On Fri, September 11, 2009 15:08, Graham Shirville wrote: Hi Graham, > Hi, > > Would someone please be so kind as to explain the precise difference > between the two protocols GS232A and GS232B? > > I am missing something obvious I expect but.. If you get an answer direct, would you please send it me also? > > thanks > > Graham > G3VZV 73's Jan - PE0SAT