With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmCTIDeviceRegFailReason
Cisco Call Manager CTI Device Registration Fail Reason
1.3.6.1.4.1.9.9.156.1.8.1.1.17
The reason code associated with registration failed CTI Device.
Back to CISCO-CCM-MIB MIB page.
IPHost Network monitor allows you to monitor ccmCTIDeviceRegFailReason 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.