- a wireless transmission standard for digital cell phones, used worldwide
- a digital cell-phone system using this standard
Origin of GSMG(lobal) S(ystem for) M(obile communications)
Origin of GSMOriginally short for French Groupe Spécial Mobile, Special Mobile Group, now officially short for Global System for Mobile Communications.
- grams per square metre, (unit for measuring the weight of paper)
- (telecommunications) Global System for Mobile communications.
- (electronics) Groupe SpÃ©cial Mobile.
- (LGBT) Gender and/or sexual minority.
gsm - Computer Definition
(Global System for Mobile Communications) A digital cellular phone technology based on TDMA that started in Europe and migrated to other continents. GSM defines the entire cellular system, not just the TDMA air interface. In the early 1990s, GSM enabled roaming across European nations for the first time, and today, more than 1.5 billion GSM customers worldwide can phone each other via roaming agreements between the carriers. AT&T and T-Mobile offer GSM service in the U.S., while Rogers Wireless uses 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 Card GSM phones use a Subscriber Identity Module (SIM) smart card that contains user account information. Any GSM phone becomes immediately programmed after plugging in the SIM card, thus allowing GSM phones to be easily rented or borrowed. SIM cards can also be programmed to display custom menus for personalized services. Text and Data GSM includes the short messaging service (SMS) that enables users to send 160-character text messages to each other. It natively supports very slow data transfer at 9.6 Kbps; however, carriers have added higher data rate technologies. See GPRS, WCDMA, EDGE, HSCSD, GSM Association, GSA, TDMA, CDMA and PCS.