Samsung SGH-D418MSA User Manual page 104

Glossary
PIN (Personal Identification Number)
Security code that protects the phone/SIM
against unauthorized use. The PIN is supplied by
the service provider with the SIM card. It may
be a four to eight-digit number and can be
changed, as required.
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.
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 caches 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.
Roaming
Use of your phone when you are outside your
home area (when traveling for example).
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SDN (Service Dialling Numbers)
Telephone numbers supplied by your network
provider and giving access to special services,
such as voice mail, directory inquiries, customer
support and emergency services.
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.
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
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.
Glossary
on the phone, the
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