The call log of a device includes incoming calls when the device is not logged in. In addition, if a call cannot be delivered to an endpoint due to the Limit the Number of Concurrent Calls (LNCC) feature, the calls is also logged.
For H.323 endpoints, Communication Manager stores logged out missed calls and downloads the Call History logs when the endpoint logs in. The maximum number of H.323 Call History logs is 10.
For SIP endpoints, the primary Session Manager stores all call logs and downloads the logs to the endpoint during login. The endpoint maintains the logs locally while logged in.
From Release 8.1, call logs are stored redundantly on the primary and secondary Session Managers. The primary and secondary Session Managers store the call logs in the User Data Storage database.
You enable Call History logging on the Session Manager Communication Profile for the user by enabling Enable Centralized Call History. The default is off. The maximum number of call logs per Communication Profile is 100.
SIP phones: