[Spce-user] SIP trunk to PBX

Jon Bonilla (Manwe) jbonilla at sipwise.com
Thu Aug 9 03:46:02 EDT 2012

El Tue, 7 Aug 2012 23:27:35 +0100
"John Murray" <john.murray at skyracktelecom.com> escribió:

> Sorry Jon,
> What I mean is I do not know the IP address of the PBX until it registers (it
> is on a broadband line with an IP address that can vary) so I cannot create
> permanent contacts to it. So can I create permanent contacts for those users
> pointing to the registering user, which then registers and gets an IP address?

Not sure if you can get the contact via provisioning interface (would need to
check it with the provisioning guys but I guess so). You could get it and
edit/create permanent contacts for the rest of the contacts. This is quite

Another good alternative could be if we could add fqdn entries as permanent
contacts and use DNS to send the requests. Then, a dyndns like service could do
the job. I've briefly tried with a personal domain of mine and seems to work. No

Added permanent contact like this one:

sip:2333 at sipdoc.net:5060

And then I get:

U 2012/08/09 09:41:49.650229 ->
INVITE sip:2333 at sipdoc.net:5060 SIP/2.0'
Max-Forwards: 10'

You could even have SRV dns entries and just change your A with dyndns or some
similar service. The lb has dns srv enabled by default.

Hope it helps. Please report back with any feedback.



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