With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmMediaDeviceStatusReason
Cisco Call Manager Media Device Status Reason
1.3.6.1.4.1.9.9.156.1.6.1.1.9
The reason code associated with the media device status change.
Back to CISCO-CCM-MIB MIB page.
IPHost Network monitor allows you to monitor ccmMediaDeviceStatusReason on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.