With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmCTIDeviceDirNumTable
Cisco Call Manager CTI Device Directory Number Table
1.3.6.1.4.1.9.9.156.1.8.2
The table containing a list of directory numbers that are assigned to all of the registered and unregistered CTI Devices in the ccmCTIDeviceTable.
Back to CISCO-CCM-MIB MIB page.
IPHost Network monitor allows you to monitor ccmCTIDeviceDirNumTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.