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 GSM Mobile Phones
GSM technology has progressed to the point where it is being used in
almost all countries including U.S.A & Japan & facilitates easy roaming.
Countries like the U.S.A have networks now based on GSM but instead of
900MHz they operate at 1800MHz and 1900MHz.GSM service started in 1991. It
was also renamed to Global System for Mobile communications (GSM). GSM
initially stood for Group special Mobile, the CEPT (Conference of European
Posts & Telegraphs) formed this group to develop a Pan-European cellular
system to replace the many systems already in place in Europe that were
all incompatible.
GSM was taken over in 1989 by the ETSI (European Telecommunications
Standards Institute) and they finalised the GSM standard in 1990. GSM
cellular phones use a combination of Time and Frequency Division Multiple
Access. The Memorandum of Understanding has over 210 members from approx
105 countries and meets regularly to look at new or better implementations
to the GSM system. A gsm phone uses a Subscriber Identity Module (SIM)
smart card that contains user account information and becomes immediately
programmed after inserting a SIM card.
 What is GSM?
GSM is an open, non-proprietary system that is constantly evolving. One of
its great strengths is the international roaming capability. This gives
consumers seamless and same standardised same number contactability in
more than 170 countries. GSM satellite roaming has extended service access
to areas where terrestrial coverage is not available.
What is technically distinctive about the technology?
GSM differs from first generation wireless systems in that it uses digital
technology and time division multiple access transmission methods. Voice
is digitally encoded via a unique encoder, which emulates the
characteristics of human speech. This method of transmission permits a
very efficient data rate/information content ratio.
World GSM
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The Wireless Evolution is achieved through the GSM family of wireless
technology platforms - today's GSM, GPRS, EDGE & 3GSM. GSM is a living,
evolving standard - growing and adapting to meet changing customer needs.
It is the basis of a powerful family of platforms for the future -
providing a direct link into next generation solutions including GPRS
(General Packet Radio Services) EDGE (Enhanced Data for GSM Evolution) and
3GSM.
 What is Multimedia Messaging?
Multimedia messaging is a next generation message service.
Multimedia messaging allows a variety of message elements to be sent to a
user and these can contain text, animations, photographs, sounds and in
future streaming audio and video. Users can compose their own messages,
receive rich content messages from content providers and forward them onto
their own contacts.
GSM EDGE Technology
Further enhancements in data capability over the core GSM network will be
provided with the introduction of Enhanced Data rates for GSM Evolution -
known as EDGE*. This will achieve the delivery of advanced mobile services
such as the downloading of video and music clips, full multimedia
messaging, high-speed colour Internet access and e-mail on the move.
EDGE (or Enhanced Data Rates for Global Evolution) is a 3G technology that
delivers broadband-like data speeds to mobile devices. It allows consumers
to connect to the Internet and send and receive data, including digital
images, web pages and photographs, three times faster than possible with
an ordinary GSM/GPRS network. EDGE enables GSM operators to offer
higher-speed mobile-data access, serve more mobile-data customers, and
free up GSM network capacity to accommodate additional voice traffic.
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