[Freeswitch-users] Faxing transcoding issues.

[Mirko Brankovic]

I had the same question.

There is no fall back to previous codec that call was set up when t38 is
negotiated no matter that was the sucess of that negotiation

You can always file a feature/bug maybe request...
mirko

On Thu, Aug 4, 2016 at 1:33 PM, Andrew Cassidy <
andrew at cassidywebservices.co.uk> wrote:

> 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>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
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>>> http://www.freeswitch.org
>>> http://confluence.freeswitch.org
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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
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
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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>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>



-- 
Regards,
Mirko
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