Subj : Re: DTR Output on COM port To : borland.public.cpp.borlandcpp From : Bill Date : Tue Jul 26 2005 09:56 pm "> Can you tell me what I am doing wrong? One thing you're doing wrong is looking at DSR, which is an input :-) You might have better luck with pin 4 on a 9-pin connector, or pin 20 on a 25-pin connector. HTH, Bill .