With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccapAppInstHisPSTNInCallInHandoffRet
Cisco Call Applications Application Instance History PSTN In Call In Handoff Returned
1.3.6.1.4.1.9.9.146.1.3.3.1.9
The Total number of incoming PSTN call legs returned back as part of 'completed handoff with call back operation'.
Back to CISCO-CALL-APPLICATION-MIB MIB page.
IPHost Network monitor allows you to monitor ccapAppInstHisPSTNInCallInHandoffRet on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.