[Asterisk-Users] SpanDSP + Lexmark 6170 = Cut off faxes?

[Steve Underwood]

Andrew Kohlsmith wrote:

>On November 8, 2004 06:41 pm, Steve Underwood wrote:
>  
>
>>I have looked at many similar reports, and all but one turned out to be
>>due to data slips. However, if you are sure this is only happening with
>>one particular FAX machine your problem might be different. In t30.c
>>uncomment the first line. Rebuild spandsp and try FAXing. You should get
>>audio log files in /tmp. Send them to me, and I will investigate.
>>    
>>
>
>Since there are so many problems with timing slips, would it be prudent to put 
>some kind of log in the spandsp code that it spits out a warning something 
>along the lines of "Warning: timing slip detected" to help reduce your time 
>involved in debugging these issues?
>
>I'm pretty sure you already have some kind of code in-house which helps you do 
>this (when you play back the audio files) -- can you elaborate a little on 
>how you debug this stuff?
>  
>
It isn't that easy to detect reliably (other than simply saying failure 
== frame slip). Currently I do it my manual analysis of audio logs. 
However, I need to do something, as this is becoming a real support hassle.

Steve