Basic Configuration settings for handling outgoing calls and PBX specific functions.
Specify the digit which is necessary to get an outside line for external calls, e.g. 0 or 9. This prefix is added automatically for external calls. Also see dialing Rules for extended configuration.
For distinguishing between internal and external calls type in the maximum length of the internal phone number + 1 (Example: The internal phone numbers are 0 to 99; an external number would be defined by using 3 digits).
By default, the dialing rules are not used and the option should only be activated if caller identification is not working without using dialing rules.
By default, the dialing rules are not used and the option should only be activated if the dialing rules for outgoing calls are required.
See also
Dialing Rules
Dialing Rules for US / Canada