Don,> Isn't it easier just to use a SIP door phone?Not in my case. The purpose of the whole exercise is to turn it into a DIY project and hopefully, train a bunch of kids how to tinker with RaspberryPi, Linux and Asterisk. Therefore, my objective is not to "give a fish", but to "teach how to fish" and make them able to see the fun in it :-) Ish,> You could create your own feature in features.conf that executes a > Macro/Gosub defined in sip.conf...Hmmm, I have never dealt with customized features.conf in the past, so I will look into that direction. So far, my approach is to leverage what I already know - and that is to simply transfer the call to a specific extension; which, in turn - will call System() in order to send a command to the electro-magnet that keeps the door locked. The downside is that one would have to press #5 (assuming that 5 is that "magic" extension for opening the door), rather than just #. Alex