When this function is active, incoming and outgoing calls are saved in the Call history. The logging of calls can be set depending on the type of call using the Alert Info. Calls that have already been handled elsewhere can be excluded from the call list.

A possible application for COMfortel D-series devices is in hotels: If the function is switched off, guests are prevented from seeing the phone numbers of calls made previously by other guests.

The Telephony Settings should be blocked, to prevent the function from being activated by unauthorised persons.