The core of a communication optical cable is usually a double-layer concentric cylinder made of quartz glass with a small cross-sectional area. It is brittle in texture and easy to break, so it needs an additional protective layer. Characteristics of optical fiber: Because optical fiber is a transmission medium, it can transmit telephone calls or computer data like ordinary copper cables. The difference is that optical fiber transmits optical signals instead of electrical signals. Therefore, optical fibers have many unique features. The advantages of such as: wide bandwidth, low loss, shielding electromagnetic radiation, light weight, security, privacy, and operation of optical fiber systems: you may know that any communication transmission process includes: encoding → transmission → decoding, of course, transmission of optical fiber systems The process is also roughly the same. After the electronic signal is input, the signal is digitally encoded by the transmitter to become an optical signal, and the light is transmitted to the receiver at the other end through the fiber. The receiver then decodes the signal to restore the original electronic signal. Signal output. Application of optical fiber cable: The application of optical fiber cable can be divided into three types: professional use, general outside, inside the house. Professional uses include submarine optical cables, empty overhead optical cables on high voltage electrical towers, and nuclear power plant Radiation fiber optic cable, anti-corrosion fiber optic cable in chemical industry, etc., and the classification difference between general house and general house depends on the characteristics of each type of fiber optic cable and manufacturing design, and its applicable scope varies.
Maintenance method of communication optical cable lines: Metro optical cable lines in communication optical cables are mainly pipeline optical cables, supplemented by overhead and other laying methods of a very small number of optical cables, which are characterized by relatively short line segments, which can be divided into inter-office relays, users The backbone of the access network and users introduce optical cables, and the number of cores of the optical cables is diversified (for example, Tianjin's metropolitan area network optical cables have 6, 8, 12, 24, 48, 72, 96, 144, 216, 288 cores, etc.), and There are many optical fiber cable segments above 48 cores, and the optical cable routing is complicated. According to the line maintenance procedures, the optical adapter on the ODM disk in the optical cable distribution frame (ODF) is used as the demarcation point. The line equipment outside the adapter (that is, the optical cable side) belongs to the scope of optical cable maintenance. The line part belongs to the maintenance scope of transmission equipment. The basic task of optical cable line equipment maintenance is to keep the line equipment intact and good; to ensure good transmission quality, to prevent and remove obstacles as soon as possible.
In the process of repairing communication cable interruption obstacles, the communication cable maintenance department shall cooperate closely with the transmission equipment maintenance department and obey the dispatch of the transmission maintenance department. Under normal circumstances, the optical system alarms, and the transmission department first determines whether it is a problem with the optical fiber line. If so, the optical fiber line maintenance department is immediately notified. The maintenance personnel further determine the type, range, and location of the optical cable line through core testing. In the case, it is necessary to cooperate with the transmission department to temporarily jump the interrupted optical system to other spare fiber cores in order to restore communication.