GLOSSARY
A glossary that translates spec sheets.
Spec sheets full of abbreviations confuse for no reason. Here are sixteen terms you will meet, each in one sentence — and what it means for your system.
CCTV — a closed-circuit television system; surveillance where the picture goes to a recorder, not on air.
PoE / PoE+ — powering a camera through the same network cable that carries the picture. One cable, less installation.
NVR — a network recorder that stores footage from IP cameras. The heart of the system.
DVR — a digital recorder for analog cameras. An older standard, still in use.
VMS — software for managing surveillance: viewing, search and export of footage.
ONVIF — a common standard that lets one maker's camera work with another's recorder.
WDR — wide dynamic range; a camera that sees light and shadow at once, without white and black blobs.
IR range — how far a camera sees at night with infrared illumination.
LUX — a measure of light; how much light a camera needs for a usable picture.
H.265 / H.264 — footage compression formats. H.265 keeps the same quality on half the storage.
RG59 — a coaxial cable for analog systems. IP cameras use network cable.
IP66 / IK10 — protection classes: IP66 against water and dust, IK10 against impact and vandalism.
ANPR — automatic number-plate recognition, for parking and barriers.
RFID / NFC — contactless identification by card or phone for access control.
UPS — an uninterruptible power supply; keeps the system alive through a power cut.
Verification — checking an event on screen before calling; the difference between an alarm that sounds and one that protects.
Once you know the terms, the next step is camera count and storage.
Everything else is settled on site. The visit and assessment are free of charge.
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