Abbreviations - Sony Ericsson Walkman W200 White Paper

Abbreviations

3GPP™
3rd Generation Partnership Project. Collaboration
between a number of telecommunications stand-
ards 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
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 pro-
viding a CS data connection at a rate of 9.6 or
14.4kbps.
CSS
Cascading Style Sheet
DM
Device Management. DM utilizes GPRS as bearer
(basic network connectivity needs to be in place) of
the provisioning data and allows the operator to
access the phone and check and set different set-
tings such as Network connectivity (GPRS), email,
MMS, WAP and Java.
DRM
Digital Rights Management; controlling copying
and distribution of contents, with respect to intel-
lectual property rights.
DTMF or Touch Tone
Dual Tone Multi-Frequency signal – codes sent as
tone signals. Used for telephone banking, access-
ing an answering machine, etc.
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.
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White paper W200
April 2007