[asterisk-users] DTMF Tones occuring randomly

[Eric "ManxPower" Wieling]

Stefan Agethen wrote:
> Hi Eric,
> 
> i have replied but nobody seems to got a deeper knowledge of the problem.
> 
> I have searched for talkoff, i found a lot of stuff, like check IRQs 
> (checked, and good) and/or set relaxdtmf=no (it is set)
> or check the dtmf modes to be the same or or.
> 
> But nothing of the things i found match to my problem except one thing i 
> cant understand - there is an thread at digium with the advice to use 
> the variable
> "dtmfthreshold" to set the level of dtmf detection, i cant find any 
> variable like this.
> 
> Do you know something where i can search ?
> 
> I got this problem since 6 or 7 months and tried MANY solutions to get 
> to my stable Asterisk, but i got no luck.
> 
> What do you think about switching from rfc2833 to inband to solve this 
> problem ?

What codec are you currently using for voice?

I have found that when nothing else works, playing with the gains on the 
Zap channel helped.  Usually lowering them.