This issue occurs because the Call Detail Record (CDR) collection is disabled by default.
To start the CDR collection, enable it in the service parameters.
The CDR collection is enabled through a Cisco CallManager service parameter named CdrEnabled.
To enable the CDR collection, perform these steps:
Note: You do not need to restart the Cisco CallManager for the change to take effect.
For more information on CDR and CDR collection, refer to the Call Detail Records section of Administrative Tools Overview.