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Call Scenarios and Applications
Issue 7 March 1998
A-31
External Call to Lookahead Interflow VDN
This scenario shows the call flow for an incoming ISDN PRI call to VDN 5008 that
looks ahead to VDN 1111 on ECS B (see Figure A-4). The first lookahead interflow
attempt is denied by ECS B. The second lookahead interflow attempt is accepted
by ECS B and the call is delivered to and answered by extension 1567 in ACD
split 1444.
Note that ECS A is not guaranteed to receive an ISDN Alerting message from
ECS B. In these cases, the ASAI adjunct connected to ECS A does not receive
the Alerting Event Report. The lookahead display information is the VDN name
provided on the VDN administration form and is subject to the VDN display
override rules.
Assume that VDN 5008 is monitored over CRV 80 by an ASAI Adjunct Processor
connected to ECS A, and that VDNs 1111 and 1222 are monitored over CRVs 20
and 26, respectively, by an ASAI Adjunct Processor connected to ECS B.
Messages in italics refer to messages exchanged by ECS B and the ASAI Adjunct
Processor connected to ECS B.