High Speed Circuit Switched Data
<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://www.ericsson.com/wireless/products/mobsys/gsm/subpages/wise/subpages/hscsd.shtml).
(http://www.gsmworld.com/).
