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Topic: GSM

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  Global System for Mobile Communications - Wikipedia, the free encyclopedia
GSM differs significantly from its predecessors in that both signalling and speech channels are digital, which means that it is seen as a second generation (2G) mobile phone system.
GSM retained backward-compatibility with the original GSM phones as the GSM standard continued to develop, for example packet data capabilities were added in the Release '97 version of the standard, by means of GPRS.
GSM is a cellular network, which means that mobile phones connect to it by searching for cells in the immediate vicinity.
en.wikipedia.org /wiki/GSM   (1804 words)

GSM provides on-site consulting services during drilling and completion operations and engineering and management in pressure control and relief well operations.
GSM is the oldest internationally recognized firm of registered consulting Petroleum Engineers specializing in field operations.
GSM has been involved in special projects at the request of governmental agencies as well as private industry.
www.gsm-inc.com   (181 words)

 USS Clueless - GSM 3G
GSM also included a very powerful set of features above that, and included some interesting features not directly associated with the RF link, such as a personality module which contained a customer's phone number and billing information that could be moved to another phone any time the customer wished to.
GSM was clearly superior to IS-136 or such abortions as IDEN (a Motorola design which never became an industry standard because Moto was never willing to license it, which meant that systems which adopted it could only get infrastructure and handsets from Motorola).
GSM has many features which are marvelous, but they can eventually be grafted onto IS-95 and CDMA2K, because they're all implemented at high protocol levels or don't have anything to do with the RF link.
denbeste.nu /cd_log_entries/2002/10/GSM3G.shtml   (4549 words)

 GSM Phone Information
GSM uses a variation of Time Division Multiple Access (TDMA) and is the most widely used of the three digital wireless telephone technologies (TDMA, GSM, and Code Division Multiple Access (CDMA).
GSM digitizes and compresses data, then sends it down a channel with two other streams of user data, each in its own time slot.
GSM is the de facto wireless telephone standard in Europe.
www.gsmphone.us   (464 words)

 GSM 900   (Site not responding. Last check: 2007-10-22)
GSM is a digital wireless communication protocol for mobile phones and was developed in the early 1980's to eliminate certain problems with the existing cellular networks:
After 2 years, the first GSM network was operable in 1992 in Finland, and since then GSM has been a huge success [1].
GSM 900 and it's variants are currently being used in more than 168 countries across the globe.
www.eecg.toronto.edu /~nazizi/gsm   (436 words)

 GSM Glossary   (Site not responding. Last check: 2007-10-22)
A GSM receiver employs an adaptive equalizer to overcome the impact of non-ideal channel characteristics caused by multipath propagation.
A GSM phone is a GSM mobile phone that is designed to be mounted in a car, rather than carried by hand.
GSM mobile phones, because they transmit data in short time division multiple access (TDMA) bursts, are often believed to cause worse interference than other types of mobile telephone.
gsm.argospress.com   (1583 words)

 GSM Interception   (Site not responding. Last check: 2007-10-22)
GSM was one of the first digital mobile phone systems to follow the analog era.
Widely known problems with GSM's analog counter parts were the possibility of phone fraud through cloning phones and thus calling in someone else's expense, and the possibility of someone intercepting the phone call over the air and eavesdropping on the discussion.
The GSM system was supposed to correct these problems by implementing strong authentication between the MS and the MSC, as well as implementing strong data encryption for the over-the-air transmission channel between the MS and the BTS.
www.dia.unisa.it /ads.dir/corso-security/www/CORSO-9900/a5/Netsec/netsec.html   (6570 words)

 Big LEO tables - GSM overview
As a result of this, the original and most widely-used GSM frequency implementation is also becoming known as GSM900, and DCS1800 is also known as GSM1800.
A detailed description of the GSM system can be found in [MOU92] and in [BJU95], in addition to the GSM recommendations.
GSM distinguishes between physical channels (the timeslot) and logical channels (the information carried by the physical channels).
www.ee.surrey.ac.uk /Personal/L.Wood/constellations/tables/gsm.html   (1834 words)

