With the advancement of urbanization in our country and the continuous occurrence of emergencies, urban public safety and emergency response systems for emergencies are receiving increasing attention from governments at all levels, with the most critical part being the construction of security video surveillance networks. This article introduces how to establish a security video surveillance network for small and medium-sized cities and towns using digital optical transceivers.
Why use optical transceivers for networking
Although there are various video transmission solutions available now, we still recommend that homeowners use fiber optic cables when building security video surveillance network solutions for small cities and townsDigital optical transceiverTo build a transmission platform.
-Renting broadband circuits is relatively expensive. Currently, broadcasting and television, telecommunications, and China Netcom can all rent circuits, but E1 dedicated lines and VLAN dedicated lines are more expensive. Ordinary broadband circuits are mainly used for digital services, and there are QoS issues when transmitting videos.
-Security video surveillance networks generally have a star structure, requiring a relatively high bandwidth at the central end.
-Renting broadband circuits requires a lot of equipment and is expensive, with complex system maintenance. To rent broadband circuits, users need to configure various optical transceivers, fiber optic transceivers, E1 multiplexers, L2/L3 switches, video codecs, and due to the high requirements for transmitting images, equipment costs are also expensive, requiring high-level system maintenance personnel. by comparison:
-In small and medium-sized cities, the cost of fiber optic cables in urban areas is not high, and the price of fiber optic cables decreases relatively quickly.
-The transmission of video over optical fiber using a digital optical transceiver can reach the level of mid-range broadcasting, which is compatible with MPEG 2, MPEG 4, and JPEG.
-Used on optical fibersDigital optical transceiverThe transmission equipment used in the video transmission scheme is the optical transceiver, and the digital optical transceiver does not require any settings or adjustments. Even personnel without professional background can install it.
-No need to pay rental fees, it can be used for a long time.
Basic methods of networking
Use a pair of digital optical transceivers with single channel video/reverse data to transmit the video signal of the monitoring camera to the monitoring center. Use a video distributor to divide the video signal into two paths, one entering the video matrix and the other entering the hard disk recorder. The video matrix is connected to the display screen, and monitoring point videos can be scheduled through the control keyboard of the video matrix.
Selection of video optical transceiver
Nowadays, there are many types on the marketVideo optical transceiverThere are options for engineering companies to choose from, but you need to consider the following factors: - Is it an analog FM optical transceiver or a digital optical transceiver? -Can it meet environmental requirements? -Are there lightning protection measures in place? Does the output optical power meet your requirements? The services and quality assurance provided by the manufacturer - cost-effectiveness.