Glossary - Samsung SPH-A250 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 seen as 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.
Call Waiting - Ability to inform users that they have
an incoming call when engaged on
another call.
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Line Identification - Services allowing subscribers
Services (Caller ID to view or block the telephone
Display) numbers of callers.
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.
LED - (Light Emitting Diode) Commonly used to refer
to a small light on the wireless phone or on
the Desktop Charger. The LED lights on the
phone to indicate an incoming call. The lights
on the charger to indicate that battery
charging is taking place.
Prepend - The addition of a prefix, such as an area
code, to a phone number.
RF - Radio Frequency
Roaming - The ability to use a wireless phone to
make and receive calls in places outside
of the home service area.
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