V.32

from The Free On-line Dictionary of Computing (8 July 2008)

V.32

   <communications, standard> An {ITU-T} standard {protocol} for
   {modems} transmitting at 9600 bits per second with {fall back}
   to 4800 {bps}.  {V.32bis} extended this to 14400 bps.

   V32 and V.32bis acheive bidirectional data transmission not by
   having different sets of tones at each end but by subtracting
   what is sent from what is received.

   (2004-07-30)