Maxon MX-7930, Руководство пользователя, Страница: 66 / 82

Miscellaneous
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Abbreviations and acronyms
pen if the radio signal is blocked by
obstacles such as high trees, hills or
buildings, or if you are inside a heavily
reinforced concrete building.
To remedy the situation move closer to
the nearest mast if possible or seek
higher ground. If you are inside a build-
ing, try moving towards a window.
What is roaming? Roaming is the tech-
nique that allows subscribers to move
from one cell to another or from one
network to another without affecting
the call.
What is digital? Early cellular phones
relied on analogue systems. Analogue
radio systems transmit the voice signal
in its original form, whereas digital
technology transforms the microphone
signal into number sequences (digits)
and transmit these. When received, the
digital signal is decoded so that you can
hear the sender’s voice. Digital signals
do not degrade in quality as long as the
data is received, and they can be com-
pressed to take up less memory.
What is Dual Band? A dual band cell
phone has the capability to automatical-
ly switch between frequencies and can
thus operate on two or more frequency
bands, e.g. 900 Mhz and 1800 Mhz.
What is GSM? Global System for Mobile
communications is the most widespread
standard for digital communication in
Europe, Australia and in large parts of
Asia and Africa. GSM uses frequencies in
the 900 and 1800 Mhz bands.
What is APN? APN stands for Access
Point Name and is basically an URL
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