赤せき外がい線せん通つう信しん

noun

infrared data communication

Technical term for data transmission using infrared light, commonly used in older mobile phones and remote controls.

• 昔むかしの携けい帯たい電でん話わには赤せき外がい線せん通つう信しん機き能のうが付ついていた。

  Old mobile phones had an infrared data communication feature.