With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeEphoneTag
Cisco Call Manager Express Ephone Tag
1.3.6.1.4.1.9.9.439.1.1.43.1.1
An number that uniquely identifies a IP phone configured on the device. The maximum number of Ephone entries varies among Cisco IOS platforms and may be less than 120.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeEphoneTag 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.