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ADSL
(Assymetrical Digital Subscriber Line) |
A method to increase transmission
speed in a copper cable. ADSL facilitates the division
of capacity into a channel with higher speed to
the subscriber, typically for video transmission,
and a channel with significantly lower speed in
the other direction. |
AMPS
(Advanced Mobile Phone System) |
The original
standard specification for analog systems. Used
primarily in North America, Latin America, Australia
and parts of Russia and Asia. |
analog system
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the simple way to transmit
speech. The first networks for mobile phones were
analog. Analog systems include AMPS, NMT and ETACS. |
asynchronous
|
A type of
transmission in which each character is transmitted
independently without reference to a standard clock.
Can also mean that there are different capacities
for data transfer in each direction, for example
the old 90/200 baud modems and the new ADSL. |
asynchronous mode
|
a standard for data transmission
where each data package has a start and stop bit.
See also synchronous mode. |
ATM
(Asynchronous Transfer Mode) |
A technology
for broadband transmission of high-capacity telecommunications
signals. In addition to high-capacity signal transmission,
ATM provides considerable flexibility, since the
individual subscriber is able to adapt the capacity
of a switched connection to current requirements. |
AXE |
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An open architecture, Ericsson’s
communications platform. A system for computer-controlled
digital exchanges that constitute the nodes in large
public telecommunications networks. The basis for
Ericsson’s wireline and mobile systems. |
bandwidth |
The information-carrying
capacity of a communications channel. Usually expressed
in Hertz (cycles per second) for analog circuits
and in bits per second (bps) for digital circuits. |
base station |
The central radio transmitter/receiver
that maintains communications with a mobile radiotelephone
with a given range. |
Bluetooth |
A radio technology
developed by Ericsson and other companies built
around a new chip that makes it possible to transmit
signals over short distances between telephones,
computers and other devices without the use of wires.
Read more at http://www.bluetooth.com |
bps |
bits per second - meaning data
transmission speed, the number of pieces of information
transmitted per second. |
broadband |
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This term
has a number of meanings. It was coined originally
to describe a channel with more bandwidth than a
standard voice grade channel which is usually a
48KHz link. |
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CDMA
(Code Division Multiple Access) |
A technology for digital transmission
of radio signals between, for example, a mobile telephone
and a radio base station. In CDMA, a frequency is divided
into a number of codes. See also IS-95. |
CDMA2000 |
Cdma2000 is a radio
transmission technology for the evolution of narrowband
cdmaOne/IS-95 to 3rd-generation adding up multiple carriers.
See also WCDMA for single carrier/direct spread technology. |
Cellular Mobile Telephone
System |
System where each geographic area
is covered by a base station. This area is known as a
cell. Each telephone in the cell communicates with the
base station. If the phone moves to another cell, the
call is automatically transferred to the base station
in the new cell. |
Circuit
Switching |
A switched circuit
is only maintained while the sender and recipient are
communicating, as opposed to a dedicated circuit which
is held open regardless of whether data is being sent
or not. |
coverage |
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the geographical reach of a mobile
phone network or system. |
D-AMPS
(Digital Advanced Mobile Phone System) |
Earlier designation
of American standard for digital mobile telephony used
primarily in North America, Latin America, Australia and
parts of Russia and Asia. Now known as TFMA. See also
TDMA and IS-136. |
DECT
(Digital Enhanced Cordless Telecommunications) |
A common standard for cordless personal
telephony originally established by ETSI, a European standardization
body. DECT is a system for cordless business communications. |
digital
|
where information
- speech, for example - is encoded before transmission.
Digital networks are rapidly replacing analog ones as
they offer improved sound quality, secure transmission
and can handle data as well as voice. Digital networks
include mobile systems GSM 900, GSM 1800, GSM 1900, D-AMPS
and the cordless DECT system. |
dual band |
dual band mobile phones can work
on networks that operate on different frequency bands.
This is useful if you move between areas covered by different
networks. For example GSM 900, GSM 1800. |
dual mode |
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dual mode mobile
phones work on more than one network (for example, TDMA
and AMPS, GSM and DECT). |
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EDGE |
A technology that gives GSMA and
TDMA similar capacity to handle services for the third
generation of mobile telephony. EDGE was developed to
enable the transmission of large amounts of data at a
high speed, 384 kilobits per second. |
EPOC |
An operating system
for mobile terminals, developed by Symbian (a joint-venture
with Ericsson, Matsushita, Nokia, Motorola and Psion). |
ergonomics |
Study of equipment design in order
to reduce user fatigue and discomfort |
ERMES
|
European Radio
Messaging System - a pan-European wide area paging network
working in Europe, the Middle East and Asia. |
ETACS |
Extended Total Access Communications
System - the analog mobile phone network developed in
the UK and available in Europe and Asia. |
ETSI
(European Telecommunications Standardization Institute) |
The European standardization
body for telecommunications. |
extranet |
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The extension of a company's intranet
out onto the Internet, e.g. to allow selected customers,
suppliers and mobile workers to access the company's private
data and applications via the World Wide Web. Generally
an extranet implies real-time access through a firewall
of some kind. |
Fast
Packet Switching |
An emerging, packet-orientated,
digital technology that differs from traditional packet
switching in a number of ways. The most obvious is that
it transmits all data in a single packet format whether
the information is video, voice or data. Fast packet switching
uses short, fixed length packets (cells) and - via hardware
switching - is capable of speeds between 100,000 and 1,000,000
packets/second. |
FCC
(Federal Communications Commission) |
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Regulatory body governing communications
technologies in the US. |
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