asterisk users - Dec 2003 - fax detection: false positive

Hi guys,

I just moved from Asterisk release 0.5.0 to CVS 2003-12-22, and after 
overcoming a few changes in my configuration, I encountered one problem 
that I couldn't shake that was working fine in 0.5.0.

It's the fax detection.  I just have a simple extension setup like this:

	exten => fax,1,Dial(Zap/4,30,tr)
	exten => fax,2,Hangup

in my main incoming context.  This used to work fine, I don't think I 
ever had a false positive or negative, but now just about every call 
(possibly every call) that comes in when I've got that extension defined 
rolls to my fax machine on Zap/4 immediately.

I'm sure others have encountered this and I missed a post on some change 
to the configuration that might be causing this.

Thanks for your help.

jl

On Friday 26 December 2003 13:42, john lawler wrote:
> Hi guys,
>
> I just moved from Asterisk release 0.5.0 to CVS 2003-12-22, and
> after overcoming a few changes in my configuration, I encountered
> one problem that I couldn't shake that was working fine in 0.5.0.
>
> It's the fax detection.  I just have a simple extension setup like
> this:
>
> 	exten => fax,1,Dial(Zap/4,30,tr)
> 	exten => fax,2,Hangup
>
> in my main incoming context.  This used to work fine, I don't think
> I ever had a false positive or negative, but now just about every
> call (possibly every call) that comes in when I've got that
> extension defined rolls to my fax machine on Zap/4 immediately.
Uncomment OLD_DSP_ROUTINES near the top of dsp.c, recompile,
install, and restart.

The newer DSP routines are used to fix a type of signalling on E&M
lines.

-Tilghman

john lawler wrote:
> Hi guys,
>
> I just moved from Asterisk release 0.5.0 to CVS 2003-12-22, and after 
> overcoming a few changes in my configuration, I encountered one 
> problem that I couldn't shake that was working fine in 0.5.0.
>
> It's the fax detection.  I just have a simple extension setup like
this:
>
>     exten => fax,1,Dial(Zap/4,30,tr)
>     exten => fax,2,Hangup
>
> in my main incoming context.  This used to work fine, I don't think I 
> ever had a false positive or negative, but now just about every call 
> (possibly every call) that comes in when I've got that extension 
> defined rolls to my fax machine on Zap/4 immediately.
>
> I'm sure others have encountered this and I missed a post on some 
> change to the configuration that might be causing this.
>
> Thanks for your help.
>
> jl
The issue is in dsp.c.  Check out an old copy of dsp.c and replace the 
one in your source tree.  Then recompile.  I am using the file from 
12/08/03, as someone noted that this one works.

ajh