Hello Harold, Yes, Parallel port COS/PTT/GPIO is supported with both chan_usb and chan_simpleusb! I have had tremendous success with this on my nodes. There is some related info on my web page, if you care to check it out. The article actually explains how to convert an IRLP node to Allstar, but it should answer some of your questions as well: http://www.qsl.net/k0kn/irlptoallstar.html Feel free to contact me off list if you'd like, I'm glad to help. 73 for now. Kyle K0KN Olathe, KS --- Original Message --- Hello all. Ive had my node running for some time now but finally got a chance to play with it and think of things to ask. Is there a way to use the serial or parallel port to key radios instead of a modded cm108 but still use it for the audio? Some of us I know have problems with spending so much money on a uri and hands are too shaky for surface mount soldering. If so, can someone point me in the right direction with this? Thanks Harold Kb7rsi Las Vegas NV.