On 3 PRIs (MGCP gateway) I have every inbound PSTN call directed to a SIP trunk pointing to a 3rd-party IVR server. That works great.
What I want to do is set up a failover scheme by which - in the event the IVR server fails - the same inbound PSTN calls get sent to a Hunt Group, ringing many agent phones (registered to the same CUCM) simultaneously, bypassing the IVR. Basically, I want to add a Hunt Group to a Route List - which is not possible.
I could easily put route patterns into a second partition and list it beneath the SIP target partition . . . But the inbound calls would still match the first route pattern pointing to the SIP trunk, and calls would fail in the event the server were down. They would never hit the route pattern pointing to the Hunt Pilot in the subsequent partition.
Ideas would be greatly appreciated.