Voice Messaging Stops After 30 Seconds
When Cisco Unity system is running with Unified Communications Manager, a caller gets only 30 seconds in which to leave a voice-mail message.
This problem occurs when a caller is leaving a voice message and the call terminates 30 seconds into the message. Reproduce this easily by dialing a valid extension/number and attempting to leave a voice message that is longer than 30 seconds.
To resolve this problem, verify that the Media Gateway Control Protocol (MGCP) is being used on the voice gateway.
If the MGCP is being used, add the no mgcp timer receive-rtcp command.
If MGCP is not on the voice gateway, enable Skinny traces for the Cisco Unity server and Cisco Communications Manager traces.
For information on setting Cisco Unity diagnostic traces, refer to the "Diagnostic Trace Utilities and Logs" section of the applicable Cisco Unity Troubleshooting Guide at