Chapter 5. Tentacles of the PBX—The Calling Rules Tables
Philosophy: A route of many roads leading from nowhere to nothing. —Ambrose Bierce
While it appears that Ambrose Bierce has a little respect for Philosophy in general, he would surely refer to calling routing as—roads leading from a single point to multiple points, or something similar. The purpose of the "Calling Rules" is to define the methodology by which calls are routed from the PBX to the outbound world.
An interesting feature of a PBX is the ability to support multiple dial plans, meaning that you are able to create various dial-plan logics, associate different calling rules to each dial plan, and assign users to specific dial plan (as seen in Chapter 3). Schematically speaking, the ...