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  • Modal Dispersion


    Modal Dispersion : A broadening of a waveform over long distances. Modal Dispersion (or Inter-modal Dispersion) occurs in multi-mode fibers, because light is bounced down different reflective paths (e.g. modes) in the fiber. As the distance increases, the path (mode) begins to spread and the arrival time for the different light rays begins to vary. A large variance (dispersion) increases the chance that the optical receiver may interpret the incoming signals incorrectly. Modal dispersion is a major problem with multi-mode fibers.

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  • BLC


      Backlight compensation (BLC) is a feature on security cameras that compensates for strong background lighting, which would normally drown out features in the foreground, and makes details in the foreground visible.

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  • Different types of cameras


      CCTV : Closed circuit television utilizes video security cameras to capture and transmit video feeds to a central location on a specific number of monitors. HD CCTV : Also known as HD-SDI, High Definition Closed Circuit Television is an industry standard for transmitting uncompressed HD video (up to 1080p) over coaxial cable which allows for IP quality video over an analog infrastructure. Dome Camera : A type of camera that is known for its dome-like shape and one of the most commonly used security Camera types. Their sleek, inconspicuous profile makes dome cameras an ideal camera for discrete video surve

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  • DVR & NVR


      DVR : Digital video recorders capture and store video feeds produced by analog security cameras onto a hard drive. DVRs come in two types, standalone units similar to your cable box and PC-based towers that are specifically built computers with a DVR card to convert the video signal into data to be stored on a hard drive. NVR : Network video recorders capture and store video feeds produced by network IP cameras. Most NVRs come with software which allows immense versatility through a variety of features that can be used to automate aspects of your security operations. NVRs come in standalone units and PC based v

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  • Multimode Fiber


      An optical fiber with a larger core (typically 50 or 62.5 microns) than singlemode fiber. The core is made of plastic or glass fibers. It is the most commonly used fiber for cabling short distances as used in LANs. The name multimode comes from the fact that light rays travel down multiple reflective paths (modes) within the fiber. This allows light to enter the core at different angles, making it easier to connect to broader light sources such as LEDs (light emitting diodes). Fiber optic interfaces and multimode fiber-based transmission systems are less expensive than those based on singlemode fiber. However, the

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  • ONVIF, Optical Zoom, OSD


    ONVIF This is a global and open industry forum and standard aimed at facilitating the development and use of an interface of IP-based security products. All ONVIF products are compatible with each other irrespective of the manufacturer’s brand.   Optical Zoom This is a true mechanical zoom, which allows a camera to enlarge objects at great distance. It allows one to change the focal length of a camera by adjusting the physical zoom lens. Unlike digital zoom, optical zoom does not suffer from pixilation, but it cannot be performed on video playback via the video recorder’s software. Optical zoom provid

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  • MPEG 4


      MPEG stands for Motion Picture Experts Group. This is an ISO group of experts that recommends the manipulation of digital motion images. The most common recommendations are MPEG-1 and MPEG-2. MPEG-4 is a further development of MPEG-2. MPEG-4 is a method of defining compression of audio and visual (AV) digital data. It is designed for transmitting AV data at very low transfer rates over the internet. It is a digital video encoding and compression standard that utilises inter frame encoding to significantly reduce the size of the video stream being transmitted. With inter frame coding, a video sequence is made up of

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      LAN: LAN, also known as Local Area Network,is a communications network that serves users within a limited geographical area, for example a building or a university campus. It is controlled by a network operating system and uses a transfer protocol. WAN: WAN, Wide Area Network, is a long distance link used to extend and connect remotely-located LANs (local area networks.) RAID: RAID is short for Redundant Array of Independent Disks. It is used to organize two or more hard disks in a manner as though they were one. The data is shared or replicated in such a disk and used to achieve greater capacity, reliability

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  • RS232, RS422 and RS485.


     RS232, RS422 and RS485 are the recommended standards for digital communication. They serve as communication interface between computers, CCTV cameras, DVR/NVR, keyboards and other peripherals. They are called as an serial communication interface.   RS232 - In telecommunications, RS-232 is a standard for serial communication transmission of data. It formally defines the signals connecting between a DTE (data terminal equipment) such as a computer terminal, and a DCE (data circuit-terminating equipment or data communication equipment), such as a modem.It is a 3 wire unblanced line and used

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  • Ethernet


      It is the most commonly used local area network (LAN) access method. Ethernet complies with the IEEE 802.3 standard. The Ethernet standard supports 10 Mbps, 100 Mbps, 1000 Mbps, and 10 Gb (Gigabit) data transmission rates.​ IEEE stands for the Institute of Electrical and Electronics Engineers, the world's leading professional association for the advancement of technology. IEEE 802.1x The IEEE 802.1x standard provides a general method for authentication and authorization in IEEE-802 networks. Authentication is carried out via the authenticator, which checks the transmitted authentication information using an

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