It is well known that transmission media is used for transmission of network signals in network cabling, and two transmission media, cable and fiber, are often used in wiring. Cable types are mainly divided into shielded twisted pair and unshielded twisted pair. The fiber is also divided into multimode fiber and single mode fiber. Today, I will share with you the advantages and disadvantages of the cable and cable. ,
Aluminum foil shielded twisted pair FTP
Large bandwidth, strong anti-interference performance, low smoke and halogen free. In contrast, the shielded wire has a higher price and installation cost than the unshielded wire, and the cable bending performance is slightly worse. This type is used in Category 6 and previous shielding systems.
Unshielded twisted pair UTP
It is currently the most widely used cabling system in China. It is suitable for network applications with transmission bandwidth below 250MHz and no special performance requirements. Its advantages are good overall performance, low price, and convenient construction and maintenance. Category 6 cabling systems have reached the performance limits of unshielded twisted pair.
Independently shielded twisted pair STP
Each pair of wires has an aluminum foil shield, and the four pairs of wires together have a common metal braided shield, which is the standard structure for the seven types of cable. It is suitable for high-speed network applications, providing highly secure transmission, supporting future new applications, helping to unify the wiring platform of current network applications, enabling all kinds of information from email to multimedia video to be in the same high-speed system. In transit.
The extra shield makes the Category 7 line have a larger wire diameter. These features require special care when designing the routing and termination space, leaving a large amount of space and a large bend radius.
Moreover, due to its excellent shielding design and high bandwidth, a typical seven-channel channel can even provide a pair of 862MHz bandwidth for transmitting cable TV signals, analog audio signals for another pair, and then third. Four-wire pair transmission of high-speed LAN information. This kind of application is unimaginable at present, but will soon be implemented by a Category 7 cabling system.
Compared to fiber-optic LANs, the seven-category cable system solution provides the desired performance and bandwidth, but the overall cost is only a fraction of the fiber. Some people think that fiber optic systems can bring enough bandwidth to people, and fiber optic cable is close to the price of Category 7 cable. However, if the cost of fiber routers, optical switches, and optical network cards is taken into account, the price advantage of fiber will be quickly lost.
Optical cable, especially single-mode optical cable, can be used for high-speed network transmission, and has the advantages of innate electromagnetic interference immunity, high reliability, and support for long-distance transmission. It is an ideal network transmission medium in the future, and its status is increasingly important.
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Label: Encyclopedia popular: the contrast between network cable and optical cable
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