Stereo cable 3.5mm 4-pin stereo jack plug/plug 1.5m
Stereo cable with additional function jack 3.5 mm plug (4-pin, stereo) to jack 3.5 mm plug (4-pin, stereo)
- Inner conductor made of pure copper
- Slim cable with gold-plated contacts
- Shielded
- Extra slim plug
Technical data
- Connection, contact material gold-plated
- Connection 1: Type jack 3.5 mm plug (4-pin, stereo)
- Connection 2: Type jack 3.5 mm plug (4-pin, stereo)
- Cable type Round cable
- Cable length 1.5 m
- Inner conductor, material CU (copper)
Packaging
DINIC box
Stereo plug with additional function (four-pole)
The stereo plug with additional function is a variant of the stereo plug in which an additional ring has been separated from the sleeve, thus providing a total of four contacts. Stereo plugs with additional functions are mainly used on mobile phones and smartphones to connect headsets. Two different variants of pin assignment are common for transmitting stereo audio and a mono microphone channel. Both variants use the tip to transmit the left audio channel and the first ring to transmit the right audio channel. In the Open Mobile Terminal Platform (OMTP) variant, the microphone channel is transmitted on the second ring and ground is on the third ring or socket. In the variant of the Cellular Telecommunications Industry Association (CTIA), also called inverted variant, the assignment of the microphone channel and the ground is swapped, so that the ground is on the second ring and the microphone channel is on the jack.
Both versions allow the trouble-free use of normal headphones with a three-pole jack plug in a four-pole socket, as the pin assignment of the tip and the first ring matches that of the three-pole plug. The microphone channel is then short-circuited directly to ground through the plug. The variant makes a difference when connecting a headset to a three-pole socket with a dedicated contact spring for ground (but without a contact ring for the shaft), such as those used in MP3 players or computers. If a four-pole plug is plugged into such a three-pole socket, the contact for ground is on the second ring. In the OMTP variant, the microphone channel is located here, so that a headset with a pin assignment according to the OMTP variant cannot be used in a three-pin socket. A headset with the pin assignment according to the CTIA variant, on the other hand, can be used in three-pin sockets without any problems, since the ground is located on the second ring and is correctly contacted by the socket. In this case, the microphone channel is without contact and inevitably without function.
The pin assignment according to the OMTP variant is used by older Nokia, Samsung and Sony Ericsson mobile phones. The CTIA variant, on the other hand, is used by Apple (iPhone, iPad, iPod and MacBook), AVM, Blackberry, Xbox One Stereo Headset Adapter, HTC, as well as by newer Nokia, Samsung and Sony mobile phones. It is also used in some notebooks from HP, Lenovo and Dell, as well as other devices. In some, especially older mobile phones, the pin assignment may differ from the variants described above. Standard accessories can then possibly only be used with adapters.
Source: Wikipedia
