PSTN cannot hear ringback and MGCP

[rnarayana]

Hello,

I have T1 CAS MGCP gateway.Callmanager version 3.3.3.

IOS version is 12.215zj3. When a call comes from pstn ,pstn users cannot hear ringback.

Is there any parameter that needs to be changed in callmanager or in router.This works fine for T1 PRI.

Thanks in advance.

[adignan]

Definately a bug in 12.2(15)zj3 for no ringback. I had 12.2(15)zj3 on 30 routers that had T1 CAS connections, no ringback on any of them. Upgrade to the latest 12.2(15)zjX version and you will be fine.

[rnarayana]

Thanks a lot .