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can a wifi or wimax be used in a local area to build a CCTV network?
I would like to build a 30 camera CCTV network in my city and we use wifi / wimax repeaters to transmit video signals back to a base station ?
Does each repeater need it own computer or does it only need power ?
the problem is its every exspensive to run individual power and data cables hundreds of meters back to the base station for each cameraYes you can, we have built wireless systems reaching over 20 miles with over 50 cameras
Steps
--------- Wireless IP cameras transmit data/video just like computers on normal networks
- Repeaters require no computers, they simply pass on the data
- Build your wireless network
- Add your IP cameras to the network, each camera can be programmed at base via a direct connection to the network before deployment.
This can be done by connecting each IP camera to a PC and assigning an IP address. Usually, any software provided with the IP cameras can automatically detect and assign IP addresses to the cameras even when they are on the network.
- If you use wired IP cams, they will need to be connected to the wireless ethernet transmitter by cable. The transmitter will pass data to next repeater
- You can add analog/digital cameras by adding a video server that converts the video signal to TCP/IP signal and connects to transmitter via RJ45 ethernet
- Put your cameras up in the city, when powered on, they should automatically conenct to the network.
- dont forget to apply usual security settings on your wireless network, restricting by Mac address of each camera is a good idea also.
- If you need help or supply for long distance IP transmission, let us know
Hope this info helps. This has been applied in the City of Westminster, London, UK
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Article Referencing CCTV Cable
Copyright (c) 2008 Wes Fernley
In our previous article entitled "IP Cameras vs. CCTV Cameras - Part One," we discuss the advantages of Remote Viewing, Recording to Remote Locations, Wireless Functionality and Motion Detection with Video Analytics. This second article will discuss other advantages that IP cameras have over traditional CCTV cameras.
Compatibility
Most IP camera recording software supports a wide range of IP camera models and manufacturers. This allows you to mix and match IP cameras in your installation to create a custom surveillance solution that fits perfectly for you.
Let's say you wanted to setup three IP surveillance cameras, one viewing a parking lot, one watching your front lobby and another monitoring the rear entrance of your building. You could put three different IP camera models - even manufacturers - in this installation. You could go with an IQEye 755 5.0 MegaPixel IP Camera in the parking lot to monitor vehicles and provide a high quality image to zoom in on license plates. You could put a Wireless AXIS 207W with audio in the front lobby to minimize cabling requirements and to provide audio surveillance. Lastly, you can use a Sony SNC-RZ25N PTZ IP Camera with an outdoor enclosure to monitor the rear entrance and have the ability to pan/tilt/zoom the camera to needed areas.
All three IP cameras can be easily connected to the local network and configured within the IP camera recording software to monitor and record each individual camera.
BNC/Analog Output
Some IP cameras also come with a BNC/Analog output allowing you to connect the camera to your existing CCTV system. This would allow you to connect the IP camera to your DVR recording station and still have a network connection attached allowing for remote viewing and recording to a PC or offsite location. Be sure to verify the IP camera has the ability to send video to both the BNC/Analog output and through the network simultaneously.
PoE Power over Ethernet
Power over Ethernet (PoE) is the ability to power your IP camera and provide network activity via one RJ45 network cable. This provides an easier installation and lower cable installation costs as this eliminates the need for a power cable to be connected to the camera. To take advantage of this technology, make sure your IP camera is PoE compliant. A PoE network router/hub or Midspan will be required to provide power to the camera via the RJ45 network cable. PoE kits are also available which provide power via network cable when you do not have a Midspan or router/hub. One PoE kit will be required per camera and will need to output the correct power requirements (5V, 9V, 12V, etc.).
I/O for Card Readers, Alarms, etc.
IP cameras can easily be added to existing security including card readers, alarms, glass breakers, access control, etc.. The IP camera can be set to receive an input from these devices which can then tell the camera to record video when a specific event is triggered. Outputs can also be set where if the IP camera detects motion, a signal is sent to the alarm to create an audio siren or alert.
Conclusion
We hope Part One and Part Two of "IP Cameras vs. CCTV Cameras" has educated you in the advantages of IP over CCTV. It is best to know what options exists for you before making a purchase so you can effectively monitor your home or business.
About the Author:
http://www.networkwebcams.com specializes in IP Cameras, Network Cameras, Internet Cameras, Video Servers and Networked CCTV Recording Software. The directors of Network Webcams have been in the network video industry since it first appeared around 1996/97. Their knowledgeable staff can help you find the right IP surveillance product or platform to meet your needs.
Article Source: ArticlesBase.com - Ip Cameras Vs. Cctv Cameras Part Two
Published on December 14, 2004 · Filed under: Electronic Equipment; Tagged as: bnc, cable, cctv, cctv cable connectors, cctv cable distance, cctv cable guide, cctv cable length, cctv cable power, cctv cable tester, cctv cable w power and data, cctv cable with power, cctv cables, cctv cables and connectors, coaxial, video
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