hdx

2 definitions found

hdx - Free On-line Dictionary of Computing (26 May 2007) :

  half-duplex
  hdx
  
     <communications> (hdx, from telegraphy) 1. A type of
     communication channel using a single circuit which can carry
     data in either direction but not both directions at once.
  
     Compare: simplex, full-duplex.
  
     2. An obsolete term for local echo.
  
     (2001-07-21)
  

hdx - V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006) :

  HDX
         Half DupleX