Glossary
196
Proxy Server
A proxy server resides between a Web client, such as a web
browser, and a real Web server and acts as an intermediary
between them. When some people browse a web site, their
browser is not actually connecting to the web server. The
request from their browser goes to a proxy server, and the
proxy server makes the request to the web server. A proxy
server can improve performance for groups of users because
it cache the results of all requests for a certain amount of
time. If a user requests a web page that it already loaded for
another user, it reloads the page instead of forwarding the
request to the Web server, which can be a time-consuming
operation.
PUK (PIN Unblocking Key)
Security code used to unlock the phone when an incorrect PIN
has been entered three times in succession. The eight-digit
number is supplied by the service provider with the SIM card.
Roaming
Use of your phone when you are outside your home area
(when travelling for example).
SIM (Subscriber Identification Module)
Card containing a chip with all the information required to
operate the phone (network and memory information, as well
as the subscriber’s personal data). The SIM card fits into a
small slot on the back of the phone and is protected by the
battery.
Glossary
197
SMS (Short Message Service)
Network service sending and receiving messages to and from
another subscriber without having to speak to the
correspondent. The message created or received can be
displayed, received, edited or sent.
Soft Keys
Two keys marked
and
on the phone, the purpose of
which:
●
varies according to the function that you are currently
using.
●
is indicated on the bottom line of the display just above the
corresponding key.
Tri Band
Ability to handle any of the following types of network; GSM
850, GSM 1800, combined GSM 850/ 1800 and GSM 1900
MHz bands, for greater call success and wider roaming.
Your phone automatically searches for the last network used.
If, for any reason, this network is unavailable, your phone will
attempt to register with a different network.
Voice Mail
Computerized answering service that automatically answers
your calls when you are not available, plays a greeting
(optionally in your own voice) and records a message.
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