With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeIPAddress
Cisco Call Manager Express IP Address
1.3.6.1.4.1.9.9.439.1.1.4
Indicates the IP address through which the IP phones communicate with CCME. The type of this address is determined by the value of the ccmeSysIPAddressType object. This IP address is usually the IP address bound to the Ethernet port on the gateway to which the phones are connected.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeIPAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.