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.
Re: Integrate Unity 4.2 to (2) Callmanager clusters
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.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...