3800 HD (250-3533) Adding a Serial Device Faxback Doc. # 1436 You can connect a serial mouse (25-2001), fax/modem (25-3532), or other serial device to your computer's built-in serial port. 1. Prepare the serial device according to its user's guide. 2. Turn off the computer. Then, pull down the cover on the back of the computer. 3. Connect the DB-9 serial cable connector to the SERIAL port. NOTE: Be sure that you use the screw mounts on the port to secure the device's cable. 4. Turn on the computer. (jej-05/10/94)