With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipCallActiveSigSrcIpAddr
Cisco Sip Call Active Sig Src Ip Addr
1.3.6.1.4.1.9.9.995.1.1.3.1.8
This object reflects the signaling source IP address. Its value should be interpreted within the context of the associated cSipCallActiveSigSrcIpAddrType object.
Back to CISCO-SIP-CALLS-MIB MIB page.
IPHost Network monitor allows you to monitor cSipCallActiveSigSrcIpAddr 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.