data service unit

1 definition found

data service unit - Free On-line Dictionary of Computing (26 May 2007) :

  data service unit
  digital service unit
  
     <communications> (DSU or "data service unit") A device used in
     digital transmission for connecting a CSU (Channel Service
     Unit) to Data Terminal Equipment (a terminal or computer),
     in the same way that a modem is used for connection to an
     analogue medium.
  
     A DSU provides a standard interface to a user's terminal which
     is compatible with modems and handles such functions as
     signal translation, regeneration, reformatting, and timing.
     The transmitting portion of the DSU processeses the customers'
     signal into bipolar pulses suitable for transmission over the
     digital facility.  The receiving portion of the DSU is used
     both to extract timing information and to regenerate mark and
     space information from the received bipolar signal.
  
     (1995-01-30)