Canon plain-paper Fax-L770 Canon U.S.A., Inc., introduced the FAX-L770 plain-paper laser beam facsimile, employing the company's Laser Beam Printer (LBP) technology. The FAX-L770 features an enhanced version of Canon's UHQ technology; high-resolution hyper-smoothing that delivers an image quality close to the original; an exclusive all-in-one one compact replaceable cartridge system that increases reliability and maintains optimum copy quality; and an optional RS-232C port that integrates computer and fax functions. Canon FAX-L770 transmits a lettersized document in just nine seconds and has a high-speed printing capability of four pages per minute. Boasting a high resolution of 200 x 400 dpi in the Super Fine mode, the FAX-L770 scans and transmits text, illustrations, and photographs in up to 64 shades of gray. An Edge Enhancement feature in UHQ eliminates the fuzzy look often appearing on transmitted text, graphics, and illustrations, and its Error Diffusion Method provides more depth and clarity of halftones. Canon's patented Hypersmoothing process uses a custom-designed LSI (Large-Scale Integrated) circuit to adjust incoming documents images by filling in rough images and text for a more solid look. Due to Canon's laser technology, the FAX-L770 incorporates newly-designed parts that result in an ultra-compact high-performance facsimile. The replaceable cartridge unit includes the drum, toner, and developer which can be replaced simply and quickly. A lensless contact image sensor scanning system increases sensitivity by directly reading the original for better image quality. The absence of internal mirrors traditionally used to scan materials and Canon's compact LBP engine found in its latest laser beam printer result in an ultra-compact design. The Canon FAX-L770 has Automatic Speed Dialing for up to 172 different fax numbers, including 100 coded speed-dial numbers and 72 one-touch speed-dial numbers. Missing tray prong doesn't affect operation.