Source : Free On-Line Dictionary of Computing

V.10
     
         An {ITU-T} recommendation on
        electrical characteristics for {unbalanced} {double-current
        interchange circuits} operating at {data signalling rates}
        nominally up to 100 kbps.  This recommendation is also
        included but not published in {ITU-T} X series under alias
        number X.26.  The circuit defined in this standard is used in
        other {serial line} standards such as {EIA-232} and {EIA-423},
        that implement {single ended} communication.
     
        (2002-10-05)