"Executives have no idea how sensitive facsimile transmitters are and how easily they can be intercepted," said David Day, executive director of the International Facsimile Association.

Their system employed a modified, Alexander Muirhead designed, rotating drum, facsimile transmitter, and Larkby & Pyatt's own, unique, design of hard-copy printer.

In a facsimile transmitter, a device that changes the signal modulation from amplitude modulation (AM) to frequency-shift keying (FSK).

Required to perform basic duties, e.g. type from copy, proofread own material, compose routine correspondence, maintain simple files, records and statistics, operate standard office equipment, such as calculators, photocopiers, telex machines, facsimile transmitters.