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Cellular Telephones

Cellular telephones have become a popular tool for people who need to stay in touch while on the move. Cellular telephone combines radio and television technology with computer systems. As a caller moves from one geographical cell to another, computers in switching offices transfer calls among variously located antenna transmitters.

Cellular telephones operate like portable or cordless telephones. Unlike conventional wire-based cordless phones, cellular telephones are portable and do not require proximity to a jack to access the wire-based networks. The newest service for cell phones includes videoconferencing and Internet access and able to send e-mail. Cellular telephones are very popular for professionals and consumers as a way to communicate while away from their region, different from wire-based phones, while traveling or when in remote locations it’s useless. Cellular telephone achieves great market. Cellular phones have become an alternative communication tool.

Cellular telephones system work by transmitting radio signals to cellular towers. Cellular towers vary in their capability to receive cellular telephone signals. Some towers can receive signals from short distances up to 2 km, and others can receive signal from long distances up to 50 km. Cellular calls are picked up by the towers and relayed to other user of the conventional wire-based telephone network.