Cell Phones Glossary
Technology / Cell Phones Glossary
Electromagnetic Radiation: Waves of electrical and magnetic energy moving together through space. Also called electromagnetic energy.
Electromagnetic Spectrum: The collection of all electromagnetic energy arranged according to frequency and wavelength.
Electronic Serial Number (ESN): The unique identification number embedded in a wireless phone by the manufacturer. Each time a call is placed, the ESN is automatically transmitted to the base station so the wireless carrie . . . View Full Definition
Encryption: The process of encoding a message such as a digital phone signal to prevent it from being read by unauthorized parties.
Enhanced 911 (E911): 911 service becomes E911 when automatic number identification and automatic location information from a wireless phone is provided to the 911 operator. Reimbursement, or cost recovery, is du . . . View Full Definition
Enhanced Data for GSM Evolution (EDGE): The final evolution of data communications within the GSM standard. Based on 8PSK modulation, EDGE provides 3G packet data throughput on GSM networks, and uses a new modulation scheme to ena . . . View Full Definition
Enhanced Specialized Mobile Radio (ESMR): Digital SMR networks that provide dispatch, voice, and messaging and data services.
European Telecommunications Standards Institute (ETSI): A standards-setting body in Europe. Also the standards body responsible for GSM.
F PCS Block: The final PCS license that was auctioned by the FCC in January 1997. Each contains 10 MHz of spectrum in the 1900 MHz band and is based on BTA geographic partitions. The licenses were reserv . . . View Full Definition
Federal Communications Commission (FCC): The federal government agency located in Washington, D.C. responsible for regulating telecommunications in the United States, including commercial and private wireless spectrum management.
Fiber Optic: Using fine, transparent lines for the transmission of data, digitally encoded into pulses of light. In terms of telephone conversations, a 1-2 copper cable can transmit about 25 conversation . . . View Full Definition
FireWire: Originally developed by Apple, this is an increasingly popular and very fast external bus for transferring data between devices; also known as IEEE 1394 for the name of the standard it engendered.
Flash Memory: A component used for memory that can retain information without power.
Foliage Attenuation: Reductions in signal strength or quality due to signal absorption by trees or foliage obstructions in the signal's line-of-sight path. For example, 800 MHz systems are seldom deployed in for . . . View Full Definition
Frame Relay: Wideband, packet-based interface used to transmit bursts of data over a wide-area network. Seldom used for voice.
Frequency: The number of oscillations, or vibrations, of radio waves per unit of time, usually expressed in either cycles-per-second or Hertz (Hz).
Frequency Modulation (FM): A signaling method that varies the carrier frequency in proportion to the amplitude of the modulating signal.
Frequency Reuse: The ability to use the same frequencies repeatedly across a cellular system, made possible by the basic design approach for cellular. Since each cell is designed to use radio frequencies onl . . . View Full Definition
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