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The original first-generation cell phones were analog and designed for voice data only.

Cell phones are also known as cordless phones. The most common type of cell phone is the satellite phone. Conventional phone systems use digital signals. A coax cable is a network cable made up of wires twisted into sets of two and joined together into a single cable. TCP/IP is a protocol used to transmit data over the Internet.

On February 18, 2008, the FCC's "Analogue-to-Digital Conversion" directive will go into effect. This means all telephone companies will shut down their analog wireless services. Analog signal is a continuous signal that represents physical measurements. A digital signal is a discrete time signal generated by digital modulation.

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