wire twisted in pairs
21Modular connector — This article is about modular connectors. For the registered jack (RJ) wiring standard, see registered jack. Left to right, modular connectors: 8P8C plug, 6P6C plug, 6P4C plug, 4P4C plug, 6P6C jack …
22Transmission line — This article is about the radio frequency transmission line. For the power transmission line, see electric power transmission. In communications and electronic engineering, a transmission line is a specialized cable designed to carry alternating… …
23Copper cable certification — 10G Certification Kit In copper twisted pair wire networks, copper cable certification is achieved through a thorough series of tests in accordance with Telecommunications Industry Association (TIA) or International Organization for… …
24Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …
25telecommunications media — Introduction equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation Every… …
2625-pair color code — The 25 pair color code is a color code used to identify individual conductors in a kind of electrical telecommunication wiring for indoor use, known as twisted pair cables (often seen with RJ21 cables). The colors are applied to the insulation… …
27TIA/EIA-568-B — is a set of three telecommunications standards from the Telecommunications Industry Association, a 1988 offshoot of the EIA. The standards address commercial building cabling for telecom products and services. The three standards are formally… …
28Spinning mule — A pair of Condenser spinning mules. These have 741 spindles, being cut down from 133 feet (41 m) 1122 spindles they used to have up until the 24th Sept 1974, when they were retired from Elk Mill, Royton. The mule was built by Platt Brothers …
29Registered jack — A registered jack (RJ) is a standardized physical interface both jack construction and wiring pattern for connecting telecommunications equipment (commonly, a telephone jack) or computer networking equipment to a service provided by a local… …
30USB — This article is about the computer bus to connect peripherals. For other uses of USB, see USB (disambiguation). Universal Serial Bus Original logo Type Computer Hardware Bus …
