[Spce-user] SIP trunking

Jon Bonilla (Manwe) jbonilla at sipwise.com
Tue Nov 6 07:24:01 EST 2012

El Mon, 5 Nov 2012 16:34:00 +0000
Sylvester Nielsen <sn at fest.dk> escribió:

> Hi,
> I'm trying to get the system to provide SIP trunking but i'm facing some
> issues.
> I have set the e164_to_ruri parameter which allows the PBX to do DID based
> routing. This parts seems to be working on all the systems i tested it on.
> However, outbound calls from the PBX's seems to be more challenging.
> Like the e164_to_ruri on inbound i would like to do the same on outbound,
> putting the caller number in the from header. But in this case i get a 407
> Proxy Authentication Required.
> I changed the from header to display the trunk username, which solved the
> authentication issue. However, only some PBX's allow me to do this. Also, if
> a user tries to make anonymous calls, the from header is changed to anonymous
> on most PBX's. However they do send a P-asserted-Identity, RPID, or
> P-preffered header along with the privacy header.
> Is there some parameter i have missed which allow me to change this behavior
> and is it even possible to handle this behavior? I have found that i can use
> the permanent contact and trusted sources, but is it possible with a normal
> registration or does this require the user to send the sip username in the
> from header?

Hi Sylvester

You can choose the where the system will extract the upn (user provided number)
from by setting this preference: "inbound_upn"

The npn (network provided number) will always be the main E164 number of the

Then you can select for each domain/peer/subscriber how to map (if desired)
each number with each header.


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