Chapter 4. Understanding broadband: addressing issues of capacity, speed and quality of service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igure 4.2: Fixed (wired)- and wireless-broadband technologies – speed versus mobility Fixed (wired) High Wireless Fibre (FTTH/FTTB) IMT-Advanced (4G) BROADBAND NARROWBAND Cable LTE Advanced WirelessMAN-Advanced xDSL Speed Fixed WiMAX Mobile IMT-2000 WiMAX Satellite (3G) UMTS CDMA2000 Wi-Fi EDGE PSTN GPRS (2G) Dial-up Low GPRS Low High Mobility Desktop Laptop computer Device computer Mobile phone Location Scenarios Home/office Global coverage Hotspots Hot zones Fixed Park and connect On the move Source: ITU. 90