I was wondering it some could tell me how the extensions_custom.conf works ? when to use it and some basic instructions on how to use it if I want to add some additional dial plan rules to the [from-internal] sections of the dial plan, also I read that you can add the [from-internal-custom] context to the extensions_custom.conf and that there is some relationship between these two contexts ?
The extensions_custom.conf file was create by Asterisk what I am wanting to find out is when is it referred , eg does asterisk look at that file before the extensions.conf file or only when it is referred to in another file ? its more the process that I am interested in ?