Dialplan location

The dialplan is primarily defined in the extensions.conf file. This can also include additional files that are added into it using the #include directive. For instance, systems using the FreePBX GUI will have extensions_additional.conf, extensions_custom.conf, and extensions_override_freepbx.conf as standard files, which have been added using #include into the extensions.conf file. We must also remain aware of files such as the features.conf file, as they also include numbers that can be dialed such as codes for Pickup and Call Parking, and so form part of the dialplan.

A list of standard and optional Asterisk configuration files can be found at http://www.voip-info.org/wiki/view/Asterisk+config+files.