Pins 24 Print Speed ( cps) 480cps ( High Speed Draft 10cpi) Input Buffer 128KB Paper Handling Pull tractor unit: Optional Roll paper holder: Optional Paper Path Manual Insertion ( Front or rear in, top out) , Push Tractor ( Front or rear in, top out) , Pull Tractor ( Front or rear or bottom in, top out) Interfaces Bi-directional parallel interface ( IEEE-1284 nibble mode supported) , USB 2.0 ( Full Speed) , Type B I/ F level 2 ( Option) MTBF ( hrs at 25% duty cycle) 20000 POH ( 25% Duty) Copy Capability Original + 5 copies Black Ribbon Life ( million characters) approx. 8 million characters Colour Ribbon Life ( million characters) NA