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Look-Ahead Interflow
8-14 Issue 4 September 1995
4. If the oldest call waiting time is less than 60 seconds, step 4 accepts the
call and queues it. ADR then connects the call through to the receiving
PBX/ACD.
5. Steps 5-7 provide ringback, announcement, and music to the caller.
If the vector at location A rejects the call by sending a busy indication back to the
network over the ISDN-PRI link, ADR reroutes the call to location B, which must
accept the call. If location B is closed or too busy to take the call, location B can
use Call Vectoring and Look-Ahead Interflow to check other locations. If other
locations exist and can take the call, location b can forward the call. If other
locations do not exist or cannot take the call, location B can use Call Vectoring to
route the call to location A. If location A is not open, location B can use Call
Vectoring to provide an announcement or busy tone to the caller.