For many years analog CCTV camera systems were deployed utilizing RG59/U coaxial cable to connect a CCTV camera to a Digital video recorder. The coaxial cable was run in a homerun fashion between the camera and the recording station as distance up to and in some case exceeding 1000 feet. In addition to the coaxial cable needed many cameras deployed required the a low voltage power cable, typically 18/2 to send camera voltage from a low voltage power supply located in the recording station or a mid-span location depending on the overall cable distance and power requirements of the connected cameras. A third wire either a UTP or STP data cable would be required for Pan-Tilt-Zoom operation. As Shown in Example 1.
Today, the acceptance of IP cameras are rapidly becoming the norm and their deployment is greatly increasing. One of the biggest hurdles we face with IP camera installation is the cost associated with infrastructure to support such technology. As discussed in example 1 above, many cameras previously installed have coaxial cable connecting the devices up to and sometimes exceeding 1000 feet. With the deployment of new IP camera technology comes new challenges. First, the cabling intended for the installation of IP cameras is a category rated UTP cable i.e. Cat5e not our traditional coaxial RG59/U presently installed. The EIA/TIA networking standards limit the maximum cable distance between devices to 100 meters. One of the biggest barriers we face in converting an existing analog site to IP is the cost associated with abating the coaxial cable while installing new category rated UTP cable and meeting the networking standards for distance and terminations. Further, many sites must simply use the existing cable, such as hospitals where cables are ran behind walls and occupy the same space as oxygen lines and nurse calls. Older buildings which may contain asbestos and/or lead paint. Outdoor installations where cable distance exceed 100 meters and/or aerial or direct burial cable can no longer be routed due to construction obstructions. There are millions of miles of existing coax connecting hundreds of thousands of devices through decades of legacy installations and luckily there are products which allow us to install new technology on this legacy cable as you can see in Example 2.
As shown in Example 2, the same RG59U coaxial cable that was used in Example 1 was also used to upgrade the legacy analog camera to a megapixel IP camera. To do this we must attached the BNC connector of the existing coaxial cable to the BNC connectors of the IP Over Coax transmitter and receiver. RJ45 Patch cables will be needed to connect the transmitter and receiver to the camera and network (PoE) switch. The IP Over Coax receiver gains it power from the PoE switch and send it over the coax to apply power to the remote IP Over Coax transmitter unit. The transmitter then powers the connect IP camera. The IP camera's power/video and P/T/Z data is now sent over the existing coaxial cable. The IP Over Coax System allowed us to not only utilize the existing coax but is also transparent to network and greatly exceeds the cable distance limitations previously discussed.