[Asterisk-Users] RxFAX generates no tiff file
Steve Underwood
steveu at coppice.org
Sat May 22 23:13:19 MST 2004
HI Troy,
There are frame slips in your audio stream. That is why things go wrong.
The QAM modulation used for most of the faster modems (including the FAX
modems) cannot tolerate even a single audio sample dropped from the
stream - it represents a huge phase shift :-\
Are you using a T1 oe E1? If so, check your clock source. The commonest
reason for sample slips is that you are not synching to the network.
Regards,
Steve
Troy Settle wrote:
>Running spandsp 0.0.1k, tiff 3.5.7.
>
>I put some audio log files in the same directory.
>
>Thanks,
>
>--
> Troy Settle
> Pulaski Networks
> http://www.psknet.com
> 866.477.5638
>
>
>
>
>>-----Original Message-----
>>From: asterisk-users-admin at lists.digium.com
>>[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of
>>Steve Underwood
>>Sent: Saturday, May 22, 2004 10:27 PM
>>To: asterisk-users at lists.digium.com
>>Subject: Re: [Asterisk-Users] RxFAX generates no tiff file
>>
>>Hi Troy,
>>
>>People had a lot of problems like this with earlier versions
>>of spandsp.
>>However, the latest version is pretty solid, and people are
>>using it in
>>high volume production applications. If you are getting these bad
>>results with the latest version I would be interested to see
>>the audio
>>log file, so I can investigate the reason.
>>
>>Regards,
>>Steve
>>
>>
>>Troy Settle wrote:
>>
>>
>>
>>>Dunno about not being able to generate a tiff, I got rxfax
>>>
>>>
>>to do that, but
>>
>>
>>>they're badly malformed.
>>>
>>>http://roanoke-voip01.psknet.com/fax/
>>>
>>>
>>>
>>>--
>>> Troy Settle
>>> Pulaski Networks
>>> http://www.psknet.com
>>> 866.477.5638
>>>
>>>
>>>
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