Glossary
146
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.
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.
Service Charge - The amount paid each month to
receive wireless service.
Glossary
147
Standby Time - The amount of time a fully
charged wireless portable or transportable phone
can be on and idle without being in use. (See Talk
Time)
Talk Time - The length of time a person can talk on
a portable or transportable wireless phone without
recharging the battery.
Vocoder - Voice Coder. A device used to convert
speech into digital signals.
Wireless - Radio-based Systems that allow
transmission of telephone or data signals through
the air without a physical connection, such as a
metal wire (copper) or fiber optic cable.
