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

[David Backeberg]

On Wed, Aug 11, 2010 at 11:24 AM, Kent Varmedal <kent at domeneshop.no> wrote:
> 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 have a spare ISDN card, you may prefer to integrate it over
T1/E1/PRI rather than over SIP.

The bigger barrier is you not having control of the system.

It's made a lot tougher by not having a way to experiment except to be
dead-in-the-water.