Cell Phone Frequencies

www.emfnews.org www.emfnews.org www.emfnews.org Cell phone frequencies are the frequency ranges within the Ultra High Frequency (UHF) band that are designated for cell phone use. Bluetooth devices, wireless networks, and television signals also use this frequency band. Although cellular phone systems divide cities and geographic areas into smaller cells of coverage, it allows for a fair amount of frequency reuse across the network. This ultimlately permits significantly more cell phone users to talk simultaneously on a network. How Are Cell Phone Networks Designed? Typically, a cell phone service provider is assigned up to 832 frequencies to use in a medium to large city. The carrier then divides the city into sub-cells that are normally 10 square miles and are covered by a low power base station, which is located in order to cover the entire cell. When cell users make a phone call within a cell on the network, they are assigned a duplex channel which permits two people to talk and listen simultaneously. On analog cell networks, this limits the number of users who can talk simultaneously to 56. With digital broadcast signals, three times as many people can talk at the same time (2G through 4G) making significantly more channels available for each digital cell. When calls are made from a cell network to a land-line, the call is switched to the land-based phone system through the given carrier’s Mobile Telephone Switching Office (MTSO). What Are Cell Phone Codes Used For …

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