With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
Cisco Call History Logical If Index
This is the ifIndex value of the logical interface through which this call was made. For ISDN media, this would be the ifIndex of the B channel which was used for this call. If the ifIndex value is unknown, the value of this object will be zero. For an IP call, the value will be zero.
Back to CISCO-DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cCallHistoryLogicalIfIndex on Cisco device via the SNMP protocol.
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Easy monitoring of cCallHistoryLogicalIfIndex with IPHost tools