User's Manual

180 Terms and definitions
CSS
Cascading Stylesheet. A feature of browsers.
DTMF
Dual-Tone Multifrequency. A method of coding digits as a
combination of two audible tones.
DUN
Dialup Networking. The dialup networking capability in
Windows.
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
900MHz frequency band. This extension gives increased
network capability.
EMS
Enhanced Messaging Service. An extension of SMS enabling
pictures, animations, sound and text formatting to be added to
text messages.
FCC
Federal Communications Commission. US government agency
which regulates radio communications.
GIF
Graphics Interchange Format. Format for storing images that
also supports animated images. Highly compressed by limiting
the color palette to 16 or 256 colors. It is one of the two most
common file formats for graphic images on the Web. The other
is JPEG.
GPRS
General Packet Radio Services. A radio technology for GSM
networks that adds packet-switching protocols, shorter setup
time for ISP connections, and the possibility of charging by the
amount of data sent rather than by connection time. GPRS
promises to support flexible data transmission rates typically up
to 20 or 30 kbps (with a theoretical maximum of 171.2 kbps), as
well as continuous connection to the network.
GSM
Global System for Mobile Communications. GSM is the world's
most widely-used digital cellphone system, now operating in
over 160 countries around the world.
GSM 900
The GSM system family includes GSM 900, GSM 1800 and
GSM 1900. GSM 900 refers to GSM working on a frequency of
900 MHz.