Telebit came along early with their UUCP g-protocol
spoofing, but that predated all the Hayes et al FAX support.
I don't think so. I think it was about the same time. We had both in the early
1980s when 120 cps was the fastest. Hayes may have been later with Fax support, certainly
with the 56K stuff, but we had fax support with the slower modems from another
manufacturer who's name escapes me now [IIRC it started with a C, they were black and
the SW interface was terrible/buggy].
Okay, nailing it down a bit more, according to my fuzzy memory ...
1982 ish: 1200 bps hayes (the black slab)
1084-5 ish: 2400 bps
1986 ish (telebit trailblazer)
1988 ish: trailblazer 2, v.32
I don't recall commodity FAX modem support until the V.34 stuff started rolling out
circa 1994(?). I'm curious to know of anyone shipping (interoperable) modem FAX bits
before then. I admit to not knowing of anyone or thing using V.17.
--lyndon