Local Area Network. A group of computers and associated devices that share a common communications line.
LED :vLight Emitting Diode.
Lens Mount :vThe area where a lens is mounted. There are two types; C- or CS-Mount.
Lens Speed :
Optical speed, expressed by f-number. Smaller f-number means faster lens.
An UNIX-like operating system. Very efficient and fast-performing system.
Line Lock modeLNB (Low Noise Block Converter) :
The part of satellite dish that hangs off of the arm and looks like a flashlight. It is what captures the digital signal from the satellite.
Lumens per Square Meter; unit of illumination amount.
License Plate Recognition (LPR) :
Software that has the ability to read and store license plates on cars. It has the ability to count cars and when applied with a sensor, it can capture images of speeding cars or red-light violating cars.
Loop Through :
A feature in CCTV that enables transmission of video from one device to another through cables. Only available on devices that feature Video In and Video Out.
This refers to the part of a video signal that carries the monochrome information. i.e. brightness information.
Latching Relay :
A relay that when set (either ON or OFF depending upon the relay configuration), locks into place until reset either manually or by a signal.
The abbreviation for Liquid Crystal Display.
The abbreviation for Light Emitting Diode.
Line Drop :
The drop in voltage along a power line caused by the resistance, reactance, and/or leakage in the line's wires.
Lock Relay Output :
A relay on the controller that changes its state upon command by the controller, locking or unlocking a secure door.
Creating and storing a permanent record of events that can be reviewed, printed, and analyzed.