System and method of extending communications with the wiegand protocol
First Claim
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1. An access control security system comprising:
- a) a control panel;
b) a plurality of access control groups, each access control group interconnected to the control panel on an independent multi-wire data bus, each access control group comprising;
an access interface unit comprising;
data output means for transmitting data onto the data bus to the control panel, data input means for receiving data via the data bus from the control panel, processing means, interoperating with the data output means and the data input means, for operating data transfers over the data bus, the processing means adapted to generate a data message for transmission onto the data bus via the data output means, the data message comprising a Wiegand message field in accordance with the Wiegand protocol and an extended data field.
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Abstract
An extension of the industry standard Wiegand protocol for enabling two way extended communication, enhanced error detection, encryption, multiple reader capability, and enhanced information regarding the embedded data stream between a Wiegand device such as a card reader and a control panel on the existing 5-wire bus structure without requiring the modification to the existing infrastructure.
29 Citations
22 Claims
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1. An access control security system comprising:
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a) a control panel;
b) a plurality of access control groups, each access control group interconnected to the control panel on an independent multi-wire data bus, each access control group comprising;
an access interface unit comprising;
data output means for transmitting data onto the data bus to the control panel, data input means for receiving data via the data bus from the control panel, processing means, interoperating with the data output means and the data input means, for operating data transfers over the data bus, the processing means adapted to generate a data message for transmission onto the data bus via the data output means, the data message comprising a Wiegand message field in accordance with the Wiegand protocol and an extended data field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification