What's the plural form of teletex? Here's the word you're looking for.
Answer
The noun teletex can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be teletex.
However, in more specific contexts, the plural form can also be teletexes e.g. in reference to various types of teletexes
or a collection of teletexes.
Examples
The design of a gateway that can interconnect teletex and OSI networks is shown.