With the continuous growth of the economy, video surveillance has become a widespread necessity across various sectors. Initially, it was mainly used in high-security areas such as government agencies and military facilities. Among these, the role of video optical transceivers is particularly crucial. As the technology behind these devices has matured, their costs have significantly decreased, making them more accessible and widely adopted for both transmission and reception purposes.
Today, video optical transceivers are applied in several key areas:
First, in traditional technical anti-monitoring applications, video optical transceivers play an essential role. These systems are commonly used in parks, critical infrastructure, public spaces, and financial institutions. The requirements vary depending on the location, but they generally focus on video transmission with some data control functions. For example, they may need to interface with alarm switches or support audio monitoring. Since cost is a major concern in these areas, single-channel analog or 4-channel optical transceivers are often chosen. Some models include switch expansion interfaces to accommodate specific needs. Audio interfaces usually operate at line level, so proper pre-amplification and speaker connection are necessary. It’s important to consider both input and output configurations when setting up such systems. Additionally, low-end analog transceivers may only support a limited data rate (up to 19.2 Kb), which can cause issues with certain control systems like matrix keyboards or high-speed domes that require higher speeds or different encoding methods.
Second, in urban road traffic monitoring, video optical transceivers are used to manage large-scale networks. The fiber infrastructure typically features a star topology, where each intersection connects directly to the central monitoring station. In addition to video backhaul, these systems often require control signals for traffic lights, electronic police equipment, and real-time data transmission. Some installations also demand two-way audio communication. Therefore, the transceivers must provide multiple data channels and an audio port. With the increasing demand for higher data rates—such as 38.4 Kb, 115.2 Kb, or even Ethernet interfaces—modern optical transceivers must be equipped to handle these requirements. At the central station, high-density rack-mounted units are often necessary due to the large number of receivers involved.
Third, in high-grade highway monitoring, optical transceivers are used in toll stations and critical sections like bridges and tunnels. These applications require high video capacity, long-distance transmission, and efficient use of fiber resources. In addition to video ports, they often need intercom interfaces, telephone lines, and Ethernet connections for office automation. To meet these demands, digital optical transceivers using Coarse Wavelength Division Multiplexing (CWDM) are commonly deployed. A single-wavelength device might support up to 16 channels, but with CWDM, up to 128 channels can be transmitted over a single fiber. This makes it ideal for large-scale highway monitoring. However, such complex systems require careful planning, simulation, and testing to ensure reliable performance.
Fourth, in large industrial enterprises, video optical transceivers are widely used for TV monitoring due to the harsh electromagnetic environment. These setups typically involve significant video backhaul, and many companies already have existing fiber networks. When integrating new monitoring systems, it's essential to understand the original network’s specifications, including fiber type (e.g., 50/125 mm or 62.5/125 mm multimode). Mismatches can lead to compatibility issues, so thorough evaluation is necessary before purchasing optical transceivers and pigtails.
As technology continues to evolve, video optical transceivers will find even more applications, driving further growth in the market. Their versatility and reliability make them a vital component in modern surveillance systems.
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