[Freeswitch-users] fax goes out at 9600 but not at 14400

Wed Mar 27 22:51:34 MSK 2013

no, i mean it negotiates but must part of times it goes to 14400, when
faxes go at that speed they fail

I need to tell freeswitch somehow to only negotiate 9600, can you help me?

2013/3/27 Michael Jerris <mike at jerris.com>:
> v29 is the 9600 modem.  Is it not negotiating this already?
>
> On Mar 27, 2013, at 11:24 AM, Luis Daniel Lucio Quiroz <luis.daniel.lucio at gmail.com> wrote:
>
>> ok,  then i change my questio
>>
>> how can i force v29?
>>
>> 2013/3/27 Steve Underwood <steveu at coppice.org>:
>>> On 03/27/2013 12:34 PM, Luis Daniel Lucio Quiroz wrote:
>>>> Steve,  from my side there is not ATA plugged.
>>>>
>>>> can you suggest me a workarround?
>>> Workaround? There is no magic solution for a broken path. What is the
>>> path between your FS box and the FAX machine? It can't be a low bit rate
>>> codec problem, as they breaks all modems. A G.726 link in the path could
>>> explain it. That codec works for V.29 pretty well, but V.17 won't get
>>> through it. The problem usually turns out to be a low quality
>>> analogue-to-digital interface somewhere in the path.
>>>
>>> Steve
>>>>
>>>> 2013/3/26 Steve Underwood <steveu at coppice.org>:
>>>>> Hi,
>>>>>
>>>>> The commonest reason for 14,400 failing and 9600 working is the call is
>>>>> going out through a poor quality ATA. A *lot* of ATAs seem to badly
>>>>> degrade the analogue signal. If it were a digital domain issue, like
>>>>> packet loss or a jitter buffer messing up the timing of the signal, this
>>>>> should affect 9600 just as much as 14,400.
>>>>>
>>>>> Regards,
>>>>> Steve
>>>>>
>>>>> On 03/27/2013 07:22 AM, Luis Daniel Lucio Quiroz wrote:
>>>>>> Hello
>>>>>>
>>>>>> Look
>>>>>>
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:487
>>>>>> ==============================================================================
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:500 Fax
>>>>>> processing not successful - result (49) The call dropped prematurely.
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:505 Remote station id:
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:506 Local station
>>>>>> id:  SpanDSP Fax Ident
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:507 Pages transferred: 0
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:509 Total fax pages:   0
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:510 Image resolution:  0x0
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:511 Transfer
>>>>>> Rate:     14400
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:513 ECM status         off
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:514 remote country:
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:515 remote vendor:
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:516 remote model:
>>>>>> 2013-03-26 19:12:42.602751 [DEBUG] mod_spandsp_fax.c:518
>>>>>> ==============================================================================
>>>>>>
>>>>>> Bug if transfer rate is 9600 it goes for good.
>>>>>>
>>>>>> Currently Im passing these variables, but seems it is not working.
>>>>>>
>>>>>>
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_ivr_originate.c:2005 Parsing
>>>>>> global variables
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [disable-v17]=[true]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_v17_disabled]=[true]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_disable_v17]=[true]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_transfer_rate]=[9600]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [ignore_early_media]=[true]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [absolute_codec_string]=[PCMU]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [origination_caller_id_name]=[anonymous]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [origination_caller_id_number]=[16138007358]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_enable_t38]=[false]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_retry_attempts]=[32]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_retry_limit]=[32]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_retry_sleep]=[180]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_verbose]=[true]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_use_ecm]=[off]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [fax_enable_t38_request]=[false]
>>>>>> 2013-03-26 19:12:08.632735 [DEBUG] switch_event.c:1569 Parsing
>>>>>> variable [execute_on_fax_success]=[system
>>>>>> /usr/local/bin/email2fax.unqueue
>>>>>> /var/spool/push.fax/1981467.bl4Q53kE2n at everardo.okay.com.mx
>>>>>> test.pdf.tiff.to.16136997792 at faxofaxo.com.job]
>>>>>>
>>>>>>
>>>>>> Does anyone have an idea?
>>>>>>
>>>>>> LD
>>>>>>
>>>
>>>
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>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
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>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
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>
>
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
>
> 
> 
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