Method and apparatus for networked access control

Electrical computers and digital processing systems: multicomput – Computer network managing – Computer network monitoring

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709223, 709224, 709228, 709217, 709220, 709222, 709240, 395750, 326 30, 34082531, 34082534, 713300, 700276, G06F 126

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061579521

ABSTRACT:
An access control device controller and method of operation are provided which provide in a first aspect of the invention, a novel way in which to set controller network addresses providing a visually perceivable digital readout to assist installers in setting the correct address, in a second aspect of the invention, automatic configuration of end of line termination resistors, line biasing resistors and earth ground connection to the network medium shield, in a third aspect of the invention, automatic configuration of a controller/host computer data communications link, in a fourth aspect of the invention, a novel method and apparatus for monitoring ambient RF noise levels, and in a fifth aspect of the invention, a novel method of detecting environmental conditions likely to lead to a system failure.

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"microID.TM. 125 kHz Design Guide-Using the microID.TM. Programmer", 1998, Microchip Technology, Inc., pp. 117-124.
CASIO 587 590 593.

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