Integration features. Mitel 8500

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.

28 UNIVERGE UM8500 I NTEGRATION G UIDE