With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvVoIPCallHistoryFallbackIcpif
Cisco Voice Vo IP Call History Fallback Icpif
1.3.6.1.4.1.9.9.63.1.4.2.1.31
The Calculated Planning Impairment Factor (Icpif) of the call that is associated to this call leg. The value in this object is computed by the following equation. Icpif of the fallback probe = Itotal (total impairment value) - configured fallback (Expectation Factor). A value of 0 implies that Icpif was not calculated and is meaningless for this attempt.
Back to CISCO-VOICE-DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cvVoIPCallHistoryFallbackIcpif 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.