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Essential Guide to Telecommunications, The, Third Edition by Annabel Z. Dodd

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Cable Modems—Using Cable TV Facilities for Data Communications

Cable modems provide high-speed connections from homes, schools and libraries to the Internet over the same coaxial cable and fiber optic cabling used in cable TV networks. See Table 7.2 for a comparison of download speeds between cable modems, standard modems and one channel of ISDN service.

Cable modems are different than standard modems in how they perform a “handshake.” A handshake is an exchange of signals between modems before data is transmitted negotiating parameters such as speeds at which to send. On traditional landline service, modems perform handshakes with the modem with which they are exchanging data. Cable modems, however, “handshake” with modems located at the cable ...

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