Computer cable and fiber cable performance

A computer cable is usually a rope-like cable twisted from several sets of wires (at least two in each group). Each set of wires is insulated from one another and often twists around a center to form a cable core. The group covers the shielding layer, and some of the entire cores are covered with a shielding layer, and each group and the core have a shielding layer. According to the different laying conditions, in order to protect the cables, some computer cables have armored layers, and the outermost layer is covered with an outer sheath. Computer cables are widely used in fields such as power generation, metallurgy, mining, petrochemicals, transportation, and scientific and technological defense, and as computer network (DCS systems), automatic control system detection devices, and instrumentation connection cables.

Fiber optic cable is an abbreviation of optical fiber cable. It is a medium for transmitting optical signals. It consists of a core, a clad, and an outer layer of reinforced strength protective layer. The core is made of silicon dioxide doped with germanium, phosphorus and other materials, cylindrical. The outer layer is made of pure silica, which refracts the light signal into the core. The optical fiber is divided into single-mode and multi-mode. The single-mode provides only one optical path, and the multi-mode has multiple optical paths. The single-mode optical fiber has large capacity and is more expensive. At present, the size of the single-mode optical fiber core is about 8.3 μm/125 μm. , Multimode core is commonly used for 62.5μm/125μm. Fibers can only be transmitted in one direction. If two-way communication is required, they should be used in pairs. The domestic optical cable service speed has reached 100Mbps, and service providers said that the number will eventually be increased to 1Gbps to 10Gbps. Its advantages include small size, low weight, low cost, large communication capacity, and strong communication capabilities. Due to many factors, it is currently used only as a communication between long-distance and point-to-point (ie two switch rooms).