pdh

2 definitions found

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

  Plesiochronous Digital Hierarchy
  PDH
  
     <communications> (PDH) A transmission system for voice
     communication using plesiochronous synchronisation.
  
     PDH is the conventional multiplexing technology for network
     transmission systems.  The transmitter adds dummy information
     bits to allow multiple channels to be bit interleaved.  The
     receiver discards these bits once the signals have been
     demultiplexed.
  
     PDH combines multiple 2 Mb/s (E1) channels in Europe and
     1.544 Mb/s (DS1) channels in the US and Japan.
  
     PDH is being replaced by SONET and other SDH (Synchronous Digital Hierarchy
     ) schemes.
  
     (2003-09-30)
  

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

  PDH
         Plesiochronous Digital Hierarchy (ATM)