With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipStatsConnUDPInactiveTimeouts
Cisco Sip Stats Connection UDP Inactive Timeouts
1.3.6.1.4.1.9.9.152.1.2.10.6
This object reflects the total number of UDP connections that timed out due to inactivity since system startup.
Back to CISCO-SIP-UA-MIB MIB page.
IPHost Network monitor allows you to monitor cSipStatsConnUDPInactiveTimeouts 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.