[Asterisk-Users] Problem with DTMF 'looping' / mis-dials (X100P card)

[Eric Wieling]

In the sample zaptel.conf file (see the asterisk source directory) there
is the following:
;
; If you are having trouble with DTMF detection, you can relax the
; DTMF detection parameters.  Relaxing them may make the DTMF detector
; more likely to have "talkoff" where DTMF is detected when it
; shouldn't be.
;

I'm not going to post the actual parameter since you can look it up in
the sample config file that comes with Asterisk easy enough.  Take the
time to read thru the file just in case there are some other paramters
that you might find useful.  Just don't use the callprogress or
busydetect options.


On Fri, 2003-10-10 at 00:27, Sam S wrote:
> Hi all,
> 
> I'm having a problem with * being very finicky about the length of 
> DTMF key-presses during menus, voicemail, etc. Basically, short (<100 
> ms) tones are ignored, anything between 100ms (or so) and about 300ms 
> is correctly detected, and anything >300ms is interpreted as multiple 
> presses of the same key. This is terrible for callers who are trying 
> to get to the correct extension number, delete a voicemail message, 
> etc.
> 
> Any ideas why this is happening, or how to fix it? I searched the 
> mailing list back to 7/1/03 but found no mention. Here's my * setup. 
> Note presence of Vodavi Starplus DHS phone system in call path.
> 
> Pentium II -350 / Redhat 9.0 / (3) X100P cards
> X100P cards are connected to an Analog SLT adaptor, which goes to a 
> digital ports on a Vodavi StarPlus DHS phone system. (So call path 
> is: PSTN --> Vodavi Starplus --> Analog SLT adaptor --> X100P card.)
> Asterisk CVS-08/29/03-09:23:49
> 
> I have not updated to the most recent CVS because of various problems 
> I've seen cropping up on the bug tracking site.. Something tells me 
> this is not CVS-related but perhaps something to do with the Vodavi. 
> Any suggestions? DTMF parameters I can tweak?
> 
> Here's an example of what Voicemail2 does when I hold down the "7" 
> key while listening to a message:
> (Flip-flop period is about 3-4 cycles per second.)
>    -- Playing 'vm-deleted'
>      -- Playing 'vm-undeleted'
>      -- Playing 'vm-deleted'
>      -- Playing 'vm-undeleted'
>      -- Playing 'vm-deleted'
>      -- Playing 'vm-undeleted'
>      -- Playing 'vm-deleted'
>      -- Playing 'vm-undeleted'
>      -- Playing 'vm-deleted'
>      -- Playing 'vm-undeleted'
> 
> 
> Thanks.
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-- 
Sample configs and more: http://www.fnords.org/~eric/asterisk/

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