[asterisk-users] Sending faxes with T.38 problem. Asterisk - 1.6.0.6

[Santiago Gimeno]

Thanks for the tip. Sadly, it didn't work. I keep getting the same error:

[Mar 10 18:49:48] WARNING[18855]: app_fax.c:176 phase_e_handler: Error
transmitting fax. result=11: Far end cannot receive at the resolution of the
image.

regards,

Santi

On Tue, Mar 10, 2009 at 6:36 PM, Matthew Fredrickson <creslin at digium.com>wrote:

> Santiago Gimeno wrote:
> > Hello,
> >
> > Thanks everybody for the answers.
> >
> >  >Could be. Would you post the Cisco config relevant to this?
> >
> > dial-peer voice 5 voip
> > description ** **
> > preference 1
> > destination-pattern 1…
> > voice-class codec 1
> > session protocol sipv2
> > session target ipv4:1.1.1.1
> > session transport udp
> > dtmf-relay rtp-nte
> > fax-relay ecm disable
>
> I think, that at least if you're using T.38, you may want to try
> enabling ECM.  ECM can cause significant problems in a high-packet loss,
> non-T.38 environment, but I would think that in a T.38 environment, if
> you can keep ECM enabled, that would be a good thing.
>
> Matthew Fredrickson
> Digium, Inc.
>
> > fax nsf 000000
> > fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback pass-through
> > g711alaw
> > no vad
> >
> >
> >  >And upon further examination... don't put T38CALL in as a variable. It
> > will cause the initial INVITE to only
> >  >have T38. Leave it out and things should hopefully reinvite.
> >
> > I have removed the T38CALL variable and it looks better but it still
> > doesn't work.
> > Now asterisk sends an initial INVITE with audio media in the SDP. The
> > CISCO accepts this call after contacting the fax-machine. Then the CISCO
> > sends a re-INVITE with the T.38 SDP. Asterisk accepts this re-INVITE.
> > But finally the fax transmission fails and the asterisk verbose trace is:
> >
> > *CLI>     -- Attempting call on SIP/080913216002 at outbound-calls for
> > 22222 at fax-out:1 (Retry 1)
> >   == Using SIP RTP CoS mark 5
> >   == Using UDPTL CoS mark 5
> >        > Channel SIP/outbound-calls-0822aae8 was answered.
> >   == Starting SIP/outbound-calls-0822aae8 at fax-out,22222,1 failed so
> > falling back to exten 's'
> >     -- Executing [s at fax-out:1] Set("SIP/outbound-calls-0822aae8",
> > "FAXFILE=/root/santi/fax/prueba.tif") in new stack
> >     -- Executing [s at fax-out:2]
> > SIPDtmfMode("SIP/outbound-calls-0822aae8", "inband") in new stack
> >     -- Executing [s at fax-out:3] SendFAX("SIP/outbound-calls-0822aae8",
> > "/root/santi/fax/prueba.tif") in new stack
> > [Mar 10 17:15:28] WARNING[17125]: app_fax.c:176 phase_e_handler: Error
> > transmitting fax. result=11: Far end cannot receive at the resolution of
> > the image.
> > [Mar 10 17:15:28] WARNING[17125]: app_fax.c:621 transmit: Transmission
> error
> >   == Spawn extension (fax-out, s, 3) exited non-zero on
> > 'SIP/outbound-calls-0822aae8'
> >
> > Any ideas?
> >
> > Thanks. Best regards,
> >
> > Santi
> >
> >
> >
> > On Tue, Mar 10, 2009 at 4:26 PM, Joshua Colp <jcolp at digium.com
> > <mailto:jcolp at digium.com>> wrote:
> >  >
> >  > ----- "Santiago Gimeno" <santiago.gimeno at gmail.com
> > <mailto:santiago.gimeno at gmail.com>> wrote:
> >  >
> >  > >
> >  > > **The call-file I'm using is:
> >  > >
> >  > > Channel: SIP/080999999999 at outbound-
> >  > > calls
> >  > > MaxRetries: 3
> >  > > WaitTime: 30
> >  > > Set: LOCALSTATIONID=22222
> >  > > Set: LOCALHEADERINFO=T38 fax
> >  > > Set: T38CALL=1
> >  > > Set: T38TXDETECT=yes
> >  > > CallerID: 22222
> >  > > Context: fax-out
> >  > > Extension: 22222
> >  > > priority:1
> >  > >
> >  >
> >  > And upon further examination... don't put T38CALL in as a variable.
> > It will cause the initial INVITE to only
> >  > have T38. Leave it out and things should hopefully reinvite.
> >  >
> >  > --
> >  > Joshua Colp
> >  > Digium, Inc. | Software Developer
> >  > 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> >  > Check us out at:  www.digium.com <http://www.digium.com>  &
> > www.asterisk.org <http://www.asterisk.org>
> >  >
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