With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipCallActiveSubstate
Cisco Sip Call Active Substate
1.3.6.1.4.1.9.9.995.1.1.3.1.4
This object reflects the current substate of the call.
Back to CISCO-SIP-CALLS-MIB MIB page.
IPHost Network monitor allows you to monitor cSipCallActiveSubstate 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.