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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 ...
The connector provides power to the keyboard on the outer two contacts and receives data signals on the inner pair. The cable between the computer and the keyboard is a coiled cord with an appearance very similar to a telephone handset cable. [11] The connector on the Amiga 1000 uses crossover wiring, similar to a telephone handset.
Black telephone sets were equipped from the factory with straight brown textile-covered cords until 1952, when synthetic rubber jacketed cords became standard equipment. Optional retractile coiled cords were available both in textile and rubber jackets since the early 1940s. The 302 was a rugged and easily repaired desk telephone.
A common application of loading coils is to improve the voice-frequency amplitude response characteristics of the twisted balanced pairs in a telephone cable. Because twisted pair is a balanced format, half the loading coil must be inserted in each leg of the pair to maintain the balance.
Four-position, four-contact (4P4C) plug, used for connecting a telephone handset and base Six-position, six-contact (6P6C) jack , which could be wired as RJ11, RJ14, or RJ25335 A registered jack ( RJ ) is a standardized telecommunication network interface for connecting voice and data equipment to a computer service provided by a local exchange ...
The Australian letter-to-number mapping was A=1, B=2, F=3, J=4, L=5, M=6, U=7, W=8, X=9, Y=0, so the phone number BX 3701 was in fact 29 3701. When Australia around 1960 changed to all-numeric telephone dials, a mnemonic to help people associate letters with numbers was the sentence, "All Big Fish Jump Like Mad Under Water eXcept Yabbies."
For larger cable assemblies more complex schemes, such as the 25-pair color code, are used. 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 ...
A Trimphone, viewed from the side. The handset cradle functioned as a carrying handle when the receiver was off the hook, and the coiled cord in theory allowed the phone to be carried around. The Trimphone is a model of telephone designed in the early 1960s in the UK, the first prototypes appearing in 1965.
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