high speed circuit switched data

from The Free On-line Dictionary of Computing (8 July 2008)
High Speed Circuit Switched Data
HSCSD

   <communications> (HSCSD) A planned feature of {GSM Phase 2}
   defining a standard for {circuit switched} data transmission
   over a {GSM} link at up to 57.6 (78.8?) {kbps}.  This is
   achieved by concatenating up to four consecutive GSM
   {timeslots}, each of which is capable of 14.4 kbit/s.  It uses
   {multiplexing} and {compression} or filtering.

   The following services toward the fixed network are
   supported: {V.34} up to 28.8 kbps and {V.110} with rate
   adaptation up to 38.4 kbps.

   HSCSD is aimed at {mobile workstation} users.  As it is
   circuit switched, it is suited to {streaming} applications
   such as {video conferencing} and {multimedia}.  {Bursty}
   applications like {electronic mail}, are more suited to
   {packet switched} data (as in {GPRS}).

   Ericsson
   
(http://ericsson.com/wireless/products/mobsys/gsm/subpages/wise/subpages/hscsd.shtml).

   (http://gsmworld.com/).

   (1999-12-04)