SIP and Verto Profiles, Dialplan Contexts, ITSPs

In previous section we edited the "public" context of dialplan for servicing incoming calls from DID numbers. And, in the section before it, we added an ITSP gateway to the "external" SIP profile definition, and added an extension to the "default" dialplan context, so we can use the gateway to call outside world.

Actually, in example demo configuration we have two SIP profiles, named "internal" and "external" (those are just names, you can change them). And we have two major dialplan contexts, named "default" and "public" (there is also another, "features", but is not relevant here).

Seems a little confusing at first, but it makes perfect sense. Read on.