With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
callHistoryPeerAddress
call History Peer Address
1.3.6.1.2.1.10.21.1.4.3.1.1
The number this call was connected to. If the number is not available, then it will have a length of zero.
Back to DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor callHistoryPeerAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.