Has anyone else encountered a problem in which the 7937 conference phones unregister? On the phone itself, it will drop a call and then sit there with a Configuring CM List message. In the CCM server's event log, I see errors showing Device Transient Connection and sometimes Device Unregistered errors. The phones usually come back up within 5 minutes, but it is a big disruption to meetings being held in conference rooms. This doesn't seem to affect any of the 7961 desk phones that are plugged into the same Catalyst 3750 switches. The CCM is version 4.1(3)sr6a.
Here is an example of one of the errors:
Event Type: Error
Event Source: Cisco CallManager
Event Category: None
Event ID: 3
Time: 2:40:31 PM
Error: DeviceTransientConnection - Transient connection attempt.
Connecting Port: 2000
Device name [Optional].: SEP0004F2E115B2
Device IP address.: 10.1.30.128
Device type. [Optional]: 431
Reason Code [Optional].: 1
App ID: Cisco CallManager
Cluster ID: StandAloneCluster
Node ID: 10.1.110.10
Explanation: A connection was established and immediately dropped before completing registration. Incomplete registration may indicate a device is rehoming in the middle of registration. The alarm could also indicate a device misconfiguration, database error, or an illegal/unknown device trying to attempt a connection.
Recommended Action: No action is required if this event was issued as a result of a normal device rehome..
Thanks in advance,