[asterisk-users] What does 'trunk' mean in outgoing and incoming?

Tim St. Pierre tim at communicatefreely.net
Fri Sep 1 19:49:12 MST 2006


Traditionally, a trunk was a group of channels interconnecting switches.  On a 
PBX, they are the incoming and outgoing lines to the rest of the world.  A 
trunk is any channel that can carry a call to selectable destinations, as 
opposed to a subscriber line that only goes to one place.  

In the IP world, it's more of an organizational concept.  I have separate 
config files - sip-trunks.conf and sip-phones.conf

sip-trunks is where I put config to help my machine talk to other machines.
sip-phones is were the configuration for phones go.
It really doesn't matter, since it's all the same file.  It's just saying it 
that way because that's what that type of connection would be doing in a 
traditional telephony way of thinking.

On September 1, 2006 20:42, Larry Alkoff wrote:
> I'm configuring a Sipura SPA-3000 to go with my existing and working
> Asterisk 1.2.5 setup.
>
> The Sipura configuration files give an extension context [201] in
> sip.conf with the instruction "This goes into the Incoming settings for
> your Trunk".
>
> It also gives a extension context of [pstn-spa3k] in sip.conf with the
> instruction "This section goes into the Outgoing Settings for your Trunk".
>
> What does 'Incoming' and 'Outgoing' settings for your trunk mean?
> Where do trunks live and what are they meant to do?
>
> In my setup I have in sip.conf a [telasip-gw] context that references a
> context=telasip-in in extensions.conf.
>
> In extensions I have a [telasip-in] and [telasip-out] context.
>
> Which if any of these are 'trunks'?
>
> The Future of Telephony doesn't say much about trunks.
>
> Larry

-- 
Tim St. Pierre

IP telephony specialist
sip://5101@communicatefreely.net
Toronto: 647 722 6930
Toll-Free 1 888 488 6940
tim at communicatefreely.net
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