Application Examples of Video Optical Terminals

With the rapid development of [video optical terminal]( technology and the construction of domestic communication fiber optic networks, optical terminal equipment is being applied in an increasing number of fields. This article mainly introduces the applications of Raytrans digital video optical terminals in fields such as security, highway, and urban traffic.

Raytrans digital video optical terminals feature a complete range of models and flexible configurations, and can be widely applied across various industries. The main industries of application include: Intelligent Transportation System (ITS), security systems, intelligent buildings/smart communities, campus networks, industrial monitoring (power, chemical, steel, railway, etc.), military monitoring (border defense, guard, etc.), and sports venues (live audio/video transmission).

1. Security System Monitoring Application Example

   Several video channels used for surveillance in the same prison cell are transmitted to the monitoring center via optical terminals, and then displayed on the monitoring screen after switching through the video matrix. Meanwhile, audio signals collected by microphones in the prison cell are also transmitted to the monitoring center via optical terminals, and the intercom system at the monitoring center is also transmitted through the bidirectional audio channels of the optical terminals. Control and data transmission are also carried out through the [video optical terminal](

2. Highway Monitoring Application Example

   Since the distance between each highway toll station and the monitoring center is relatively long, and the entire monitoring system along the line requires uploading a large number of images, the cost-effectiveness of using point-to-point optical terminals for image transmission is not ideal. Therefore, multi-channel video transmission node machines are used in cascade mode at highway toll stations for image transmission. That is, N toll stations each switch out 2 (or 3, 4) video channels through the video matrix, and these are transmitted to the monitoring center via a single fiber core in cascade through video node optical terminals. Meanwhile, the reverse control data for monitoring (PTZ, lens, matrix switching, etc.) at each toll station is provided through a data channel from each toll communication station.

3. Urban Traffic Monitoring Application Example

   Currently, many cities use traffic monitoring systems that employ video optical terminals for video image transmission. Each monitoring point is equipped with a CCD camera, PTZ, and an optical transmitter. A single-core or dual-core optical cable is laid from the traffic monitoring center to each monitoring point. One end of the optical cable is connected to the optical transmitter, and the other end is connected to the optical receiver at the monitoring center. Video image signals are output from the field camera to the optical transmitter, which converts the electrical signals into optical signals and sends them into the optical cable. The optical signals travel through the cable to the optical receiver at the monitoring center. The optical receiver restores the received signals to video signals and sends them into the image display and control system for processing. PTZ control signals are also transmitted through optical terminals. The PTZ control signals from the traffic command center are input through the serial interface of the optical terminal, and the optical terminal at the monitoring site converts the optical signals into electrical signals, which are sent to the decoder and then output as PTZ and lens control signals. Meanwhile, the electronic police system occupies one channel of same-direction RS-232 data; the traffic signal light system occupies one channel of reverse-direction RS-232 data; and the intercom system is transmitted through the bidirectional audio channels of the optical terminal.

4. Industrial Television Monitoring Application in Large Enterprises

   Large industrial and mining enterprises, due to their harsh electromagnetic environments and severe interference, were among the earliest industries to use optical terminals for industrial television monitoring. In such applications, the main requirement is the return transmission of a large number of video signals, so choosing pure video optical terminals is sufficient to meet the requirements. Many enterprises, because their internal data fiber optic networks are already operational, often require monitoring equipment to utilize existing fiber resources. In this case, it is necessary to clarify certain technical parameters of the original fiber network and the status of spare fiber cores. When the original fiber is multimode fiber, it is also necessary to determine whether it is 50/125mm or 62.5/125mm multimode fiber. Otherwise, difficulties may arise when selecting optical terminals and matching pigtails.

In summary, it can be seen that the diversification of application environments has promoted the development of [video optical terminal](