CCAPI: Internal Error (Software Error)

CCAPI: Internal Error (Software Error)
4

We changed a customer from PRI to SIP trunk and after the change, the Exchange UM stopped working for calls coming in from the outside.  We found the following error in the logs:

%VOICE_IEC-3-GW: CCAPI: Internal Error (Software Error): IEC=1.1.180.1.13.112 on callID 78

Some posts mentioned upgrading the firmware (which we did with no effect).  The dial-peer pointed to Exchange had some volume adjustments on it.  Once we removed the adjustments, the error went away and calls went through.

audio incoming level-adjustment -5audio outgoing level-adjustment -15

Other things to check would be codec changes or TCP/UDP changes as either would cause transcoding.

Update:

I ran into a similar error again.  This time deleting the dial-peer and re-adding it, along with restarting the SIP services, fixed the problem.