ctrum, services. competito Second- and rs, and 4th-generation innovativ services e services, operate on PCS driving frequencies. prices down. UL: 890MHz to A cellular Standard used 915MHz digital in Europe, the technolog Far East, DL: 935MHz to y. The Israel, New 960MHz Zealand, and handsets Australia. Also can be used by T- used in all Mobile and countries AT&T Mobility that use in the United States. multiplexi Digital UL: 1.71GHz to DCS refers to Cellular 1.785GHz service higher- System (DCS) added frequency DL: 1.805GHz to 1.8GHz 1.88oGHz digital services in spectrum Europe. GSM for most is considered a existing DCS air carriers interface. and a few entrants. www.TechnicalPDF.com Enhanced UL: 806MHz to Nextel Nextel and Specialized 821MHZ (now part other SMR Mobile Radio of Sprint operators use (ESMR) DL: 851MHz to Nextel) 866MHz services technology operate developed by on these Motorola to frequenci support voice, paging, push- to-talk, and messaging on the same telephone. Also suitable for 4G service. *2.5- Many GSM generation mobile operators services deployed these (2.5G) packet data services in the interim to 3G. They use the same spectrum as GSM. This is a lower-cost solution than 3G but with less efficient spectrum utilization. Same as GSM, General Appropriates DCS, and PCS Packet voice channels Radio for data; 40- to Service 60Kbps. Enhanced Data speeds of about 110Kbps. Rates for Requires fewer voice channels Evolution for data than GPRS. *Third- 3G packs more generation services into a services given amount of spectrum than 2.5G technology. www.TechnicalPDF.com Table 7-6 3G Services and Spectrum Technology Frequencies Features Comments IMT-2000 More capacity for voice, Carriers bands: higher-speed data, launched value- acceptable video, low- added 3G UMTS: latency applications, and services to SO on. Standards bodies generate higher Uplink: have specified all of these revenues. 1.885GHz to frequency bands for 3G 2.025GHz services. CDMA2000 (in the 1xEV-DO (data United optimized) is States: always 1.7