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Phone connector (audio)
In electronics, a phone connector, also known as phone jack, audio jack or jack plug, is a common family of connector typically used for analog signals, primarily audio. It is cylindrical in shape, typically with two, three or four contacts. Three-contact versions are known as TRS connectors, where T stands for "tip", R stands for "ring" and S stands for "sleeve". Similarly, two- and four-contact versions are called TS and TRRS connectors respectively.
The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used. In its original configuration, the outside diameter of the "sleeve" conductor is inch (exactly 6.35 mm). The "mini" connector has a diameter of 3.5 mm (approx. inch) and the "sub-mini" connector has a diameter of 2.5 mm (approx. inch).
== Other terms ==
Specific models are termed stereo plug, mini-stereo, mini jack, headphone jack and microphone jack.
In the UK, the terms jack plug and jack socket are commonly used for the respective male and female phone connectors. In the US, a stationary (more fixed) electrical connector is called a "jack". The terms ''phone plug'' and ''phone jack'' are sometimes used to refer to different genders of phone connectors, but are also sometimes used colloquially to refer to RJ11 and older telephone plugs and the corresponding jacks that connect wired telephones to wall outlets. Phone plugs and jacks are not to be confused with the similar terms ''phono plug'' and ''phono jack'' (or in the UK, ''phono socket'') which refer to RCA connectors common in consumer hi-fi and audiovisual equipment.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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