[asterisk-users] Concept Clarifications

[Joseph L. Casale]

Hi,
My system is setup and working, I can dial out, in and to demo extensions that play music etc.
I would like to read up on some final topics before I get it running in production but don't really
know what to look for.

If an incoming call from a SIP DID is to ring across {n} phones for example, what is this procedure called?
How dose one write this up elegantly so if a new phone is purchased, it can be added to a "group" and
be included in all pre-existing config?

Thanks!
jlc