|GSM - 2G (European standard) |
|GSM (Global System for busy communication) is a digital officious telephone system that is widely used in Europe and an some other(prenominal) parts |
|of the world. GSM uses a variation of time division sixfold access (TDMA) and is the most widely used of the three digital |
|wireless telephone technologies (TDMA, GSM, and CDMA). GSM digitizes and compresses data, then sends it d aver a product line with two |
|other streams of user data, each in its own time slot. It operates at either the 900 megacycle per second or 1800 MHz frequency band. |
|GSM is the de facto wireless telephone standard in Europe. GSM has all over great hundred million users worldwide and is available in 120 |
|countries, according to the GSM MoU Association. Since many GSM network operators have roaming agreements with foreign |
|operators, users arse often continue to use their mobile phones when they travel to other countries. |
|American Personal Communications (APC), a subsidiary of Sprint, is development GSM as the technology for a broadband personal |
| communication theory service (PCS).
The service will ultimately have to a greater extent than 400 base stations for the palm-sized handsets that are |
|being make by Ericsson, Motorola, and Nokia. The handsets include a phone, a text pager, and an tell machine. |
|GSM together with other technologies is part of an evolution of wireless mobile telecommunication that includes High-Speed |
|Circuit-Switched Data (HCSD), General Packet radiocommunication System (GPRS), Enhanced Data GSM Environment (EDGE), and Universal Mobile |
|Telecommunications Service (UMTS). |
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