GSM


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GSM

(communications)
A digital cellular telephone technology that is based on time-division multiple access; it operates on the 900-megahertz and 1.8-gigahertz bands in Europe, where it is the predominant cellular system, and on the 1.9-gigahertz band in the United States. Derived from global system for mobile communications.

GSM

GSM

(Global System for Mobile Communications) A digital cellular phone technology that started in Europe. The GSM Association (GSMA) defines the entire cellular system for GSM as well as LTE phones. GSM uses the TDMA air interface, while LTE uses OFDM (see LTE).

In the early 1990s, GSM enabled roaming across European nations for the first time. Eventually more than three billion customers worldwide could phone each other via roaming agreements between the carriers. AT&T and T-Mobile offered GSM service in the U.S., while Rogers Wireless deployed GSM in Canada.

GSM operates in several frequency bands, including 900 MHz and 1.8 GHz in Europe and 850 MHz and 1.9 GHz in the U.S. and Canada. GSM's TDMA technology is based on a circuit-switched system that divides each 200 kHz channel into eight 25 kHz time slots.

The SIM Smart Card
GSM phones use a Subscriber Identity Module (SIM) card that contains user account information. Every GSM phone becomes immediately programmed after inserting the SIM card, thus allowing GSM phones to be easily rented or borrowed. See SIM card.

Text and Data
Text messaging (SMS) and data transfer were built into GSM, and data rates have continually increased over the years. See GPRS, WCDMA, EDGE, HSCSD, GSM Association, GSA, TDMA, CDMA and PCS.

Vive la Cellphone!


When GSM phones were introduced, they were reported to produce a deafening sound for hearing aid wearers and interfere with pacemakers. Swedish hospitals banned them. An Australian newspaper claimed a motorist set off his airbag with one, and most curious, in Paris, they were said to occasionally reset taxi meters to zero.


The SIM Card
The back of a GSM phone opens, and the tiny SIM card is inserted, as in this example from Europe's Amena cellphone service. The bottom view is the card outside the socket showing contact points.







Evolution of 3G Technologies
This chart shows the evolution of carrier technologies throughout the world as they move from standard cellphone services to high-speed data capabilities.
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"Our new website matches the sleek, intuitive design philosophy present in each of our GSM mobile phones.
Under the two contracts Nokia will supply Jiangxi MCC with Nokia GSM radio and core networks, including Nokia UltraSite base stations and Nokia MSS (MSC Server System) mobile softswitch.
Macalalag told shareholders GSM had thus recovered from the 'missteps' in the past and should be on a 'profitable' and 'durable' path in the years ahead.
The NetSurveyorWeb[TM] GSM system also identifies, segregates, and displays different GSM call types like Mobile Originated Call, Mobile Terminated Call, Mobile Originated SMS, Mobile Terminated SMS, Location Update, Incoming Handover, and Supplementary Services etc.
Time Division Multiple Access (TDMA) technique is used for transmitting signals in GSM narrowband.
The Enhanced Observed Time Difference (E-OTD) method is based on the installation of Location Measurement Unit (LMU) reference receivers within the context of the whole GSM network.
Nokia Siemens Networks' GSM solutions for smart devices builds upon its previously introduced Smart Networks concept for 3G, enabling operators' WCDMA/HSPA/HSPA+ smart device users to enjoy faster mobile broadband upload and download speeds, longer battery life and better coverage.
"Adding a GSM Module to the WARP Appliance significantly increases our addressable market," said Terry Atwood, PIKA's vice president of sales, marketing and customer care.
Ericsson (Nasdaq: ERIC) today confirmed that it has been selected as a successful bidder to acquire assets from the Carrier Division of Nortel's (OTCBB: NRTLQ) GSM business in the US and Canada following the conclusion of Nortel's recent auction.
Worldwide Computer Products News-11 March 2009-Zynetix introduces next generation maritime GSM platform and service(C)1995-2009 M2 COMMUNICATIONS LTD http://www.m2.com
Waitaki Biosciences has reported that the sourcing, processing and storage of their premium quality Greenshell Mussel Powder (GSM Total) have been key to doubled worldwide sales in the past two years.