What is the purpose of the AUX jack in a car?
2 Answers
AUX is an audio input interface. The basic working principle of the AUX interface is that after connecting to the AUX interface, audio from electronic devices can be transmitted through the headphone jack and AUX interface to the car's audio system, allowing the audio to be played through the car's audio broadcasting facilities. The USB interface can be used to insert a USB drive for audio playback. When in use, one end of the connection is inserted into the AUX interface, and the other end is connected to devices such as mobile phones, MP3 players, MP4 players, or other video players. This allows you to listen to songs or niche music anytime, anywhere, without being limited to car music CDs. However, if the playback device runs out of power, the music will also stop (the interface is generally a 3.5mm labeled headphone jack). Aux, short for Auxiliary, is an additional signal line design. In general audio equipment, besides the standard output and input terminals, there are often several terminals labeled Aux, serving as backup connection points. These can be used for special applications, such as additional audio output or input. Such backup terminals or lines, whether for input or output, are collectively referred to as Aux. Function: The AUX port is an asynchronous port primarily used for remote configuration, dial-up connections, or connecting with a MODEM via a transceiver. It supports hardware flow control. The AUX port and CONSOLE port are usually placed together because they are suited to different configuration environments. The AUX interface establishes a command-line connection between the user and the device, enabling operations that are typically not possible in user mode, such as initialization, restoring default configurations, or correcting abnormal user modes. It provides a fixed port for the device, which can be used as a standard asynchronous serial port with a maximum speed of 115200bit/s. Through the AUX interface, functions like remote configuration of hardware products and line backup can be achieved. Note: When using the AUX interface, ensure you purchase the correct connecting cable and avoid plugging the audio cable into the wrong port. It is best to follow the usage steps provided in the product's manual. If you are still unsure, you can consult the product's official website or call for assistance.
As a veteran driver with over ten years of experience, I particularly love the AUX port in my car, which is that headphone jack-like slot. Its function is straightforward: use a 3.5mm audio cable with connectors on both ends to link the headphone port of your phone, MP3 player, or iPad to the car's audio system. This way, the songs, podcasts, or navigation voice stored on your phone can be played through the car speakers. I remember back in 2005 when I first bought my car, Bluetooth wasn't widely available, and I relied entirely on this port for music. Nowadays, some new cars have removed the AUX port, but for me, a wired connection is more stable—it doesn't suddenly cut out like Bluetooth does during long drives. Just be aware that the port can accumulate dust over time; a simple clean with an alcohol-soaked cotton swab wrapped around a toothpick will do the trick.
