What interface cable options are available for the HL-3450CN?
The interface cable is not a standard accessory and must be purchased separately. Available options include Parallel, USB, or Network interfaces. Most existing parallel cables support bi-directional communication, but some might have an incompatible pin assignment or may not be IEEE 1284 compliant.
From the official Brother HL-3450CN Color Laser Printer manual, page 1
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