With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccapAppInstHisPSTNOutCallTotConn
Cisco Call Applications Application Instance History PSTN Out Call Total Connection
1.3.6.1.4.1.9.9.146.1.3.3.1.14
Total number of PSTN placed call legs connected to this application instance.
Back to CISCO-CALL-APPLICATION-MIB MIB page.
IPHost Network monitor allows you to monitor ccapAppInstHisPSTNOutCallTotConn on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.