With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csbCurrPeriodicStatsCallMediaFailure
Cisco Session Border Curr Periodic Stats Call Media Failure
1.3.6.1.4.1.9.9.657.1.3.1.9
This object indicates the number of call setup failures due to media failure during this interval.
Back to CISCO-SESS-BORDER-CTRLR-CALL-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor csbCurrPeriodicStatsCallMediaFailure 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.