I am affraid Borislav is right, and that serial handshaking leads are indeed shared with headlight sense and mute inputs (presumably due to docking connector limitations), so one has to choose which one wants to use. In normal operation (say, if you want just to plug a terminal when in car) this is not a problem since empeg comm software only uses 3-wire serial (provided that your device and empeg share the ground :)

I think this was covered previously here.

Cheers!

Dragi "Bonzi" Raos
Zagreb, Croatia
Q#5196, MkII#80000376, 18GB green