With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmMsgSourceInterface
Cisco Call Home Message Source Interface
1.3.6.1.4.1.9.9.300.1.7.3
The interface to be used while generating Call Home messages. A value of zero indicates that a source interface is not specified. Changing the value of this object may change the value of ccmMsgSourceIpAddrType and ccmMsgSourceIpAddr.
Back to CISCO-CALLHOME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmMsgSourceInterface on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.