If charge information is sent to an ISDN connection, the resulting connection charges can be limited quite easily. For example, in its default state, a maximum of 830 charge units may be used in six days. The router will not permit the establishment of any further connections once this limit has been reached.
Note: The best way to use the router's call charge monitoring function is if you have "call charge information enabled
during the connection" to the ISDN network (i.e. AOCD). If necessary, subscribe to this facility from your
telecommunications carrier. Charge monitoring with the "Charge information after connection" feature is also
possible in principle, but in this case continuous connections may not be detected!