v.34
     
         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.
     
        1998-07-03
     
     
see also:
itu-t standard modem protocol symbol rate rockwell 
us robotics chip set bios v.fc line probing 
lt;itu documentgt;