Description: Determines whether to perform a check and which check to perform when an incoming call matches this call details entry based on the contents of the calling number information in the incoming SETUP message. The value 'off' means that the check is not carried out. The value 'present' means that the check is carried out only if calling number information is present. The value 'required' means that the calling number must be present for the check to pass. When the check is carried out, the calling number information is compared with the numbers in the CLI list referenced by the object ccDetailsInSetupCliCheckList. A number of checks are optionally carried out once a matching call is found. The first check is against the called subaddress in the SETUP message, then against the user-user information in the SETUP message, then against the calling number information in the SETUP message.