[asterisk-users] DTMF over IAX

[Eric "ManxPower" Wieling]

Jason Walker wrote:
> Ok sorry for not being specific.  I am having a problem when people 
> outside call in to my number which terminates at VoicePluse then The 
> send IAX to me and I do not get any tones. People press buttons but it 
> just goes to the next dialplan fall through.  It happens 60-70% of the 
> time.

DTMF issues like this are caused by a problem where the PSTN call is 
converted to IAX.  There is nothing you can do about it unless you 
manage the box that converts PSTN to IAX.