What is an underground cable?

　　Underground fiber optic cable, also known as buried fiber optic cable, is a fiber optic communication tranSMission method that buries fiber optic cables underground for laying. The following is a detailed explanation of underground fiber optic cables:

　　I. Definition and Composition

　　Underground fiber optic cables usually consist of one or more optical fibers, protective tubes, fillers, steel wires or steel strips. Optical fibers are the core part of optical cables and are used to transmit optical signals, while protective tubes, fillers, etc. play a role in protecting optical fibers from external environmental damage.

　　Second, the application field

　　Underground fiber optic cables are widely used in various fields, including but not limited to:

　　Telecommunications: It is the main means to achieve inter-city and international fiber optic transmission, providing high-speed and stable Internet access and communication services.

　　Video surveillance field: used to connect video surveillance equipment, such as cameras, video recorders, and surveillance control centers, to support remote real-time monitoring and video storage.

　　Transportation field: It plays an important role in traffic signal control systems. Traffic lights and traffic control centers connected by optical fibers can achieve rapid and accurate traffic signal control and scheduling.

　　Intelligent building field: It can connect various devices in intelligent building systems, such as lighting control, security systems, building automation, etc., to achieve remote control, intelligent management, and energy conservation.

　　Utility applications: It is used to realize the remote monitoring and management of public facilities such as water, electricity, and gas, and to improve the efficiency and safety of public services.

　　Agriculture: It can be used for data transmission and remote monitoring in agricultural Internet of Things systems to achieve precision agriculture management.

　　III. Advantages and characteristics

　　Good anti-interference performance: The optical signal transmission of underground optical cables is not affected by electromagnetic interference and lightning strikes, and the signal is stable and reliable.

　　High bandwidth: The bandwidth of fiber optic transmission is much higher than that of traditional cables, which can meet the requirements of high-speed broadband.

　　Long transmission safety distance: The signal transmission technology of optical cable is long, the signal loss is small, and the risk of signal attenuation and signal information distortion is reduced.

　　Safe and reliable: Since the fiber optic cable is located underground, it is not easily affected by natural disasters and man-made damage, making it safe and reliable.

　　Simple maintenance: The underground cable is installed underground, with little impact on environmental factors, convenient maintenance and management, and does not take up space.

　　Strong cyber security: The communication mode of buried optical cable is optical signal transmission, and the physical structure of optical fiber makes it more difficult to be eavesdropped or cracked, and the security is high.

　　High economic efficiency: The construction cost of underground optical cables is relatively low, the lifespan is long, and it can continue to provide stable and reliable communication services, thus bringing economic benefits.

　　IV. Installation and maintenance

　　The installation of underground optical cables requires ground excavation or notch excavation, as well as engineering design and construction such as pipeline laying. Although the installation process is relatively complicated, once completed, its maintenance cost is relatively low because the optical cable is located underground and is less affected by the external environment. However, during the maintenance process, attention should still be paid to prevent the optical cable from being accidentally excavated or damaged, as well as regular cable performance testing and troubleshooting.

　　To sum up, as a reliable optical signal transmission method, underground optical cables have broad application prospects and significant advantages in various fields. With the continuous development of technology, the performance and application scope of underground optical cables will continue to expand and improve.