With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccapAppInstHisIPOutCallDiscSysErr
Cisco Call Applications Application Instance History IP Out Call Disconnected Sys Error
1.3.6.1.4.1.9.9.146.1.3.3.1.39
Total number of outgoing IP call legs that disconnected with 'system error' cause code. System error cause code could be any thing other than 'normal or user error'.
Back to CISCO-CALL-APPLICATION-MIB MIB page.
IPHost Network monitor allows you to monitor ccapAppInstHisIPOutCallDiscSysErr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.