[Asterisk-Users] Re: Basic Setup Question

[Noah Miller]

> I have two Asterisk boxes installed but am not sure how to setup the
> configuration for what I want to do.
>
> One box has two FXO cards in it that will connect two PSTN lines.  I 
> want to
> have Asterisk transfer the incoming calls to the other box which has 
> an FXS
> card in it.  That box should ring that call through to a handset 
> attached to
> the FXS card.

Probably the most common way to do this is with IAX forwards.  Here is 
an example:

Location 1 IP address: 123.123.123.123
Location 2 IP address: 234.234.234.234

In iax.conf on my "1" box, I use:
[ast2-in]
type=user
secret=pass2
context=my_context_on_2
disallow=all
allow=ulaw

[ast2-out]
type=peer
secret=pass2
username=ast2
host=234.234.234.234
disallow=all
allow=ulaw


In iax.conf on my "2" box, I use:
[ast1-in]
type=user
secret=pass1
context=my_context_on_1
disallow=all
allow=ulaw

[ast1-out]
type=peer
secret=pass1
username=ast1
host=123.123.123.123
disallow=all
allow=ulaw


Then in extensions.conf, if I wanted to use 1XX extensions for Location 
1 and 2XX extensions for Location 2, I could use something like this:

extensions.conf for Location 1:
exten => _2XX,1,Dial(IAX2/ast2-in:pass2 at 234.234.234.234/${EXTEN})

extensions.conf for Location 2:
exten => _1XX,1,Dial(IAX2/ast1-in:pass1 at 123.123.123.123/${EXTEN})


Be sure to restart asterisk on both machines after you do this (not 
just a reload).

BTW:  If you are able to put the FXS card in the same machine as the 
one with the FXO's you can avoid a lot of potential problems, and the 
setup is a lot simpler.


- Noah