Modular connector
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A modular connector is a type of electrical connector for cords and cables of electronic devices and appliances, such as in computer networking, telecommunication equipment, and audio headsets.
Left to right, modular connectors: 8P8C plug, 6P6C plug, 6P4C plug, 4P4C plug, 6P6C jack.
An 8P8C modular plug. This is the common crimp-type plug, of the same kind pictured above crimped onto a cable (with molded sleeve).
8P8C plug with contacts for solid wire (left) and stranded wire (right)
Contacts for solid wire (top left) and stranded wire (bottom right)
Electrical connector
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Components of an electrical circuit are electrically connected if an electric current can run between them through an electrical conductor. An electrical connector is an electromechanical device used to create an electrical connection between parts of an electrical circuit, or between different electrical circuits, thereby joining them into a larger circuit.
This rear panel of an integrated amplifier features a variety of electrical connectors
Connectors on the back of a 2018 computer
NMEA 2000 cabling using M12 connectors
A 4-pin Mini-DIN S-Video cable, with notches and a rectangular alignment pin