Poe Cctv
January 25th, 2011
What is the difference between a “regular” Coax CCTV system vs POE CCTV system?
Any advantages, disadvantages, costs? Thanks!
CCTV cameras can be catagorized by how they are powered. the oldest type have separate DC power in and video out connectors. Then they started putting the DC voltage on the coax which became both the input and output for the camera, that was a one cable solution. i think this is what you are calling ‘regular’. POE means that the camera is digital output on an ethernet, but the ethernet is a special kind that also provides DC power. This makes the camera work similar to USB connected web cameras that get 5 volt power from the computer via USB cable. i have done only one POE installation, it was for a LAN connected microwave converter where the radio was located at the parabolic dish.
POE requires special equipment, to inject the DC on the cat5 cable. normal ethernet devices are not made to handle significant current on the wiring, if you have multiple cameras connected by a ethernet switch, that switch is a special kind that passes the operating voltage to all the connected cat5 cables.
imho, running a single RG59 to each CCTV camera position is a much simpler solution than networking.
Raytec releases video highlighting benefits of POE lighting for IP cameras
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CCTV $96.95 Closed circuit television (CCTV) is experiencing a leap in technology using digital techniques and the Internet. The new edition of this high-level professional reference retains the particulars that made the first edition a success, including the details of CCD cameras, lenses, coaxial cables, fiber-optics, and system design, but it is expanded to cover all video compression techniques used in the ever increasing assortment of digital video recorders (DVRs) available on the market today. It also serves to clarify the technology of data networking. The theoretical section explains the various compression techniques, such as MPEG-1, MPEG-2, JPEG, Wavelet, H.261/263, JPEG-2000, MPEG-4, etc. Networking is also a new and unknown area for many CCTV installers and this is explained in a brand new section. The challenge of selecting the right system from such a wide variety of new technologies available in CCTV has been compounded by the advent of DVRs. This new edition of the book CCTV demystifies DVR technology. -Covers brand new digital video recorder (DVR) compression techniques, image quality, measuring and networking -Fully illustrated with dozens of photographs, tables, checklists, charts, diagrams and instructions -Encompasses CCTV standards for U.S., Europe, and Australia |
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Categories: Uncategorized camera, cctv, cctv poe switch, ip, network, poe cctv, poe cctv housing, poe cctv megapixel, poe cctv system, video