
Cisco Unity CallManager Telephone Service Provider 643
information. Whenever the MIU asks for the call information (via a TAPI function), it
simply returns what it received from that Skinny message.
There is logic inside the TSP that decides which pieces of the StationCallInfoMessage will
be used, and it is not that complicated. In CCM 3.1 and up, a new field was added to
StationCallInfoMessage, and it was intended as a voice-mail box value. For example, there
is an IP phone with a DN of 1234, but the user at this phone has a Unity subscriber account
with a DTMF ID of 5678 (one can expect to see an instance where a user has two different
phone ...