With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeEphoneDnPriNum
Cisco Call Manager Express Ephone Dn Primary Number
1.3.6.1.4.1.9.9.439.1.1.47.1.4
Indicates the primary E.164 phone extension number that is associated with a line (ephone-dn) on this device. No primary number is associated as a default.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeEphoneDnPriNum on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.