I am considering deploying OCS without Enterprise Voice as I have a VOIP/PBX. From what I can tell this should mean I don't need a mediation server. Is this correct or am I missing something.
If I do still need a Mediation Server can anyone share any sizing information (CPU, Memory etc, Concurrency etc). Also I know that the Mediation can't be installed on another server hosting other OCS roles but has anyone seen it implemented on the same physical box running the Exchange Unified Messaging role.
Thanks.