[cisco-voip] Authenticated SIP trunk

[Kelemen Zoltan]

I wonder what would they consider "not a small amount". When you think 
that one selling point in IP telephony used to be "free interoperability 
with other VoIP networks", the thing is pretty difficult to obtain. 
True, once external VoIP link might not have been important at all, 
however, with the growth of companies (and even some "serious ones") 
offering cheap VoIP connectivity, mostly through SIP, not being able to 
interconnect to those with your new, shiny and expensive VoIP system 
just seems a bit ... underwhelming.
</flame>

I did such a thing once, inserting an Asterisk server between the CCM 
and the SIP provider (and thus let Asterisk handle authentication), 
however, for one reason or another, the thing wasn't really stable, so 
the idea was dropped (that same Asterisk box remains as a voicemail, 
though :) ). You might have more luck with a proper SIP server (Asterisk 
being an IP PBX, but not a complete SIP implementation) or, perhaps if 
you can talk your provider into allowing unauthenticated connections 
from your IP (good luck with that but it's an idea, anyway)

regards,
  Zoltan

Matt Slaga (US) wrote:
>
> This cannot be done.  Cisco focuses on wholesale trunks, not on single 
> line sip provider.  I have only been able to get outbound dialing to 
> work, and when I questioned the CCM BU about it, they said that is not 
> even on their roadmap because of the small amount of requests.
>
>  
>
> *From:* cisco-voip-bounces at puck.nether.net 
> [mailto:cisco-voip-bounces at puck.nether.net] *On Behalf Of *Christian 
> Hennrich
> *Sent:* Tuesday, September 11, 2007 3:03 AM
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] Authenticated SIP trunk
>
>  
>
> Hi,
>
> I'm playing around with CM 6.0 and I'm trying to call over an carpo.de 
> SIP trunk. Unfortunately this does not work.
>
> Has anyone succesfully configured CM 5.X or 6.X to use authenticated 
> SIP trunks? sipgate or any other free SIP provider?
>
> I have followed the Cisco manuals to configure the trunk in the 
> security guide, but with no success. A guidance would be very helpful.
>
> Cheers
> Christian
>
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