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How the integration works
The following is an overview of the path an external call takes through the Cisco
AVVID network. The call travels from the Cisco gateway or router and CallManager
software, through UM8500, and on to a subscriber’s extension.
When an external call arrives, the Cisco gateway sends the call over the
LAN to the machine where the Cisco CallManager is installed.
For CallManager lines that are configured to route calls to UM8500,
CallManager tells the gateway to send the call to an available UM8500
extension.
UM8500 answers the call and plays the opening greeting.
During the opening greeting, the caller enters a subscriber’s name or
extension number, for example 1234.
UM8500 notifies CallManager that it has a call for extension 1234.
From this point, the path of the call depends on whether UM8500 is set
up to perform supervised transfers or release transfers.
Supervised Transfers
While UM8500 holds the call, the
CallManager attempts to
establish a connection with
extension 1234:
●
If the line is available,
CallManager connects the
call from UM8500 to
extension 1234. CallManager
and UM8500 drop out of the
loop and the call is
connected directly from the
Cisco gateway to extension
1234.
●
If the line is busy or
unanswered, CallManager
gives that information to
UM8500 and UM8500
performs the specified
operation, for example, it
takes a message.
Release Transfers
UM8500 passes the call to
CallManager and CallManager
sends the call to extension 1234
without waiting to determine if
the line is available. CallManager
and UM8500 drop out of the call
loop.
If UM8500 is set up to perform
release transfer, and if UM8500
takes messages when a line is
busy or unanswered, configure
each phone to forward calls back
to UM8500 when the line is busy
or unanswered.
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