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R R e e f f e e r r e e n n c c e e I I n n f f o o r r m m a a t t i i o o n n
Emergency Calls
Important! This phone, like any cellular phone, uses
radio signals, cellular and landline
networks, as well as user-programmed
functions that cannot guarantee
connection in all conditions. Therefore,
you should never rely solely on any
cellular phone for essential
communications (medical emergencies
for example).
Remember, to make or receive any calls, the phone
must be switched on and in a service area with
adequate cellular signal strength.
Emergency calls may not be possible on all cellular
phone networks or when certain network services
and/or phone features are in use. Check with local
cellular service providers.
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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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