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telephone line to phone cord: The wall jack. This connection is the most standardized, and often regulated as the boundary between an individual's telephone and the telephone network. In many residences, though, the boundary between utility-owned and household-owned cabling is a network interface on an outside wall known as the demarcation ...
For example, the six-position physical connector, plug and jack, is identically dimensioned and inter-connectable, whether it is wired for one, two, or three lines. These are the RJ11, RJ14, and RJ25 interfaces. The RJ standards designations only pertain to the wiring of the (female) jacks, hence the name Registered Jack. It is commonplace, but ...
Modular connectors are often referred to as modular phone jack and plug, RJ connector, and Western jack and plug.The term modular connector arose from its original use in modular wiring components of telephone equipment by the Western Electric Company in the 1960s. [1]
Because pair 1 is on the center pins (4 and 5) of the 8P8C connector in USOC and both T568A and T568B, a telephone will connect to line 1 of both T568A and T568B as well as all of the above registered jacks, but if a second line is used (3 and 6) is used, it connects to line 2 (pair 2) of USOC and T568A jacks, but to pair 3 of T568B jacks. This ...
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 ...
Some telephone technicians used mnemonic phrases, such as red-right-ring-rear, or ring-right-red-rough, to remember that the red wire connects to the right-side post in the wall jack and to the ring on the plug and to the rear lug on main distribution frames. Sometimes rough or ridge was added for jumper wires with a tactile code. [citation needed]