On a single Call Manager cluster (6.1.3b) I am looking for a method for alternate routing between sites in the event of a WAN failure. A translation pattern keeps the calls on net. For example:
User at site A dials 914103456029
Translation pattern for the DID range this falls under drops the 9
we use a 11 digit DN so now the call stays on cluster (across the wan to site B) and all is well.
But if the wan is down what do we do with the call? I do not see a way to alternate route a translation pattern to a route group that would send the call out the PSTN.
Our large sites have a subscriber, if the WAn is down, the phones would still be registered CFUR is not an option.
I am not sure AAR would work, my understanding is it provides CAC using Locations to determine the available bandwidth.