See: Headphone Jack (3.5mm) 2.5mm connectors are still common for TTY devices for the hearing impaired. Therefore most modern phones require a 3.5mm-to-2.5mm adaptor in order to connect to a TTY ...

While watching a video about old radios from the 1920s, a phone jack popped up. The host mentioned that phone jacks are super old and he wondered what was their origin. I always assumed they had ...

Also called a 3.5mm or 1/8" connector, it is a plug and socket widely used for analog audio signals in portable devices. For example, the headphone jack on iPods, tablets and portable DVD players ...

When your phone quits working or static develops on the line, your phone jack may need to be replaced. We'll show you how to ...

This however does put users who need a headphone jack to connect to legacy hardware at significant odds with market trends, limiting choices available to them to a much smaller pool of devices.