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When used for plain old telephone service (POTS), the first wire is known as the tip or A-leg (U.K.) conductor, and is usually connected to the positive side of a direct current (DC) circuit, while the second wire is known as the ring lead or B-leg (U.K.), and is connected to the negative side of the circuit. Neither of these two sides of the ...
To communicate in both directions in the same wire pair, conversion between four-wire and two-wire was necessary, both at the telephone and at the central office. A hybrid coil accomplishes the conversion for both. At the central office, it is part of a four-wire terminating set, more often as part of a line card. A modern line card has no two ...
A party line ( multiparty line, shared service line, party wire) is a local loop telephone circuit that is shared by multiple telephone service subscribers. [ 1][ 2][ 3] Party line systems were widely used to provide telephone service, starting with the first commercial switchboards in 1878. [ 4] A majority of Bell System subscribers in the mid ...
Main lines in use: 2,567,938 (2020 est.) [2] Mobile cellular: 25,068,249 (2020 est.) [2] Pre-paid: 17,283,257. Post-paid: 6,847,497 [3] System: privatization began in 1988; advanced telecommunications infrastructure; modern system based on extensive microwave radio relay facilities; fixed-line connections have dropped in recent years as mobile ...
For a student software discount, check out Microsoft, which offers a 10% price reduction on select products. Students can also get Microsoft 365 Personal for 50% off , at $2.99 per month. All you ...
BS 6312 431A plug, colloquially a British Telecom 4-wire male plug. British telephone sockets were introduced in their current plug and socket form on 19 November 1981 by British Telecom to allow subscribers to connect their own telephones. The connectors are specified in British Standard BS 6312. [ 1][ 2][ 3] Electrical characteristics of the ...
A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. [ 1] It is designed to reproduce speech of a quality that is understandable. [ 2] It is the physical wire or other signaling medium connecting the user's telephone apparatus to the telecommunications network ...
Category 2 cable, also known as Cat 2, is a grade of unshielded twisted pair cabling designed for telephone and data communications. The maximum frequency suitable for transmission over Cat 2 cable is 4 MHz, and the maximum bandwidth is 4 Mbit/s. [ 1][ 2] Cat 2 cable contains 4 pairs of wires, or 8 wires total. [ 3]