after you have configured
CFN and CDB you could try the following
Digital Telephones
CLS Class Of Service options
(ABDD) Abandoned call record and Time to Answer Denied (Internal calls)
ABDA Abandoned call record and Time to Answer Allowed (Internal calls)
(CDMD) shows whenever a trunk is accessed by, or terminates on, the users phone
CDMA shows whenever a trunk is accessed by, or terminates on, the users phone (ICDD) Internal Call Detail Recording Denied
ICDA Internal Call Detail Recording Allowed