audio drops midway through call or loud beeping sound
I've got two issues I could use some help on regarding voice quality and audio dropping altogether on external calls.
Running CUCM 8.0 and calling out through two 2921 routers version 15.0(1r)M9. 3 Verizon PRIs split between interfaces on the routers.
1. User calls to PSTN, call is connected, after 5 or 10 minutes, the other party can suddenly no longer hear our user. Hanging up and calling back resolves it.
2. PSTN calls our User, they chat...suddenly there is a long beeping sound and the parties must hang up and reconnect the call.
I'm at a loss for what to do next. I've got some clocking errors on one of the 3 interfaces being used, but I've gotten reports of these issues occuring on all 3 t1 cards on either 2921 router at some point, so it doesn't seem to be isolated to a bad card or hardware.
Any help is appreciated, anyone ever experienced these issues?
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