Inbound calls from PSTN randomly complete. Isdn q931, ccapi, h225, and h245 debugs indicates the calls gets to the H323 gateway and sends the call setup to the call manager; however, sometimes the gateway does not hear back from the call manager, and the call drops. The error 'Cause i = 0x82E6 - Recovery on timer expiry' is produce in the isdn q931 debugs when this happens. Call manager and gateway configuratration has been triple checked and all looks good. Using call manager version 7.1.2
Any known resolution on this issue?