With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipStatsConnUDPSendFailures
Cisco Sip Stats Connection UDP Send Failures
1.3.6.1.4.1.9.9.152.1.2.10.2
This object reflects the total number of UDP send failures since system startup.
Back to CISCO-SIP-UA-MIB MIB page.
IPHost Network monitor allows you to monitor cSipStatsConnUDPSendFailures 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.