With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipCfgTimerConnectionAging
Cisco Sip Configure Timer Connection Aging
1.3.6.1.4.1.9.9.152.1.1.2.13
This object specifies the amount of time to wait before aging out a TCP/UDP connection.
Back to CISCO-SIP-UA-MIB MIB page.
IPHost Network monitor allows you to monitor cSipCfgTimerConnectionAging on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.