Our Telecoms guys are looking into PBX's and also high availability. So far, I can see two options:
1. Active/ Passive
2. Active/ Active
I'm not a clustering wiz....but one requirement we have is - in the event one of the PBX's go down - that calls don't drop on the failover. I assume we need active/active PBX clustering for that? How does that actually work, does anyone know?