[Asterisk-Users] Incoming 800 Number

[Christopher Barmonde]

We're going to be switching our 800 service soon and I just want to make 
sure I have the right idea about what we'll be doing.  Currently it runs 
through an Adtran and the lines are just divided into groups in 
zapata.conf, but our new service will be pure VoIP.  I'm almost positive 
it will be SIP, though I won't know the exact details until later this week.

With that in mind, here are the things I imagine I have to do:

1) Register host in sip.conf
2) Create a client in sip.conf that directs traffic from that number to 
the correct context in extensions.conf
3) Possibly modify the current context in extensions.conf to work with 
the new setup

Am I thinking straight here?  Would it be possible for someone to give 
just a really brief setup of how this would work so I can be sure I'm on 
the right track?  Any help is appreciated.  Thanks.