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The first types of small modular telephone connectors were created by AT&T in the mid-1960s for the plug-in handset and line cords of the Trimline telephone. [1] Driven by demand for multiple sets in residences with various lengths of cords, the Bell System introduced customer-connectable part kits and telephones, sold through PhoneCenter stores in the early 1970s. [2]
A cable with a 50-pin connector on one end can support six fully wired 8P8C connectors or Ethernet ports on a patch panel with one spare pair. Alternatively, only the necessary pairs for 10/100 Ethernet can be wired allowing twelve Ethernet ports with a single spare pair. This connector is also used with spring bail locks for SCSI-1 connections.
Modern 4-wire however is the same diameter as 6-wire to allow technicians to retain existing tacking guns and cable clips. Note that the wires in the 6-wire cable are coloured with two colours in a ratio of four to one in length, with the first colour mentioned being the predominant one, e.g. if the indicated colour of the wire is W-B then the ...
The US military uses a variety of phone connectors including 9 ⁄ 32-inch (0.281-inch, 7.14 mm) and 1 ⁄ 4-inch (0.25 inch, 6.35 mm) diameter plugs. [43] Commercial and general aviation (GA) civil aircraft headsets often use a pair of phone connectors. A standard 1 ⁄ 4-inch (6.3
Schematic symbols for male and female connector pins. In electrical and mechanical trades and manufacturing, each half of a pair of mating connectors or fasteners is conventionally designated as male or female, [1] a distinction referred to as its gender. [2] The female connector is generally a receptacle that receives and holds the male connector.
Speakon connectors arrange their contacts in two concentric rings, with the inner contacts named +1, +2, etc. and the outer contacts connectors (in the four-pole and eight-pole version only) named −1, −2, etc. [7] The phase convention is that positive voltage on the + contact causes air to be pushed away from the speaker.
This connector has been standardized for RS-232 as TIA-574. Some miniaturized electronics, particularly graphing calculators [5] and hand-held amateur and two-way radio equipment, [6] have serial ports using a phone connector, usually the smaller 2.5 or 3.5 mm connectors and the most basic 3-wire interface—transmit, receive and ground.
Five-pin male 180° DIN connector from a 1988 Schneider MF2 keyboard by Cherry. The DIN connector is an electrical signal connector that was standardized by the Deutsches Institut für Normung (DIN), the German Institute for Standards, in the mid 1950s, initially with 3 pins for mono, but when stereo connections and gear appeared in late 1950s (1959 or so), versions with 5 pins or more were ...
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