In message , Seyler Jean-Yves writes >My wish is to be able to phone (and why not speak ?) between 2 or 3 >local telephones without going "out" to the ordinary and public >telephone network. (In fact I wish my wife to call me for dinner when I >am in the attic, making electronics or PIC assembler :-) Turning off the electricity to the attic might be the best solution, pretty dificult to ignore... > >I thought of a pic that could monitor ringing and make the adequate >switches ... But perhaps, only some wiring could be enough ? > >Any idea, or already made application would be welcome :-))) IIRC Elektor Electronics had a design that was meant to interface to an 8052 BASIC board, but, from memory, the interface was just a bunch of relay drivers. This should be really easy to convert to a PIC. I can try and dig out the date/s of the article/s if this sounds interesting? > >Thanks >> -- Clint Sharp