re telephone on hook off hok in article aa insane apana org au peter m insane apana org au peter tryndoch writes mc aye there s the rub if you draw enough current to light an led th mc equipment at the phone company will think you ve gone off hook mc in the on hook state you re not supposed to draw current ok lets have some calculation here going by australian standards which i presume might be similar to other countries if not lets have some input a phone uses ohm to loop a v line ma a standard led drains ma so what is the actual loop current required for an off hook indication do you know up to microamperes on hook over something like ma off hook in between defective line and the phone company comes looking for leaky insulation michael a covington associate research scientist artificial intelligence programs mcovingt ai uga edu the university of georgia phone athens georgia u s a amateur radio n tmi
