[Freeswitch-users] Faxing transcoding issues.

Thu Aug 4 17:30:27 MSD 2016

Had a look at the code, I think the only real option is still "disable t.38
everywhere"...

On 4 August 2016 at 14:02, Mirko Brankovic <mirkobrankovic at gmail.com> wrote:

> exactly, or a 2-liner :)
>
> On Thu, Aug 4, 2016 at 2:11 PM, Andrew Cassidy <
> andrew at cassidywebservices.co.uk> wrote:
>
>> I might be able to sort this with a 1-liner... going to give it a go.
>>
>>
>> On 4 August 2016 at 12:47, Mirko Brankovic <mirkobrankovic at gmail.com>
>> wrote:
>>
>>> 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
>>>>>>
>>>>>> 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:
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>>>>>> http://www.freeswitch.org
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> 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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>>>>> http://www.freeswitch.org
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> *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
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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
>>>
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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
>
> _________________________________________________________________________
> 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
>
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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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