| Word | Description |
| PAL | Phase Alternate Line Colour Video Signal standard for most of Europe, Australia and the Middle East - 625 Lines, 50Hz |
| Patch Panel | A panel that joins or terminates many different circuits |
| Photocell | A device used to detect changes in light level and provide an automatic switched output when lighting levels fall to a predetermined level |
| PIR | PIR is the abbreviation of “Passive Infra Red”, which is a motion sensor to detect heat from moving objects, such as human bodies and animals. When any motion is detected, P.I.R. will trigger the alarm system. The TV will show you what your cameras see. With P.I.R., you can always keep an eye on visitors at the front door, intruders in the garage, or any place within its detection coverage. With it, our products can detect moving objects within wider detection coverage to provide our customers optimum security and protection. |
| PSU | Power Supply Unit |
| PTZ | Pan Tilt and Zoom. A camera which can be controlled via Joystick or DVR and moved up/down, left/right and zoomed in/out. |