Ok, I didn't think to look at the bottom for notes. My next dumb question, for the COS, what is it triggered by? Looking at the diode, keep in mind I'm no expert at electronics, I would think it's triggered by ground. Ground goes on the cathode side right? But testing the connections on my adapter from dealextreme, it has volume buttons, it connects that pin to aprox 3.3v. Is this I/O pin capable of either one? Or am I just really that confused? On my radio I hace ground output for COS or aprox. +5v for CTCSS. I'd rather use the COS if the software can decode and encode the CTCSS for me. Also, does the software support multiple CTCSS tones like a community tone panel? Could I maybe configure multiple nodes (with different tones) and set them to the same usb device? It would be useful for giving groups their own tone, then if I had a problem I could disable that group. Thanks, Jeff