With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeEphoneIpAddress
Cisco Call Manager Express Ephone Ip Address
1.3.6.1.4.1.9.9.439.1.1.43.1.3
Indicates the designated IP address to this Cisco IP phone (Ephone) configured on this device.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeEphoneIpAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.