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

[Luis Daniel Lucio Quiroz]

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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