[asterisk-users] How to set up Asterisk to deliver a trunk sip connection?

[Kent Varmedal]

On Wed, 2010-08-11 at 10:29 -0400, David Backeberg wrote:
> On Wed, Aug 11, 2010 at 10:12 AM, Kent Varmedal <kent at domeneshop.no> wrote:
> > I'm trying to set up an "old" PBX (that supports SIP) to go through our
> > new Asterisk server, so that our old phones can be used still for some
> > time.
> >
> > How can I set up Asterisk to deliver a trunk sip connection that our old
> > PBX can connect to? Is it just to sett up a normal sip device in
> > sip.conf? Or is there some other / extra magic for this to work?
> 
> Pretty much. The details vary on codec / DTMF, etc. based on what
> you're talking to, but that's the general idea.
> 
> > I can't test this with the old system before we go live with Asterisk
> > (and then it must work).
> 
> Really? Why not? If it speaks SIP, it should be able to do multiple
> SIP trunks / channels, and you should be able to set up a simultaneous
> SIP trunk alongside your production line(s).
> 

We need to upgrade this PBX for it to work with SIP, it is at the moment
using ISDN. And those who delivered it and do the
support/reconfiguration is paid by the hour. We don't have any control
over it our self, so when it is changed it will stay that way.

> If you tell us the PBX, somebody here has probably worked with it.
> 

It is a Ascotel intelliGate 2025/2045.

> If the old PBX speaks true SIP, you could ditch the old PBX, and have
> the SIP phones register directly with asterisk.
> 

We don't have any SIP phones at the moment, we use DECT phones from
Aastra (not the IP version). New phones will probably be SIP. 


Best regards,
Kent Varmedal