I need to configure CUBE with SIP as primary & BRI as backup. Both connections goes to same ITSP. How do I fail-over to BRI, when the SIP failure & recover back to SIP when the SIP comes up? CUBE also has SRST.
In the CUCM, I will create a RG with Top Down Configuration, and inside with two SIP Trunks, one to the CUBE on Top and another to GW BRI on the bottom.
In the CUBE I will put sip-options to sense when the ISTP goes down.
In my opinion, CUCM changes are not necessary. As Mohit stated below, you want to have your dial-peers setup with preferences, and you can test that the failover works by shutting down the primary VOIP (SIP) dial-peer. Here's an example of what you would need:
dial-peer voice 1 voip
session protocol sipv2
session target xxxxxxxxxxxxxx
voice-class codec X
dial-peer voice 2 pots
I hope that helps.