What is "teletex"

proprietary name for a computer data-sharing network, 1978.

n. A text and document communications service provided over telephone lines, designed as an upgrade to the conventional telex service but rapidly superseded by electronic mail.

Teletex was an ITU-T specification for a text and document communications service that could be provided over telephone lines. Teletex allowed for the transmission and routing of Group 4 facsimile documents. It was rapidly superseded by e-mail but the name Teletex lives on in several of the X.500 standard attributes used in Lightweight Directory Access Protocol.