Imagine customer accepted to buy Cisco IP phones and we have the following solution:
30 Cisco IP Phones----SwitchCisco(L2)----------CiscoRouter2821--WAN-----IP Centrex (Call Manager hosted here in Service Provider)
If WAN link goes down, customer wants to have ability to let internal staff communicate on Cisco IP Phones. I hope that no intervention (static phone configuration on router reconfiguration) is required in that event.
So if I run CME on Cisco Router2821 I could accomplish that, right?
If you can give me a hint on directions I need to take to configure that, or point me to documentation, that would be great. Let me know if that is something practical or perhaps cumbersome.