Carlos: What about using RS232 in a multi-drop or star configuration? I though RS232 was point-to-point. --John > My question is: is my impression of RS232 unfounded? If so, why? Has > anyone used RS485 in the way I want to use it? If so, did you use a > terminating resistor as each node to minimize reflections? Any other > information you could provide would be very helpful > > Regards, > > --John You can use the RS232 for long distance but you have to make an amplifier to use it without problems. I saw one circit sometime, that could use the RS232 in a ddistance of 100m from the computer. Maybe, if you are intereted in this circuit, I can search it and send you. Carlos L.M.