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Description of the difference between computer cable and fiber cable

First: There is a difference in materials. The computer cable is made of metal, most of which is a copper conductor; the fiber optic cable is made of glass fiber.

       Second: there is a difference in the transmission signal. The computer cable transmits electrical signals. The optical cable transmits the optical signal. Both play the role of transmitting data. From the user's point of view, the optical cable transmits data much faster than the computer cable. Inside the cable is the optical fiber, the data is transmitted by the speed of light, and the cable is made of metal (usually copper), with the electronic pulse as the data medium, and the speed is the speed of the electron movement (not the electromagnetic wave speed).

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 Third: There are differences in the scope of application. Cables are now used for energy transmission and low-end data transmission. Optical cables are mostly used for data transmission.

       A computer cable is usually a cable-like cable that is twisted from several sets of wires (at least two in each group). Each set of wires is insulated from each other and often twisted around a center into a core, and each The group is covered with a shielding layer, and some of the entire core is covered with a shielding layer, and each of the groups and the core has a shielding layer. Depending on the laying conditions, in order to protect the cable, some computer cables have an armor layer outside, and the outermost layer is covered with an outer sheath. Computer cables are widely used in power generation, metallurgy, mining, petrochemical, transportation, science and technology defense, etc., as computer network (DCS system), automatic control system detection device and instrumentation cable.


       Optical fiber cable is an abbreviation of optical fiber cable. It is a medium for transmitting optical signals. It consists of a core, a cladding layer and an outer layer of a protective layer with enhanced strength. The core is made of silica mixed with bismuth, phosphorus and other materials and has a cylindrical shape. The outer bread layer is made of pure silica, which refracts the light signal into the core. The optical fiber is divided into single mode and multimode. The single mode only provides one optical path, and the multimode has multiple optical paths. The single mode fiber has large capacity and is expensive. Currently, the single mode fiber core has a cladding size of about 8.3 μm/125 μm. The multimode core is commonly used for 62.5μm/125μm. Optical fibers can only be transmitted in one direction. If two-way communication is required, they should be used in pairs. The domestic cable service speed has reached 100Mbps, and the service provider said that it will eventually increase the number to 1Gbps to 10Gbps. The utility model has the advantages of small volume, small weight, low cost, large communication capacity and strong communication capability. Due to a number of factors, it is currently only used for communication between long distances and points and points (ie, two switch rooms).

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