[Asterisk-Users] asterisk + door opener

[Thomas Artner]

Hi!

I am new to asterisk and I'd like to know wheter the following scenario
is possible:

Someone press the Button on the door station.
The door station dials lets say the extension 333.
I  take the call on 333 and talk with the person on the door.

Now I'd like to activate the door opener by pressing some numbers on the
analog telefon.
Asterisk should now recognize that I pressed something to open the door
and should execute a script which opens the door.

My question is, is it possible to execute a script while i am talking
with the person on the door, without hanging up before?

Can anyone give me some hints where to start looking in the docu?!
I only need to know how to execute a script when I press - lets say the
* Button while i am talking.

Opening the door with a bash script is already working.

Thx very much in advance!

Tom