Teletex

TTX11 terminal, in this case being relabeled IBM PS/2

Teletex was ITU-T specification F.200[1] for a text and document communications service that could be provided over telephone lines. It was rapidly superseded by e-mail; however, the name Teletex lives on in several of the X.500 standard attributes used in Lightweight Directory Access Protocol.

  1. ^ "F.200 : Teletex service (withdrawn)". www.itu.int. Retrieved 2022-10-28.