With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccapAppGblHisPSTNInCallDiscNormal
Cisco Call Applications Application Global History PSTN In Call Disconnected Normal
1.3.6.1.4.1.9.9.146.1.5.9
Total number of incoming PSTN call legs that disconnected with 'normal' cause code in this gateway.
Back to CISCO-CALL-APPLICATION-MIB MIB page.
IPHost Network monitor allows you to monitor ccapAppGblHisPSTNInCallDiscNormal on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.