Security and surveillance systems have taken massive steps by enhancing the new computer based technologies. We now have powerful surveillance that is easy to manage at an affordable price. There are many aspects of home security systems and surveillance that are shared with business security or commercial property surveillance. A home security system is usually a deterrent to would be intruders and a means of assisting police should a burglary take place. In some areas an insurance company may insist on some form of electronic surveillance and electronic alarm system. In a business environment the electronic security system will go beyond the simple goals of a domestic security system. Casino security, is for example, very different from bank security or the security provided to users on the rail networks. Each industry has some unique requirements which must be met.

In its simplest form a security system relays the images caught on camera from one location and displays the image on a display device in a second location. This is where the original acronym CCTV (closed circuit television) originated. Many folk still refer to modern security systems as CCTV systems and who am I to argue. In truth however, the modern systems are computer driven with CCTV security camera surveillance equipment attached to a wired or wireless computer network. The computer technology could be packaged into a standalone DVR with 1 or more cameras attached. An entry level system would therefore comprise of a single channel DVR with a single security camera attached with a supplied cable. A simple variation of this system would be the DVR security recorder attached to a network camera using standard computer (Ethernet) category-5 cabling. Moving forward and you can select a multi-channel DVR which allow multiple cameras to be attached. An alternative at each stage is to utilise a PC or computer system with a single channel or multi-channel card installed. The range of Geovision data capture cards are each a multi-channel video surveillance card installed into a PC allowing different numbers of connected channels. The greater the number of channels then the greater the number of frames or images that need to be recorded and the processing power on board needs to be increased.

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