Source : Free On-Line Dictionary of Computing

RS-232C
     
         The {EIA} equivalent of {ITU-T}
        {standard} {V.24}.
     
        The {EIA} EIA-232C electrical signal is unbalanced +/- 5 to +/-
        12V, {polar} {non return to zero} and handles data speeds up
        to 19.2 kilobits per second.
     
        [Correct name?  Difference from EIA-232?]
     
        (2000-02-03)