
(Terminal side). Except where noted, the call control scenarios in this
appendix provide programming descriptions for the User side only.