As nouns the difference between teletype and fax
is that teletype is teletype (teleprinter) while fax is fax (machine).
teletype
English
Noun
(
en noun)
A teleprinter
A message printed by a teleprinter
Early device for mainframe computer
Synonyms
* teleprinter
* TTY
Verb
(teletyp)
To operate a teleprinter
To send a message via teleprinter
fax
Etymology 1
From (etyl) (m), from (etyl) .
Noun
(en-noun)
The hair of the head.
Derived terms
* (l)
* (l)
* (l)
Etymology 2
From (facsimile), first attested 1979.
Noun
(faxes)
A fax machine or a document received and printed by one.
Verb
(es)
To send a document via a fax machine.