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Figure 2 <br /> CELL SITE SYSTEMS <br /> CELL SITES WITHIN CITIES <br /> F <br /> CITIES <br /> 4 I"OP <br /> -12-11.111,44"140;17#*.1110.44.. <br /> et"• • <br /> Aoh AIL <br /> ai -._fiIIIIIPJAV'igr,#- <br /> IHIGHWAY <br /> `r <br /> W* <br /> 01 I 01 I <br /> DETAIL tottipair <br /> LOCAL TELEPHONE �I�f` , <br /> uoeu.Er �� <br /> '' u ANTENNA SUPPORT STRUCTURE ra "ft. <br /> • . <br /> *swim <br /> • Q <br /> CENTCLCHING SYSTE HOUSEHOLD <br /> CELLULAR TELEPHONE <br /> CELL <br /> Each cell site within the system contains both transmitting and receiving antennas. Calls placed <br /> from a wireless phone or device are sent to a central computer switching system. The central <br /> switch completes the call by connecting it either to a conventional telephone through a land-based <br /> line, or to another mobile phone through the nearest antenna. As the mobile caller enters one cell <br /> and exits arrotherthe-caliis-transferre&between-the—ells. <br /> Antennas <br /> There are three general types of transmitting and receiving antennas used in the wireless <br /> communications technology. These include whip antennas, panel antennas, and dish antennas. <br /> While whip and panel antennas are used to transmit and receive radio waves carrying conversation <br /> signals, dish antennas provide the link between the central computer switching system and the <br /> various whip and panel antennas used throughout the mobile conversation. <br /> S <br /> 11 <br />