I have a Z3812A that I added back in the GPS receiver and modified it (moving 6 zero ohm resistors) to work as a standalone GPS. Basically it's now a stand-alone Z3811. I have Lady Heather working with it now. The hack of using the RS-422 output to directly drive a RS-232 serial port does not work very well with most older RS-232 receiver chips. I have to control it with a USB-Serial cable. ------------------ If you are ever interested in playing with the Lucent boxes (Z3811, Z3812) I would be glad to send you a working system to play with. Sure would like to use LH with it.