What components make up a cctv system
- 1. What Components Make Up A CCTV System? Every CCTV system is comprised of cameras, a monitor and a recording device. These three components have their own separate functions. A camera is used to capture videos or still images which are recorded with a digital video recorder. These recorded videos or images can then be viewed with the help of a monitor. Depending upon the usage and area which needs to be covered a CCTV system may employ one or more cameras. In CCTV systems for strata the number of cameras installed will be more as they need to be placed at specific places for best coverage. You can choose to install either a wired CCTV system or wireless CCTV system. They both have their advantages and disadvantages. Cameras There are numerous kinds of CCTV cameras and each of them are built and designed for various purposes. There are a few criteria which determine the type of CCTV camera is needed. Placement of the camera is one such criterion. A camera which has to be placed outside will need to have a robust casing to withstand the outdoor conditions. Depending upon the range of area to be covered you may need to install cameras of different resolutions. A high resolution camera will be necessary to cover big spaces whereas a low resolution camera might be enough for a small room. There are cameras which can be hidden from normal view if you do not want people to know that they are being watched. You can also install PTZ cameras which can be remotely controlled. A PTZ camera has functions for panning, tilting and even zooming to focus. A CCTV system for strata may employ a lot of these different types of cameras. It all depends on the requirement of the strata. Cameras can be even connected to a computer network. There are two modes by which a camera may operate: wired and wireless. In a wired mode the camera transmits videos through a cable to the recording device whereas a wireless transmission occurs in wireless cameras. Wireless cameras reduce the installation cost and provide more flexibility but it is subjected to transmission failures. Recorders Recorders are mainly of two types; stand alone DVRs and NVRs. DVR stands for Digital Video Recorder and NVR stands for Network Video Recorder. Stand alone DVRs record and store the images or videos sent by the CCTV cameras. A stand alone DVR is not connected to any network but just a single computer system. NVRs perform the same function as standalone DVRs but are connected not to just a single computer but a whole network. The images or videos stored by NVRs can be viewed by anyone in the network. With NVRs it is easier to authorize who can view the videos or images over internet. Monitors Monitors are the screens which display the recorded images or videos to be seen by the security personnel. There are various kinds of monitors available: LCD monitors, LED monitors and TFT monitors. To view the feedback from more than one camera you may need to setup more than
- 2. one monitor. To deter thieves, some shops even position the monitors where they can be viewed by customers. By doing this, people entering the shops know that they are being watched and any undesirable incident may be avoided. As we can see that the basic components of CCTV system are typically cameras, a recording device and a monitor. The difference lies in the types of components used. Choosing from various types of cameras to installing the monitors and choosing which recorder to use is what constitutes different types of CCTV systems. It might be imperative to choose not one but many different types of cameras and installations in CCTV systems for strata . Choosing the right component and suitable installation is important as it will enable the security personnel to monitor the area better.