Technical Dictionary

P2P, or Peer-to-Peer, is a network architecture in which each participant on the network has equal status and acts as both client and server. In a P2P system, each user has the ability to transmit and receive data without a central server. P2P architecture is used in various types of applications and services.

PAL (Phase Alternating Line) – an analogue television video broadcast system. The system was created as an improvement of NTSC standard for use in Europe, Africa and several Asian countries.

Vpp (peak-to-peak voltage) is a peak-to-peak voltage. A parameter measured between the maximum signal amplitude value and its minimum value over a single period.

Pelco-D/P are two, relatively similar communication protocols for motorized CCTV cameras.

PET - Polyethylene terephthalate is a semi-crystalline, high-strength and high-ductility polymer with excellent machinability and UV resistance properties, good electrical insulation and sound attenuation properties.

Production technology of the coaxial cable insulation

Ping – a common name for a mechanism testing the computer network; it uses a basic working principle similar to echolocation (to ping - means to use the ping mechanism).

PoE IEEE 802.3af – a data and power transmission standard over a single twisted pair cable. The required power must not exceed 12.95 W. Guaranteed minimum distance is 100 m.

PoE IEEE 802.3af – a data and power transmission standard over a single twisted pair cable for devices with power input up to 25,5 W with a guaranteed minimum distance of 100 m.

A polymer fuse is a reusable electronic element used to protect a circuit from the effects of short circuits and overloads. These elements have a very wide range of applications in electronics.

Power over Coaxial (PoC) is a technology that supports simultaneous transmission of power, high-resolution analogue video signal and OSD control signal over coaxial cable at the distance of up to 400 m.

Current efficiency of the power supply is the maximum current the power supply should supply to the load, while maintaining all the parameters specified in the data sheet (output voltage, power etc.) and operating within the operating conditions (temperature, humidity etc.).

A parameter defining the ability of a power supply to feed the connected devices with a required power expressed in watts (W) or volt-amperes (VA).

A power transmission distance is the maximum length of a power transmission line in which the voltage drop at the cable does not affect the operation of a supplied device.

The range of an IR illuminator depends on the type of illuminated surfaces and type of illuminated objects.

A parameter defining the image size expressed as a product of the number of horizontal and vertical pixels, e.g. 1024x768. The parameter applies to all the display devices, e.g. monitors, displays as well as recording devices, e.g. photo cameras, video cameras and different types of recorders.

A type 45 Registered Jack – an 8-pin connector used as a port in most network devices, e.g. modems, routers, network adapters, patch panels or IP cameras. RJ45 connector is crimped on a twisted pair cable (8-conductor data communication cable) and a flat telephone cable as a termination.

ROI (Region of Interest) allows to compress a region selected from image to maintain the highest possible quality. It reduces bandwidth use and storage capacity required, and also reduces the risk of losing critical image data (due to high compression).

A data transmission standard using a two-conductor cable.

The RTP protocol, or Real-time Transport Protocol, is a protocol for transmitting real-time media streams over IP networks. RTP enables the efficient transmission of real-time audio and video data, while maintaining some flexibility in the area of encoding and decoding.

Real Time Streaming Protocol (RTSP) is a communications protocol used to control real-time streaming of data. It is often used in video and audio transmission systems, such as video surveillance, Web TV, teleconferencing and other applications requiring real-time multimedia data.

SATA (Serial Advanced Technology Attachment) – is a serial computer bus interface developed by Serial ATA International Organization, intended for communication of mass storage devices, i.e. hard disk drives or optical drives in PCs, CCTV recorders etc.

A system can be classified into four grades. Grade 1 – the lowest risk of burglary and robbery, Grade 2 – for installations with low or medium risk, Grade 3 – for installations with medium or high risk, Grade 4 – for installations with high risk of burglary and robbery.

Sense Up – is a function extending the light measurement time by the camera sensor at low lighting conditions. The light is adjusted with an electronic shutter. With incorrect settings, any moving objects in the image may be blurred.

SNR is the power ratio between the signal strength and the noise level in a specific band.

A parameter defining the number of photosensitive elements (pixels) in an image sensor of each video camera or digital camera. The matrix size of the image sensor is given in megapixels (Mpx) and corresponds to the size of the image created by the device.

Sound intensity level is a sound “loudness” level measured in decibels. It is measured with a sound level meter (decibel meter).

Voltage frequency – a parameter defining the number of periods for alternating voltage waveform expressed in hertz (Hz). In Poland it is 50 Hz at 230 V.

A parameter defining how many hard disk drives and a total capacity that can be connected to the dash cam. Hard disk drive capacity determines the available recording time.

The designers of power supplies use different methods to prevent short circuits and overloads. The protection should guarantee safety of both the power supply and the load.

Devices converting the mains voltage (alternating voltage) to constant voltage, with the process taking place on a switching regulator including a quick keying system with switching transistors and a high-frequency transformer.

A tamper contact indicates if the device cover is open or closed and is often used in burglary and robbery alarms and restricted access systems. The tamper contact is marked as TMP tamper in the diagrams, instructions and directly on the devices.

TBW (Total Bytes Written) - is a parameter that determines the total possible amount of data that can be written to solid-state drives, including drives or memory cards, over their lifetime.

Transmission Control Protocol / Internet Protocol – A suite of network protocols used in the Internet to connect different computers, operating systems and software in a single network.

Telcordia SR-332 is a model to calculate (predict) the MTBF parameter, which was developed in the telecommunications industry for the purpose of estimating the reliability of equipment in the industry.

ONVIF aims to standardize the communication protocol of monitoring devices in the IP systems.

The Delta-Opti company test, allows you to easily compare illuminators of the same power.