[Asterisk-Users] RxFAX generates no tiff file

[Steve Underwood]

Hi Darren

If you are seeing IRQ misses there must be data misses too. :-)

Regards,
Steve


Darren Nickerson wrote:

>Steve,
>
>We have no frame slips, so we probably have a frame slip problem ;-)
>
>This may be plaguing us on our faxing. Gain and echo cancelation (ie: none)
>are all approximately correct, and yet still we cannot get reliable faxing
>through the POTS lines plugged into our FXO card on the Adit (whereas we can
>fax well when using the POTS lines directly). Faxing T1 -> T1 via a TE405P
>works well, ... it's only when we try to use the connection to the Adit (24
>fxs_ks channels in a T1) that things go horribly wrong.
>
>Is there any sure-fire way to detect frame slips? I see a counter for IRQ
>misses with zttool, but that's all. In my Adit600 I see lots of measures of
>errors (line errored seconds, controlled slip seconds, bursty errored
>seconds etc) but they're all zero.
>
>Am I missing an obvious way to detect./observe these events?
>
>-Darren
>
>--
>Darren Nickerson
>Senior Sales & Support Engineer
>iFax Solutions, Inc. www.ifax.com
>darren.nickerson at ifax.com
>+1.215.438.4638
>+1.215.243.8335 (fax)
>
>----- Original Message ----- 
>From: "Steve Underwood" <steveu at coppice.org>
>To: <asterisk-users at lists.digium.com>
>Sent: Sunday, May 23, 2004 8:03 PM
>Subject: Re: [Asterisk-Users] RxFAX generates no tiff file
>
>
>  
>
>>Hi Petr,
>>
>>For most people who are sure they have no frame slips, the problem
>>usually turns out to be frame slips :-)
>>
>>If you are *really* sure you do not have frame slips, then uncomment the
>>first line in t30.c, and rebuild and reinstall spandsp. The when you
>>exchange a fax you should end up with a pair of audio files in your /tmp
>>directory - one for the transmit signal and one for the receive signal.
>>Send those to me, and I will investigate.
>>
>>Regards,
>>Steve
>>
>>
>>Petr Grussmann wrote:
>>
>>    
>>
>>>I have same problem connected to PBX over E1 and sync and not slip I
>>>have latest version spanDSP
>>>
>>>I receiving 1/3 pages from faxis
>>>
>>>?
>>>who is a problems-)
>>>
>>>
>>>I
>>>Steve Underwood wrote:
>>>
>>>      
>>>
>>>>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/
>>>>>          
>>>>>