On Sun, Apr 26, 2009 at 11:41 PM, Bob Blick wrote: > And I am suggesting you check to see if your telephone wiring has four > wires, in which case two of them are available to use for a 1-wire > network with PICs. A 1-wire network needs two wires. What if all 4 wires are used? What are the other 2 wires used for anyway? I need a way to modulate the signal over the line so I don't cause disturbance. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist