Extensions.conf (Call Flow)
Calls come in on channels and are then handed to the “extensions.conf” file, which is the dialplan
Dialplan contains logical sections of matches called ‘Contexts,’ and each channel sends a call into the dialplan with a context name and a dialed number
The dialplan then matches (with modified regexp’s) the number being dialed, and runs applications accordingly
Each match on the dialed number has an order of steps called ‘Priorities’, and are indicated with an integral incrementing number (BASIC-like)