With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccapAppTypeHisPSTNInCallDiscNormal
Cisco Call Applications Application Type History PSTN In Call Disconnected Normal
1.3.6.1.4.1.9.9.146.1.2.2.1.9
Total number of incoming PSTN call legs that disconnected with 'normal' cause code in this application type.
Back to CISCO-CALL-APPLICATION-MIB MIB page.
IPHost Network monitor allows you to monitor ccapAppTypeHisPSTNInCallDiscNormal 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.