Browse Prior Art Database

Security and Control Adapters for Personal Computer Systems

IP.com Disclosure Number: IPCOM000110541D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25

Publishing Venue

IBM

Related People

Mallory, DA: AUTHOR [+3]

Abstract

Described is a hardware implementation of two security and control adapters (SCAs) for use with personal computer (PC) systems. One SCA is a high capacity adapter, and the other SCA is an ancillary adapter that provides limited functions. Continued

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 10% of the total text.

Security and Control Adapters for Personal Computer Systems

       Described is a hardware implementation of two security
and control adapters (SCAs) for use with personal computer (PC)
systems.  One SCA is a high capacity adapter, and the other SCA is an
ancillary adapter that provides limited functions. Continued

      The SCA for high capacity is designed to be an add-on type of
device to be used in non-dedicated mode of operations to control
access and security tasks, as required in areas such as retail
establishments, medical offices, warehouse or office facilities.  The
SCA requires one serial port for a minimal configuration.  From this
minimal configuration additional serial ports can be added to extend
to a network system supporting a plurality of system units, each
supporting a plurality of control adapters.

      The SCA is designed to support magnetic readers for access
control, both ingress and egress, and dual control access for media
centers, such as banks, drug storage areas, and other high security
applications.  Support is also supplied for reader/keypad
combinations for personal identification number (PIN) security
levels.  In addition, the use of contact sensing devices is also
supported, both in the supervised and unsupervised modes, for
applications from door sensing to high security monitoring under full
supervision for meeting Department of Defense (DOD) requirements.
The SCA contact sensing operation and operate times are adjustable to
meet many different applications and can be utilized together to
check the execution of the operate commands.

      Fig. 1 shows a basic block diagram configuration of the high
capacity SCA.  The various read stations and contact points are
connected to the SCA which is connected to the PC system.  Although
one type of station and points are shown, a plurality of each type of
station can exist in a system.  Power for all of the stations is
furnished by the SCA to eliminate the need for primary power at each
individual station.  A local control panel is furnished at the SCA to
provide operator control in the event of malfunctions.

      Fig. 2 shows a typical read station complex attached to the
SCA.  Magnetic head readers consisting of a read head and amplifier
send its output signal to the SCA in a specific format for data
separation and transmission.  An on-line indicator at the read
station informs the user when access is available at the read
station.  The indicator is extinguished when the system takes the
reader off line.  A strike-active indicator is used to inform the
user of a valid badge read enabling access to proceed through an
activated solenoid.

      In a typical operation, the user approaches the controlled door
and, if the on-line indicator is active, inserts the badge.  The
badge data is sent to the PC system through the SCA where the PC
system authorizes the access based on the badge data.  The access
signal is received by...