Redundancy is a GREAT reason, so is scalability.
And, keeping MAJOR applications isolated from one another isn't bad either. If my voicemail crashes, it shouldn't have to bring down my call center (on Norstar and BCM it would).
I'm picking on Nortel a bit here, because it's what I know the best, but
A LOT of traditional systems are the same way. That being said, on the large system side, traditional manufacturers are already separating those MAJOR applications. From Nortel you might have an Option 11/61/81 or CS1000 (multiple servers?) for the PBX itself, CallPilot (multiple servers?) for voicemail, Symposium for the call center, MCS5100 for presence and collaboration...etc. And, yes, maintenance would be needed on each of the MAJOR components. I won't speak to equipment that I don't touch, but I KNOW other manufacturers have similar models.
Sorry ibex, we have digressed.
Originally posted by clanier:
They have Call Manager and Call Manager Express
