I am in the process of deploying CUCM 7.1 and Unity Connection 7.1 for a customer with several sites. One of the sites has an Avaya IP telephony system which will be replaced in 2012.
The Avaya system connects to the CUCM cluster using H.323. Calls between both systems work fine.
My issue is that the customer has some users on the Avaya system that need voicemail but he does not want to buy any more Avaya voicemail licenses. He wants to find a way to use the Unity Connection system to provide voicemail for these users.
If I set the CFB and CFNA destinations on an Avaya phone to the pilot number (3000) on CUCM for Unity Connection the call is forwarded via the H.323 link but when it hits Unity Connection it appears as a direct call and plays the user login greeting rather than normal voicemail greeting for the user.
Is there any simple way to resolve this? - I cannot integrate Unity Connection directly with the Avaya system as (according to the customer) it does not support SIP.