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high speed circuit switched data

资料来源 : Free On-Line Dictionary of Computing

High Speed Circuit Switched Data
     
         (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://www.ericsson.com/wireless/products/mobsys/gsm/subpages/wise/subpages/hscsd.shtml)}.
     
        {(http://www.gsmworld.com/)}.
     
        (1999-12-04)
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