Glossary - Samsung SCH-A562 User Manual

Glossary

Airtime: Actual time spent talking on the wireless
phone. Most carriers bill customers based on how
many minutes of airtime they use each month.
Antenna: A device for transmitting or receiving
signals. The size and shape of antennas is
determined, in part, by the frequency of the signal
they receive. Wireless phones and the base station
must have antennas.
Base Station: The fixed radio transmitter/receiver
that maintains communications with mobile radio
telephones within a given area. (Typically called a
cell or cell site)
CDMA(Code Division Multiple Access): A spread-
spectrum approach to digital transmission. With
CDMA, each conversion is digitized and then tagged
with a code. The mobile phone deciphers only a
particular code to pick the right conversation off the
air. The transmitted signal is just above noise level
across the available bandwidth.
Channel: Communications signals transmit along
paths called channels.
Codec: Compression & Decompression.
Deactivation: The process of rendering a wireless
phone inactive.
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DTMF(Dual-tone Multi-Frequency ): You send DTMF
signals when you enter numbers by pressing the digit
keys.
EVRC (Enhanced Variable Rate Codec): EVRC is a
new global standard for compressing and
decompressing voice signals. EVRC uses a lower bit
rate (the number of bits sent per second) than
existing CDMA vocoders, while providing significant
improvements in voice quality. This technology
enables your phone to provide superb voice quality
while benefiting from the ability to process more
cellular voice calls using less bandwidth than the
voice codecs in CDMA networks today.
Frequency: A measure based on time, as one or
more waves per second, in an electrical or light wave
information signal. A signal's frequency is stated in
cycles-per-second or Hertz (Hz).
Hands-Free: A feature that permits a driver to use a
wireless phone without lifting or holding the handset
- an important safety feature for automobiles,
tractors and most other motorized vehicles.
LCD (Liquid Crystal Display): Commonly used to refer
to the screen display on the wireless phone.
G G l l o o s s s s a a r r y y
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