With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
callHistoryRetainTimer
call History Retain Timer
1.3.6.1.2.1.10.21.1.4.2
The minimum amount of time that an callHistoryEntry will be maintained before being deleted. A value of 0 will prevent any history from being retained in the callHistoryTable, but will neither prevent callCompletion traps being generated nor affect other tables.
Back to DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor callHistoryRetainTimer on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.
