Cable:

When the unit after converting acoustic signal into electrical signal by the wires to the switch, and then by the switch on the circuit will transmit the electric signal directly to another phone answering, the process of transmission lines is the cable. If cable NaZhu copper core. Wire diameter is 0.32 mm, 0.4 mm and 0.5 mm, the bigger the diameter of the stronger communication ability; And by the number of core points, 5, 10, 20, 50, 100 to, 200, etc., here said the logarithm is refers to the cable for the maximum number of users; And according to encapsulate points, I do not know much about this. Cable: its size, weight, communication ability is poor, can only be used for short distance communication.

Cable:

When the unit after converting acoustic signal into electrical signal by the wires to the switch, and then by the switch to the electrical signal to a photoelectric conversion device (converts electrical signals into light signals) by the line to another photoelectric conversion equipment (converts light signals into electrical signals), and to answer the telephone exchange equipment, to the other. In the line between the two photoelectric conversion device is a cable. Has said it only a number of core points and core number: 4, 6, 8, 12, and so on. Fiber optic cable, its small size, weight, low cost, large capacity of communication, communication ability, etc. Due to many factors, it only be used for long distance and point to point (that is, the two exchanged room) the communication between the transmission.

The difference: cable inside is copper wire; Inside is glass fiber optical cable.

Communication cable is a certain amount of fiber according to certain methods of spring heart, outsourcing has a sheath, some still coated outer sheath, to realize the optical signal transmission, a communication line. In 1976, the United States in Atlanta, built the first bell optical fiber communication experiment system, adopted the western electric company has 144 optical fiber cable. In 1980, the commercial made of multimode optical fiber cable began in the city between the trunk and a few long used on line. Single-mode fiber made from commercial cable was started in 1983 on long-haul routes. Connections between the United States and Britain and France in 1988, the first successful across the Atlantic undersea optical cable laying, soon built the first submarine cable across the Pacific Ocean. China in 1978 to develop communication optical cable, USES is multimode optical fiber, cable structure for CengJiaoShi heart. Once successively in Shanghai, Beijing, wuhan and other places to carry out the field test. Soon after in local telephone network as inter-office trunks trial, 1984 years later, gradually used in long lines, and start using single-mode fiber. Communication optical cable has more than copper wire cable transmission capacity, relay, long distance, small volume, light weight, no electromagnetic interference, since 1976 has developed into the long trunk line, the city relay, offshore and transatlantic submarine communication, and local area network (LAN), private networks, such as cable transmission lines of the backbone, and began to subscriber loop wiring network in the city area development, for the optical fiber to the home, wide generation integrated services digital network with transmission lines.

Communication cable is usually composed of several or several groups of wire/each group of at least two twisted into a similar cord cable, insulated between each group of wires, twist and often revolve around a center, the bread has a highly insulating layer; Especially submarine cable

First: there are difference on material. Cable with metal (mostly for copper, aluminum) as the conductor; The cable with glass fiber as electrode.

Is there a difference on the second: transmission signal. Cable transmission is electrical signals. Optical cable transmission is optical signals.

Third: difference between application range. Cable is now used for energy transmission and low-end data information transmission (e.g., telephone). Fiber optic cable used for data transmission.