asterisk users - Feb 2011 - Detect DTMF tone during call?

Hi,

I am attempting to create a intercom buzzer system using asterisk as a
back end. Most is figured out except the actual action of buzzing the
door. I need to detect whether a DTMF key was pressed by the the
called party (the resident). Is this possible to do using just a
dialplan? I can't see any options on the Dial command that would lead
to this, am I looking in the wrong place? I looked briefly through the
archive and I heard mentions of AGI, is this what must be used to
accomplish this?

Thanks,

Dan

On Sat, Feb 26, 2011 at 03:08:02AM -0600, Dan Saul
wrote:
>I am attempting to create a intercom buzzer system using asterisk as a
>back end. Most is figured out except the actual action of buzzing the
>door. I need to detect whether a DTMF key was pressed by the the
>called party (the resident). Is this possible to do using just a
>dialplan? I can't see any options on the Dial command that would lead
>to this, am I looking in the wrong place? I looked briefly through the
>archive and I heard mentions of AGI, is this what must be used to
>accomplish this?
If you want it to be detected within a call, which is what I'd assume,
you'll probably be looking at the applicationmap section within
features.conf.

http://www.voip-info.org/wiki/view/Asterisk+config+features.conf