|
Word |
Description |
|
|
|
|
Data Transmission |
Transmitting data over the mobile phone network using your
mobile handset. Your mobile phone could be used as a modem when
connected to your notebook or desktop computer, and even PDAs to
transmit such data. |
|
Digital Transmissions |
Digital transmissions pass sounds in the form of a stream of
binary numbers, rather than as an analogue electrical signal. |
|
Drop Out |
When a call on a mobile phone is prematurely cut off due to
congestion or lack of coverage onthe network. |
|
Desk Charger |
A device which allows you to charge your phone in an upright
position and also lets you charge an additional battery at the
same time. |
|
DTMF |
Facility for sending multi-frequency tones across the network
from a phone. Each number, when pressed, transmits its own
individual sound. Necessary fro accessing some network features. |
|
Dual-band |
Phone that can switch between two different bands of frequencies
GSM900 and GSM1800. |
|
Dual-mode |
Phone that can operate using two different standards. |
|
Data/Fax Capability |
A mobile phone can be used to send and receive fax and data
files, access the internet, and send email when connected to
mobile office equipment. |
|
D-AMPS |
Digital AMPS (Digital-Advanced Mobile Phone
Service) is the digital wireless standard widely used throughout
the Americas, Asia Pacific and other areas. D-AMPS uses digital
TDMA on the one hand, and is required to be compatible with
installed AMPS base station networks on the other. D-AMPS
operates on the 800 and 1900 MHz bands. |
|
DCS 1800 |
Digital Communications System: another name for
GSM working on a radio frequency of 1800 MHz. Also known as
GSM1800 or PCN, this digital network operates in Europe and Asia
Pacific. |
|
ESN |
(Electronic Serial Number) Unique identifer transmitted by
analogue cellphones. |
|
ETA |
“Estimated Time of Arrival” of a newly announced product, in a
shorten form. |
|
EFR |
Enhanced Full Rate. This is a network and handset feature
enabling better speech quality to GSM users. |
|
EMS |
Enhanced Message Service. The technology allow mobile phone
users to send and receive words, add pictures, animation and
sound clips. |
|
Enhanced Service |
Any telecommunications service that uses computer applications
to provide consumers with value-added telephone services, such
as voicemail and call waiting. |
|
EMEA |
Europe, Middle East and Africa |
|
EDGE |
Enhanced Data Rates for GSM Evolution. An
enhanced modulation technique designed to increase network
capacity and data rates in GSM networks. EDGE should provide
data rates up to 384 Kbps. EDGE will let operators without a 3G
license to compete with 3G networks offering similar data
services. EDGE is not expected before 2001 at the earliest. |
|
EPOC |
Deprecated term. Refer to Symbian OS. |
|
E-TACS |
Extended Total Access Communications System: a 1G
mobile phone network developed in the UK and available in Europe
and Asia. |
|
Flagfall |
The set amount which you pay for the first 30 seconds of your
call. |
|
Fax/Data Facility |
Mobile phones can support faxes, and connect to the internet
just like fixed line phones. |
|
Frame Relay |
Frame relay is a telecommunication service designed for
cost-efficient data transmission for intermittent traffic
between local area networks (LANs) and between end-points in a
wide area network (WAN). It is based on the older X.25
packet-switching technology which was designed for transmitting
analogue data such as voice conversations. Unlike X.25 which was
designed for analogue signals, frame relay is a fast packet
technology, which means that the protocol does not attempt to
correct errors. When an error is detected in a frame, it is
simply "dropped" (thrown away). The end points are responsible
for detecting and retransmitting dropped frames. (However, the
incidence of error in digital networks is extraordinarily small
relative to analogue networks.) |
|
Fax Transmission |
Transmitting fax over the mobile phone network using your mobile
handset. Your mobile phone could be used as a modem when
connected to your notebook or desktop computer, and even PDAs to
transmit such data. |
|
FYI |
“For your Information”, used in articles to give you extra
information about something of interest or importance. |
|
Fading |
Variation in channel performance
due to the dynamicity of the environment, which changes the
receive signal strength. |
|
FDMA |
Frequency Division Multiple Access |
|
FEC |
Forward Error Correction. A
technique used to overcome some type of errors created by
transmission on noisy channels, by adding redundancy bits to the
main data transmission. |
|
Frequency band |
A portion of the radio spectrum
delimited for a particular use. For example, most wireless LANs
currently use the 2.4 to 2.48 GHz band, although 5 GHz band
products are
on the way. A frequency band is usually divided in two channels. |
|
Frequency Reuse |
The ability to use the same
frequencies repeatedly across a cellular system, made possible
by the basic design approach for cellular. Since each cell is
designed to use radio frequencies only within its boundaries,
the same frequencies can be reused in other cells not far away
with little potential for interference. The reuse of frequencies
is what enables a cellular system to handle a huge number of
calls with a limited number of channels. |
