Is it possible to use a single Unity 4.2 for (1) CCM 4.2 and (1) CUCM 7.1 cluster at the same time? For example, splitting the ports to both clusters. We have a large (>30K) VoIP deployment and need to upgrade the Callmanager cluster and Unity, so this is for migration purpose.
Yes, you can do this. You will need to upgrade the TSP to ensure compatibility with CUCM 7.x and manage two integrations (within UTIM) but it can be done. Go here:
Yes, you can do this. You will need to upgrade the TSP to ensure compatibility with CUCM 7.x and manage two integrations (within UTIM) but it can be done. Go here:
I had a near identical requirements a while ago for a customer migration. I opted to leverage Q.SIG between the two Call Manager clusters for handling the VM integration. I assigned all ports to one cluster and just tunnelled MWI through Q.SIG (via ICT). There are things to be dealt with for sure (like overlapping dial plans) but I found it relatively painless.
I did a quick write up on the experience. Maybe you will find it useful.
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