Hi,
I just bought one of these too, although I only have little hardware experience I figured it was a cheap way to learn something.
My first problem is I can't seem to send anything to the phone. I have the serial console working and using pblq or kermit with a standard serial port on linux I can view kernel output, but thats as far as it goes.
I checked the serial port wiring, and thats Ok.
Could it be because I've not registered the phone yet?
I've not seen this documented anywhere else but if you press 1 (one)in the setup information page you get a list of all the driver versions and some other stuff email num/reg num/config http etc ....
Pressing 0 (zero) in the setup menu brings up something like phone numbers and hex? at the top of the screen
also from within the second menu (telephone line) pressing nine three times activates a toggle of some sort high/low beep.
All this done on an unregistered phone.
Mark.