 GSM Security
GSM together with other technologies is part of an evolution of wireless mobile telecommunication that includes High-Speed Circuit-Switched Data (HCSD), General Packet Radio System (GPRS), Enhanced Data GSM Environment (EDGE), and Universal Mobile Telecommunications Service (UMTS).
GSM security issues such as theft of service, privacy, and legal interception continue to raise significant interest in the GSM community.
For an introduction to GSM technology, visit the GSM Tutorial from the International Engineering Consortium, Introduction to GSM from Performance Technologies, or the Overview of the Global System for Mobile Communications by John Scourias.
www.gsm-security.net   (282 words)

 Overview of the Global System for Mobile Communications   (Site not responding. Last check: 2007-10-22)
The signalling protocol in GSM is structured into three general layers [1], [19], depending on the interface, as shown in Figure 3.
GSM is also the first system to make extensive use of the Intelligent Networking concept, in in which services like 800 numbers are concentrated and handled from a few centralized service centers, instead of being distributed over every switch in the country.
GSM is a very complex standard, but that is probably the price that must be paid to achieve the level of integrated service and quality offered while subject to the rather severe restrictions imposed by the radio environment.
ccnga.uwaterloo.ca /~jscouria/GSM/gsmreport.html   (6509 words)

 GSM - a Whatis.com definition - see also: Global System for Mobile communication
GSM (Global System for Mobile communication) is a digital mobile telephone system that is widely used in Europe and other parts of the world.
GSM uses a variation of time division multiple access (TDMA) and is the most widely used of the three digital wireless telephone technologies (TDMA, GSM, and CDMA).
GSM has over 120 million users worldwide and is available in 120 countries, according to the GSM MoU Association.
searchnetworking.techtarget.com /sDefinition/0,,sid7_gci213988,00.html   (302 words)

 Mobile Phone Glossary - GSM (Global System for Mobile Communications)
GSM was built based on the TDMA protocol and is very popular in Europe and Asia.
GSM phones usually don't offer an analog capacity which would enable them to be used to make calls when the user is out of a digital cellular area.
Second generation GSM provides a short messaging service, SMS, that enables text messages up to 160 characters in length to be sent to and from a GSM phone.
www.ringnow.com /GSM.html   (285 words)

 Young Innovator: GSM Technology
The first commercial GSM services were launched in 1991 and after its early introduction in Europe, the standard went global in 1992.
Since then, GSM has become the most widely adopted and fastest-growing digital cellular standard, and it is positioned to become the world's dominant cellular standard.
Today, GSM technology is in use by more than one in ten of the world's population and growth continues to soar with the number of subscribers worldwide expected to surpass one billion by the end of 2003.
www.tdc.co.uk /competition/gsm.htm   (364 words)

 Introduction to GSM
Global System for Mobile Communication (GSM) is a set of ETSI standards specifying the infrastructure for a digital cellular service.
The IMSI is a unique non-dialable number allocated to each mobile subscriber in the GSM system that identifies the subscriber and his or her subscription within the GSM network.
When a GSM subscriber receives a phone call, the call attempt messages are routed to the subscriber's MSC, based on the dialed numbers (the MSISDN).
www.pt.com /products/gsmintro.html   (1591 words)

 Wireless Standards Technologies GSM
Call trace in GSM (ITtoolbox Wireless)- Call tracing is very useful for offline analysis of the messages exchanged between various network elements during a call.
Migration of GSM Networks to GPRS (ITtoolbox Wireless)- The aim of this paper is to understand the architecture of GPRS and focus primarily on the issues that come up while migrating from the existing GSM network to that of the GPRS.
GSM World- The GSM Association is the premier global body behind the world's leading wireless communications standard.
wireless.ittoolbox.com /nav/t.asp?t=427&p=427&h1=427   (1500 words)

 GSM 850 definition (Phone Scoop)
GSM 850 is simply GSM technology operating in the Cellular (800 MHz / 850 MHz) frequency band.
GSM 850 addresses the needs of carriers with Cellular licenses switching from other technologies to GSM.
Before the existence of GSM 850, the Cellular band was commonly referred to as the "800 MHz" band.
www.phonescoop.com /glossary/term.php?gid=115   (185 words)

 GSM Mobile Phones and Linux
GSM modems generally come with software packages, mostly designed for MS-Windows, and information on the Web usually states MS-Windows compatibility.
For the first generation GSM phones using CSD (Circuit Switched Data), normal serial speed is 9600 baud, with compression techniques said to increase to an effective 38400 baud.
If you are calling a conventional modem on the PSD network, the GSM network will convert your digital data stream to an analog one on the PSD, and the speed can then be limited by the called modem.
www.windclimber.net /linux/gsm-modem.pcgi   (1155 words)

