schriste@uceng.uc.edu (steven v christensen) (06/10/89)
A while ago someone posted a question for some kind of indicator to tell that another extention is in use. Someone suggested a battery and light on the other 2 wires of a phone line. Does anyone have a circuit which senses the voltage drop when someone picks up the phone? It would seem to me to be easier to do. Steven schriste@uceng.uc.edu