With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmCTIDeviceTable
Cisco Call Manager CTI Device Table
1.3.6.1.4.1.9.9.156.1.8.1
The table containing a list of all CTI (Computer Telephony Integration) Devices which have tried to register with the local CUCM at least once. When the local CUCM is restarted, this table will be refreshed.
Back to CISCO-CCM-MIB MIB page.
IPHost Network monitor allows you to monitor ccmCTIDeviceTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.