Computer communications control

Details Computer communications control Computer communications control

1982-01-29

1984-10-02

Smith, Jerry

Boots, shoes, and leggings

178 2208, 178 2209, G06F 300, H04L 900

Patent

active

044751753

ABSTRACT:
A secure communication link is provided for transmitting signals between a host computer and at least one authorized terminal. The communication link includes a host modem for modulating and demodulating the signals transmitted between the host computer and the authorized terminal and an access controller. The access controller stores enquiry and reply sequences of bits and is operable to compare incoming signals from the host modem with the stored sequences of bits. Where there is agreement between the signals from the host modem and the stored sequences of bits, the controller establishes the communication link. Where there is no agreement or no reply from the host modem, the controller disconnects the host modem from the link.

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