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Coaxial Cables Used in Telephony

A photograph of the original New York-Philadelphia coaxial cable, installed about 1936, is shown in Fig. 24. With this cable and a special carrier system, it is theoretically possible to have 240 simultaneous telephone conversations. With

coaxial cable New York - Philadelphia
Figure 24. View of the original coaxial cable installed between New York and Philadelphia. The ordinary wires are for voice-frequency circuits for talking purposes during tests. (Courtesy Bell Telephone System.)

later coaxial cables (page 434) and associated carrier equipment (page 432) it is possible to have 600 simultaneous telephone conversations. As many as eight coaxial conductors are used in coaxial telephone composite cables, which also contain ordinary cable pairs in addition to the coaxial conductors. The various geographical regions of the United States are now interconnected with a coaxial cable system.


Home Cables and Wave Guides Coaxial Cables Used in Telephony

Last Update: 2011-05-30