[Users] T.38 together with OpenSER+RTPProxy and OpenPBX not working

[Ovidiu Sas]

Hi Bastien,

If you see incoming and outgoing udptl traffic on both SIP-FAX
devices, capture it and load the file on wireshark.  Check the T.38
signaling and see where it is failing and why.
As an example/reference, use a capture from a working case.


Regards,
Ovidiu Sas

On 11/17/06, Bastian Schern <ml02 at in-bln.de> wrote:
> Hi Bogdan,
>
> I think it has nothing to do with a deadlock. I see the incoming and
> outgoing UDPTL traffic on both SIP-FAX devices.
>
> Do you got a suggestion for me, what I could do to locate and resolve the
> problem.
>
> Cheers
>         Bastian
>
> --On Donnerstag, 16. November 2006 14:12 +0200 Bogdan-Andrei Iancu
> <bogdan at voice-system.ro> wrote:
>
> > Hi Bastin,
> >
> > probably there is  kind of a RTP deadlock between the RTPproxy and
> > OpenPBX - both are waiting for the other party to send the media before
> > sending on its turn.
> >
> > try something like:
> >     if (nat_uac_test("8")) {
> >           force_rtp_proxy();
> >     } else {
> >           force_rtp_proxy("r");
> >     }
> >
> > refer to http://www.openser.org/docs/modules/1.2.x/nathelper.html for
> > more details.
> >
> > regards,
> > bogdan
> >
> >
> > Bastian Schern wrote:
> >
> >> Hi everybody,
> >>
> >> I've got a question: Does anybody get T.38 working between OpenPBX and
> >> OpenSER + RTPProxy?
> >>
> >> The following scenarios are working fine:
> >>
> >> 1: SIP-FAX1 (pub. IP) <-> OpenPBX             <-> SIP-FAX2 (pub. IP)
> >> 2: SIP-FAX1 (NAT)     <-> RTPProxy+OpenSER    <-> SIP-FAX2 (pub. IP)
> >> 3: SIP-FAX1 (NAT)     <-> RTPProxy+OpenSER    <-> SIP-FAX2 (NAT)
> >> 4: SIP-FAX1 (pub. IP) <-> OpenSER <-> OpenPBX <-> SIP-FAX2 (pub. IP)
> >>
> >>
> >> But the following scenario is not working:
> >>
> >> SIP-FAX1 (NAT) <-> RTPProxy+OpenSER <-> OpenPBX <-> SIP-FAX2 (pub. IP)
> >>
> >>
> >>
> >> It seems to be that the RTPproxy has a problem with the OpenPBX but no
> >> Problem with SIP-FAX-ATAs.
> >>
> >> Does anybody have an idea what's going wrong???
> >>
> >>
> >> Cheers
> >>     Bastian
> >>
> >> _______________________________________________
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> >> Users at openser.org
> >> http://openser.org/cgi-bin/mailman/listinfo/users
> >>
> >
>
>
>
>
>
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