White paper
S312
44
September 2009
Abbreviations
3GPP™
3rd Generation Partnership Project. Collaboration
between a number of telecommunications
standards bodies to specify 3G. 3GPP™ also
maintains and develops the specifications for
GSM.
AAC
Advanced Audio Coding
AMR
Adaptive Multi-Rate. 3GPP™ standard for speech
coding (compression).
API
Application Programming Interface
CLDC
Connected Limited Device Configuration
CS
Circuit Switched. Connection from A to B which
has a fixed bandwidth and is maintained over a
period of time, for example a voice telephone call.
CS-1 to CS-4
Coding Scheme. Determines the data rate per
timeslot in GPRS.
CSD
Circuit Switched Data. CSD is a GSM service
providing a CS data connection at a rate of 9.6 or
14.4Kbps.
CSS
Cascading Style Sheet
DRM
Digital Rights Management. Controlling copying
and distribution of contents, with respect to
intellectual property rights.
DTMF or Touch Tone
Dual Tone Multi-Frequency signal – codes sent as
tone signals. Used for telephone banking,
accessing an answering machine and so on.
EDGE
Enhanced Data rates for GSM Evolution.
e-GSM
Extended GSM. New frequencies specified by the
European Radio Communications Committee
(ERC) for GSM use when additional spectrum is
needed (network-dependent). It allows operators to
transmit and receive just outside GSM’s core 900
frequency band. This extension gives increased
network capability.
EFR
Enhanced Full Rate, speech coding.
EMS
Enhanced Messaging Service. An extension of
SMS enabling pictures, animations, sound and text
formatting to be added to text messages. 3GPP™
has included EMS in the standards for SMS.
ETSI
European Telecommunications Standards Institute
FM
Frequency Modulation of the (radio) carrier wave
FR
Full Rate, speech coding.
