[Freeswitch-users] Faxing transcoding issues.

[Andrew Cassidy]

I'm getting the same with 1.6.9

Ideally I'd like FreeSWITCH to be able to determine on the fly that the
sender supports T38.

Kind regards,

On 4 August 2016 at 10:27, Mirko Brankovic <mirkobrankovic at gmail.com> wrote:

> From my experiance if you send t38 re-invite then FS will expect T38 even
> if remote side refuses it.
>
> If you wont to transcode you need to not send the re-invite.
>
> Get the scenario you need form here:
> https://wiki.freeswitch.org/wiki/Mod_spandsp#t38_gateway
>
> -mirko
>
> On Thu, Aug 4, 2016 at 10:55 AM, Andrew Cassidy <
> andrew at cassidywebservices.co.uk> wrote:
>
>> Good morning all,
>>
>> I've been playing with faxing and t38 over the last few days. I use a
>> wholesale provider who detects and reinvites for t38, and have implemented
>> the same in my systems. Passing t38 through unmodified is not an issue.
>>
>> The issue I do have, is in the event that the sender refuses the
>> reinvite, I'd like freeswitch to transcode. In theory, this is set up
>> correctly, but see this error message repeated over and over and ultimately
>> the fax fails:
>>
>> [DEBUG] mod_spandsp_fax.c:1756 sofia/external/xxx at provider.com Error
>> decoding UDPTL (172 bytes)
>>
>> Every other scenario I have worked through is working fine.
>>
>> For reference, the fax-specific dialplan entries:
>>
>> <action application="export" data="fax_enable_t38=true"/>
>> <action application="export" data="fax_enable_t38_request=true"/>
>> <action application="export" data="t38_passthru=true"/>
>> <action application="export"
>> data="nolocal:sip_execute_on_image=t38_gateway self" />
>> <action application="set" data="execute_on_answer=t38_gateway peer" />
>>
>> Thanks in advance.
>>
>> --
>> *Andrew Cassidy BSc (Hons) MBCS SSCA*
>> Managing Director
>>
>> 03303 880 960 andrew at cassidyweb.co.uk <andrew at cassidywebservices.co.uk>
>> www.cassidyweb.co.uk <http://www.cassidywebservices.co.uk>
>>
>> _________________________________________________________________________
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>>
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>
>
>
> --
> Regards,
> Mirko
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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> http://confluence.freeswitch.org
> http://www.cluecon.com
>
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-- 
*Andrew Cassidy BSc (Hons) MBCS SSCA*
Managing Director

03303 880 960 andrew at cassidyweb.co.uk <andrew at cassidywebservices.co.uk>
www.cassidyweb.co.uk <http://www.cassidywebservices.co.uk>
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