The challenge is that calls to extensions on the Nortel have to ring the
nortel phone AND the sip phone connected to Asterisk.  

-----Original Message-----
From: asterisk-users-boun...@lists.digium.com
[mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Daniel Tryba
Sent: Wednesday, April 11, 2018 4:26 PM
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
<asterisk-users@lists.digium.com>
Subject: Re: [asterisk-users] Pass through registration / proxy

On Wed, Apr 11, 2018 at 12:04:18PM -0400, Telium Technical Support wrote:
> Maybe proxy is the wrong word I chose.  Asterisk is something like a 
> peer to the legacy PBX.  I thought about setting up individual SIP 
> accounts on the Asterisk box to connect to the legacy PBX, or maybe a 
> SIP trunk to the legacy PBX (assuming it can route calls through the 
> SIP trunk to a peer to reach a phone).  The legacy PBX is a Nortel in case
that matters.
> 
> I'm supposed to figure this out and present options but having trouble 
> figuring out if Asterisk would be a peer, or pretend to be many sip 
> agents registering on the legacy Sip pbx, etc.  I think I'm stuck at 
> the conceptual level.  (Still a beginner in training - but having fun 
> learning Asterisk)

One of my first integrations was similar but with a Siemens. Easiest might
be a SIP trunk (peer) between Asterisk/Nortel and have different prefixes
for the Norted (1xx) and Asterisk (2xx) and route these to the other. The
SIP endpoints simply register to Asterisk.


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