Description
This feature lets users assign an account code, project or client number to a specific call. The billing codes are output in CDR records, if enabled.

Implementation
To activate this feature, while on an active call, press the Billing key, enter the billing code and press the Billing key again to send the information to CDR records. Analog business phones can use this feature by pressing *02 while on a call and entering the billing code, then #.