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Remote Card-Operated Terminal Disclosure Number: IPCOM000063794D
Original Publication Date: 1985-Apr-01
Included in the Prior Art Database: 2005-Feb-18

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Powell, KE Watkins, HE [+details]


This article describes an arrangement which allows virtually unlimited distance between a card reader and its host CPU. Magnetic stripe readers and like devices utilize dedicated, direct current, copper lines for communications with a host CPU. This arrangement limits the distance the reader or like device can be physically located from the host CPU. In addition to the limitation placed on the system by loop resistance, performance is further impaired by the rapid roll-off at higher frequencies as badge or card insertion speed is increased by the user. The reader or like device normally utilized in applications of this type is a manually operated device resulting in the output frequency or output data rate being proportional to the insertion rate.