Glossary Terms
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Router
A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. A data packet is typically forwarded from one router to...
Learn More >RS-485
A multipoint communications standard that supports several connections types and nodes per lines. It is uses two wires for communication between the DVR and Pan-Tilt-Zoom (PTZ) cameras. RS-485 is also known as...
Learn More >Sensor
Equipment that processes optical information (i.e. light) into electronic signals and renders it to be recorded or displayed on a monitor.
Learn More >Static IP Address
A number that is assigned to a device by an Internet service provider (ISP). A static IP address is permanently assigned and does not change.
Learn More >Subnet Mask
A 32-bit number that masks an IP address, and divides the IP address into network address and host address. It is used to identify network address of an IP address by performing...
Learn More >Substream
Low / standard resolution video for streaming to computers, smartphones, and tablets with remote access. A substream is used when the resolution or frame rate of the recorded video is too high...
Learn More >Television Lines (TVL)
The horizontal resolution produced by a camera. TVL is measured by taking a portion of an image's width equal to the height and counting the number of vertical lines displayed. Resolution...
Learn More >Transmitter
Equipment used to generate and transmit electromagnetic waves carrying messages or signals to a receiver (e.g., a wireless camera that sends video signals to a wireless receiver, which then outputs them to...
Learn More >Variable Bitrate (VBR)
Variable bitrate (VBR) is a term used in telecommunications and computing that refers to the bitrate used in sound or video encoding. As opposed to constant bitrate (CBR), VBR files vary the...
Learn More >Varifocal Lens
A varifocal lens is a lens that widen or narrow the Field of View (FOV) of a camera using screws or knobs. These camera allow for customization to specific environments and enable...
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