I think it is typical to have some limited number of outbound channels to your
SIP provider. You send all calls, up to your limit, to the same place. The phone
numbers your provider gave you are used to route inbound calls to your asterisk
box. You will typically have some limited number of inbound channels. All people
could call the same number, again controlled by the number of channels your
provider allows. A reason to have multiple inbound (DID) numbers is so you can
route each number to a specific dialplan extension. You might route one number
to the CEO of the company and the other to a voice tree that allows the caller
to specify the person's extension they want to talk with.
--
Jim Dickenson
mailto:dickenson at cfmc.com
CfMC
http://www.cfmc.com/
On May 7, 2010, at 11:17 AM, Eddie Mikell wrote:
> All:
>
> Still experimenting with the asterisk server for the company.
>
> My local phone company has given me two sip numbers to experiment with,
> say 444-456-1234 & 444-456-5678
>
> Calling in and out works, and I've spread a couple of the phones out
> with some co-workers.
>
> My question is this: Do I have to define multiple sip lines in either
> the sip.conf or the extensions.conf?
>
> Now when I dial out, I just use
>
> exten => _9.,1,DIAL(SIP/${EXTEN:1}@xx.tracfone.net).
>
> How does it know which sip channel to use?
>
> Hope that is clear.
>
> Thanks for all the help.
>
> Eddie Mikell
>
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