Abstract: Printing and scanning methods using a facsimile machine communicating with a computer over a bi-directional direct passive link connected between digital communication ports of the computer and facsimile machine Upon receipt of an instruction at the facsimile machine, the printing method includes receiving digital image data from the computer via the bi-directional direct passive link. The digital image data is processed substantially as it is received at the facsimile machine and printed onto media. Upon receipt of an instruction at the facsimile machine, the scanning method includes scanning content from media provided within the facsimile machine to create digital image data digital image data representative of the content, and providing the digital image data substantially as it is created to the computer via the bi-directional direct passive link. The instructions and digital image data are transmitted in a standard facsimile machine format using standard facsimile machine protocols.

Abstract: Apparatus for interfacing a conventional facsimile machine with a PC enabling the use of the facsimile machine as a scanner or printer. A first switch assembly selectively couples the PC modem and facsimile machine either to independent telephone lines in a normal mode or to one another in a scan print mode. A manually operated switch assembly is depressed for a brief interval sufficient to activate a ringing circuit which converts DC power from a small battery source to a 20 Hz sine wave of 90 volt amplitude and applies the sine wave signal to the PC to cause the PC or facsimile to enter into a scan or print mode, respectively. The manually operable switch is then released to apply a constant current to the facsimile machine to simulate an off-hook condition.