V.34
<protocol> An
ITU-T standard modem serial line
protocol using symbol rates of 2400, 2743, 2800, 3000, >3200 and 3429 and up to 28800 bits per second.
The official V.34 draft recommendation was titled:
Modem operating at data signalling rates of up to 28 800 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits.
During the lengthy process of approval by
ITU-T, many manufacturers released 28.8 kbps modems described as "V.FAST". The V.34 recommendation was ratified by
ITU-T on 20 September 1994.
Rockwell and
US Robotics both have seats on the ITU-T, and have both released
chip set/
BIOS combinations that they feel will meet V.34.
V.34 modems will also support
V.FC if the manufacturer currently supports V.FC (e.g. Rockwell).
Some (all?) V.34 modems will also support
line probing.
ITU document (http://www.itu.int/itudoc/itu-t/rec/v/v34_25302.html).