Calls drop after 2 rings when the Subscriber is down

[jasonnash1]

We had an issues where our CUCM Subscriber server went down due to a power failure. All the phones registered successfully to our CUCM Publisher at another location and people were able to make outbound calls. But the people at the same location as the Publisher server could not receive calls. The calls would drop after 2 rings. Oddly users on VPN did not have this issue.

Waiting on Cisco TAC, but wanted to ask here to see what theories you may have on the cause of this issue?

[mbowden7]

Greetings,

Do you have dial-peer configurations pointing to both PUB and SUB for redundancy? Do a preferred dial peer! It sounds like the PUB knows the route out but the VG doesn't know about the PUB? But would need to look at Log both on PUB and VG to trace each leg of the call. What is your topology?

Also what is the audio codec preference. Could be a bandwidth issue.

[TONY SMITH]

"But the people at the same location as the Publisher server could not receive calls. The calls would drop after 2 rings"

Are you referring to inbound PSTN calls?  If so then what sort of gateway is involved, and how is it configured?   When you say  "calls would drop after 2 rings"do you mean the actual called phone rings, or that the caller hears ringback?    I'm suspecting a gateway timeout issue, but we'd need to know more about the configuration.