[Freeswitch-users] T.38/fax problem

[Steve Underwood]

Hi Marcin,

Post it somewhere, and I will take a look.

Steve

On 10/18/2012 05:30 AM, Marcin Gozdalik wrote:
> I have a pcap and can open in Wireshark. Starts with PCMU, switches to 
> T.38. Wireshark (newest, 1.8.3) has trouble dissecting some packets 
> (lots of UNKNOWN PER) and unfortunately I am no expert to tell if 
> there is anything wrong.
>
> Would anybody be able to help in debugging the issue having the PCAP? 
> I can post it somewhere to download.
>
> Best regards
>
> 2012/10/17 Michael Collins <msc at freeswitch.org 
> <mailto:msc at freeswitch.org>>
>
>     Can you get a pcap of this and open in wireshark? I think it might
>     give you a bigger picture of what's happening.
>     -MC
>
>     On Wed, Oct 17, 2012 at 7:02 AM, Marcin Gozdalik <gozdal at gmail.com
>     <mailto:gozdal at gmail.com>> wrote:
>
>         Hi
>
>         I'm trying to send a fax from FreeSWITCH using T.38 (via Cisco
>         SIP gateway) to a remote fax. It fails with some cryptic messages:
>
>         2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW
>         T.30 T4A expired in phase T30_PHASE_D_RX, state 27. An HDLC
>         frame lasted
>          too long.
>         2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW
>         T.30 Status changing to 'The HDLC carrier did not stop in a
>         timely manne
>         r'
>         2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW
>         T.30 Disconnecting
>         2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW
>         T.30 Changing from phase T30_PHASE_D_RX to T30_PHASE_E
>
>         I do have full SIP/RTP dump of such a call if it is of any
>         interest. It seems to be a peculiar interoperability issue, as
>         this setup is used as a email2fax/fax2email gateway and it
>         works quite well.
>
>         Could anybody recommend any steps I could try to debug/fix the
>         issue?
>
>         Best regards
>
>         -- 
>         Marcin Gozdalik
>
>         _________________________________________________________________________
>         Professional FreeSWITCH Consulting Services:
>         consulting at freeswitch.org <mailto:consulting at freeswitch.org>
>         http://www.freeswitchsolutions.com
>
>         
>         
>
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>
>     -- 
>     Michael S Collins
>     Twitter: @mercutioviz
>     http://www.FreeSWITCH.org
>     http://www.ClueCon.com
>     http://www.OSTAG.org
>
>
>
>     _________________________________________________________________________
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>     http://www.freeswitchsolutions.com
>
>     
>     
>
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>
> -- 
> Marcin Gozdalik
>
>
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
>
> 
> 
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