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O que (quem) é High Speed Circuit Switched Data - definição
DATA TRANSMISSION STANDARD FOR MOBILE PHONES
High-Speed Circuit-Switched Data; HSCSD; High Speed Circuit Switched Data; High-speed circuit-switched data; Cellular Switched Data; Circuit-Switched-Data; Circuit-Switched Data; GSM CSD; CDMA Circuit Switched Data
![Few devices support HSCSD – the Nokia CardPhone 2.0 [[PC Card]] is one of them.](https://commons.wikimedia.org/wiki/Special:FilePath/Nokia CardPhone 2.0.jpg?width=200 "Few devices support HSCSD – the Nokia CardPhone 2.0 [[PC Card]] is one of them.")
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://ericsson.com/wireless/products/mobsys/gsm/subpages/wise/subpages/hscsd.shtml) }.
http://gsmworld.com/.
(1999-12-04)
HSCSD
High Speed Circuit Switched Data (Reference: GSM, mobile-systems)
Wikipédia
Circuit Switched Data
In communications, Circuit Switched Data (CSD) is the original form of data transmission developed for the time-division multiple access (TDMA)-based mobile phone systems like Global System for Mobile Communications (GSM). After 2010 many telecommunication carriers dropped support for CSD, and CSD has been superseded by GPRS and EDGE (E-GPRS).
