[Freeswitch-users] T.38 via UPDATE request

[Anthony Minessale]

I'm sure it won't work because we only implemented forwarding t38 with
invite
it would require adding code to say the least.


On Fri, Oct 16, 2009 at 9:35 AM, Peter P GMX <Prometheus001 at gmx.net> wrote:

> Hello Michael
>
> this is a productive system, so I can currently not update to the
> current trunk.
> But the installed SVN is 14741. Were those changes after 14741? Then
> I'll try to find a timeslot at night in order to update freeswitch.
>
> But Freeswitch should forward the UPDATE request in proxy-media mode,
> right?
>
> Best regards
> Peter
>
> Michael Jerris schrieb:
> > There was just a bunch of work on UPDATE, can you confirm this is the
> > same behavior with trunk?
> >
> > On Oct 14, 2009, at 6:55 AM, Peter P GMX wrote:
> >
> >
> >> Hello,
> >>
> >> we have the following problem.
> >> 2 Fax machines are communicating via Freeswitch. One is externally
> >> attached via a Telco who is able to handle T.38. The other one is
> >> attached locally.
> >>
> >> When 2 Fax machines start syncing each other, the Telco sends a SIP
> >> UPDATE message with T.38 SDP, as it detects fax during the fax
> >> negociations.
> >> Freeswitch answers with an SIP OK message back to the telco, and I can
> >> see the T.38 SDP on the debug console of freeswitch.
> >> Then nothing happens any more until one of fax machines detects
> >> timeout.
> >>
> >> We have set proxy-media to true. However is was done during call setup
> >> when both machines communicated with G711 SDP.
> >> The UPDATE message was commited by FS to the telco, but was not sent
> >> to
> >> the other fax, so I think in this case Freeswitch is supposed to
> >> transcode between T.38 and G711 which it cannot do, as we know.
> >>
> >> How can I overcome this scenario? Is this a defect, should freeswitch
> >> send the UPDATE message to the other fax?  Or is there a workaround?
> >>
> >> Best regards
> >> Peter
> >>
> >
> >
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> >
>
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-- 
Anthony Minessale II

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