System for limiting access to security system program
First Claim
1. Apparatus for limiting programming access in a security system which provides selective access at plural remote locations based on stored data in response to data on an encoded card, comprising:
- a first plurality of data encoded cards identifying a first plurality of personnel;
a second data encoded card identifying a second person;
means for selectively providing access to each of said plural remote locations, said means comprising;
data storage means defining which of said first plurality of cards shall permit access to which of said plural remote locations; and
means for reading data encoded on said first plurality of cards, for comparing said data with said data storage means, and for providing selective access based upon said comparison; and
means permitting alteration of said data storage means in response to said second data encoded card.
5 Assignments
0 Petitions
Accused Products
Abstract
A security system in which access at remote locations is limited to personnel inserting in the system a coded data card, the data of which compares favorably with data stored in a memory. The memory data comprises a table which permits access to selected terminals by selected personnel at selected times. Programming access to the system for the purpose of altering data in the access authorization table is limited to individuals who insert a supervisor'"'"'s card into the system, which card enables the logic required for altering the authorization table.
71 Citations
13 Claims
-
1. Apparatus for limiting programming access in a security system which provides selective access at plural remote locations based on stored data in response to data on an encoded card, comprising:
-
a first plurality of data encoded cards identifying a first plurality of personnel; a second data encoded card identifying a second person; means for selectively providing access to each of said plural remote locations, said means comprising; data storage means defining which of said first plurality of cards shall permit access to which of said plural remote locations; and means for reading data encoded on said first plurality of cards, for comparing said data with said data storage means, and for providing selective access based upon said comparison; and means permitting alteration of said data storage means in response to said second data encoded card. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. Apparatus for limiting programming access in an encoded data card security system, comprising:
-
a read and write memory storing data defining which of plural persons will be permitted access at a secured location; means for reading a magnetically encoded data card and for comparing data on said card with stored data to provide an authorization signal; and means responsive to said authorization signal for permitting alteration of said read and write memory. - View Dependent Claims (8, 9, 10, 11)
-
-
12. A method of controlling access to a read and write memory in a security system, said read and write memory storing data specifying which of plural personnel will be provided access at plural remote locations, comprising:
-
reading data from a magnetically encoded data card to provide an identification signal; reading data from a storage buffer to provide an authorization signal; comparing said identification signal with said authorization signal to provide an access signal; and controlling operation of a circuit used for writing data into said read and write memory in response to said access signal. - View Dependent Claims (13)
-
Specification