I see.
You need installation instruction for GD-1200 but generally it is like this:
1. On the Fax PWA there are two pins named W1 and W2. For USA you have to connect W2 to the ground. Cable must be furnished with GD-1200.
2. Go to 08 mode (press 0 and 8 and power on the copier) set 701 code to 4 - USA and Canada. Turn off copier.
3. Go to 1* mode (press 1 and * and power on the copier) set 100 - start - initialize. Turn off copier.
I can be more specific if you invite me to California!
