my ISDN pabx has finally "almost" died. So I am now seriously considering to swap all over to the Asterisk implementation of LMCE. However, there is still one small problem; i've got a door unit which passes on a press on one of the buttons to the pabx which in its turn will rings the phones in the house with a specific ring interval.
Now my question: What can be arranged re implement my doorsystem but now based on LMCE and without costing a fortune (I think 300 euro for a doorbell is a fortune). Maybe you can tell what and how you use it, so I can learn from that.
I have got a door unit with button and a whole printboard turning it into a "xyz" protocol on a little flatcable that is hooked up to the pabx. Reuse is possible. I am still trying to find the protocol it uses.