 GSM Wireless Digital Cellular Phone Systems - and CDMA, handy's.
The GSM and other wireless systems are accessed using a handy, mobile phone, cellular phone, cellphone aka.
GSM is a global standard, GSM 900 being used in most european, asian and pacific countries, GSM 1800 being used in the same place to increase the capacity of the system, and GSM 1900 being used primarily in the US.
GSM speech signals are digitally coded: compression and error correction
www.geocities.com /henrik.kaare.poulsen/gsm.html   (314 words)

 The GSM 06.10 lossy speech compression library and its applications
GSM 06.10 is faster than code­book lookup algorithms such as CELP, but by no means cheap; to use it for real­time communication, you will need at least a medium­scale workstation.
Pulse3d is streaming GSM 06.10 audio to its real-time animated characters, along with the lip sync and and body animation information that makes them come to life.
Microsoft's GSM 06.10 CODEC is not compatible with toast's frame format - they use 65-byte-frames (2 x 32 1/2) rather than rounding to 33, and they number the bits in their bytes from the other end.
kbs.cs.tu-berlin.de /~jutta/toast.html   (5675 words)

 Golfalot Sports Marketing Website Design- Golfalot.com
Before embarking on any internet project, GSM will assist you in defining what the site is for, who it is aimed at and how it is promoted.
All GSM sites are renowned for their clarity and easy navigation and this is not just a happy coincidence.
Keeping your site up to date is crucial and GSM have created several sites that are updated by their owners remotely at the click of a mouse wherever they are in the world.
www.golfalot.com /marketing.shtml   (541 words)

 GSM Features
As many of you know, GSM is the only technology that supports the SENDING of SMS from the handset.
Having the phone ring and ring like that is hardly a great solution if you're at a meeting, and changing the forwarding wait time to 5 seconds (the minimum allowed) means you may not have sufficient time to answer those calls you do wish to receive.
As you may already know, there is a menu item available on GSM phones that determines whether your phone number will be shown on the call display units of people you contact.
www.arcx.com /sites/GsmFeatures.htm   (1613 words)

 GSM Testing
GSM technology dominates the wireless phone services as the technology of choice in most countries around the world.
With GSM options, it makes easy for you to quickly identify type of GSM traffic in each sub channel at a glance and monitor voice traffic in both directions (uplink and downlink) simultaneously.
TRAU (Transcoder/Rate Adaptor Unit) is required in GSM network to convert between the 16K GSM voice signal and standard 64K voice channel in the fixed-line telephone.
www.sunrisetelecom.com /mtt/gsm.shtml   (398 words)

The GSM codec, indeed most voice codecs used nowadays, compress the signal by modeling the human voice tract as a tube of varying cross-section excited by a series of pulse trains.
Reducing audio "buzz" in GSM cell phones - The pulse rate for GSM is within the audio band, and the dc current and RF energy readily convert into an objectionable audio "buzz" within the phone's circuitry.
In GSM networks the MMS service is generally implemented with the aid of GPRS service with is used to transport the actual messages to GSM phone.
www.epanorama.net /links/tele_mobile.html   (13932 words)

 IEC: Global System for Mobile Communication (GSM)
Global system for mobile communication (GSM) is a globally accepted standard for digital cellular communication.
GSM is the name of a standardization group established in 1982 to create a common European mobile telephone standard that would formulate specifications for a pan-European mobile cellular radio system operating at 900 MHz.
It is estimated that many countries outside of Europe will join the GSM partnership.
www.iec.org /online/tutorials/gsm   (135 words)

 Amazon.com: Books: GSM : Evolution Towards 3rd Generation Systems   (Site not responding. Last check: 2007-10-22)
One of the key factors for this exceptional performance is the constant evolution of the GSM system and its derivatives.
GSM: Evolution towards 3rd generation systems addresses new concepts in the GSM system, dealing both with standardized features as well as with theoretically and technologically feasible improvements which contribute to evolutionary changes in general.
Ongoing efforts in GSM standardization are focused on Phase 2+ with gradual additions for a fast and modular evolution.
www.amazon.com /exec/obidos/tg/detail/-/0792383516?v=glance   (718 words)

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