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management switch – A device that monitors the system's main processing
node (main CPU). Upon detecting a failure, the management switch
directs the redundant CPU to take control of the system.
MCPU – See main CPU.
monitor – A CRT (cathode ray tube) dedicated to viewing images generated
by one or more of the components of a surveillance system.
network security system (NSS) – Large-scale matrix system that performs
functions such as camera control, switching, automatic alarm
processing, and provision of an on-screen display.
operator – A person (operator) who accesses the system, selects resources,
and controls selected system resources.
operator identification number – A decimal number that uniquely identifies
an operator to the system; a user will use this number when logging
onto the system.
operator password – A unique decimal number that must be presented along
with an operator's ID number each time he or she logs onto the
system.
redundant CPU – A central processing unit in the "standby" mode, always
ready to take control of the entire system upon command from the
CPU management switch. After taking control of the system, the
redundant CPU becomes the active CPU.
RS-485 controller – A system controller that communicates via an RS-485
physical layer interface.
RS-485 interface – A specialized interface common in the world of data
acquisition. Capable of supporting 32 drivers and 32 receivers
engaging in bi-directional, half duplex, multi-drop communications
over a single twisted pair. The differential voltage transmission
system enables a maximum cable length of 4,000 feet.
spot – Usually means the same as "camera spot."
system administrator – A person who manages a network system by
configuring system hardware, programming system features,
monitoring system status, controlling overall system operation, and
reviewing system logs.
system controller (controller) - A device that controls a WJ-SX850 system.
Typically, a system controller is an input/output device operating by
itself, or by a user. Any device that conforms to the system
controller interface specifications can be a system controller.
system resources – Objects such as monitors, cameras, alarms, alarm outputs,
etc. Most system resources are available for direct control by a user.
Also, configured memory available for performing various tasks
within a PC operating system.
Glossary
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