Samsung SF-5100 20 sheet auto document feed 150 sheet paper supply 10 one touch speed dials 80 two touch speed dials Alpha dial 160 page out of paper receive 6 seconds average transmission speed Enlargement/reduction Multi-copy Collation facility 6 page per minute printing 3 second quick scan Junk mail blocking facility Dims: (W)375 x (D)227 x (H)325mm Weight: 7 kg Average cost per copy 1.56p Supplied with starter drum toner kit for approx 1000 pages Samsung SF-515 20 sheet auto document feed 150 sheet paper supply  10 one touch speed dials 80 two touch speed dials 40 page out of paper receive 89 broadcast locations Polling Dual access operation 14,400bps modem speed Up to 6 seconds average transmission speed Up to 99 copies Multi-copying with sorting Enlargement/reduction 8 page per minute printing 64 grey scales Remote diagnostics Delayed send Toner save Power save Dims: (W)313 x (D)325 x (H)228mm Weight: 6 kg   Samsung SF-6800 Corporate plain paper fax 50 sheet auto document feed 250 sheet paper supply (upgradeable) Flatbed straight paper path 20 one touch speed dials 150 two touch speed dials 400 page out of paper receive 193 broadcast locations 14,400 modem speed 6 seconds average transmission speed Personal copy mode Multi-copying with sorting Enlargement/reduction 8ppm mono printing Remote diagnostics for low toner - automatically informs the dealer by fax when a users toner is low Hardware toner sensor, measures actual toner level 256 grey scales 3 seconds quick scan 7 days battery back-up 8,000 page yield maximum per month Dims: (W)386 x (D)405 x (H)270mm Weight: 14 kg Average cost per copy 1p Supplied with a drum & toner cartridge for up to 8,000 copies Samsung SF-835P 50 sheet auto document feed 550 sheet paper supply 50 one touch speed dials 200 two touch speed dials 800 page out of paper receive 33,600 bps modem speed 3 seconds average transmission speed Up to 99 copies Enlargement/reduction 12 page per minute copying 600 x 600 dpi print quality 300 x 300 dpi scan quality 1.5 seconds quick scan 256 grey scales Dims: (W)540 x (D)449.5 x (H)393mm Weight: 19 kg Average cost per copy 0.97p Supplied with full toner & drum Optionally achieve dual line communication which allows two telephone lines to one fax  480 page out of paper receive 1200 dpi print resolution 12 page per minute printing PCL6 print language USB and Parallel interface Windows 95, 98, 2000, Me, NT, XP Dual line option does not apply to this machine