191
Glossary
190
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).
Java
Programming language generating applications
that can run on all hardware platforms, whether
small, medium or large, without modification. It
has been promoted for and geared heavily to the
Web, both for public Web sites and Intranets.
When a Java program runs from a Web page, it
is called a
Java applet
. When it is run on a
mobile phone or pager, it is called a MIDlet.
MMS (Multimedia Message Service)
A message service for the mobile environment,
standardized by the WAP Forum and the 3rd
Generation Partnership Program (3GPP). For
phone users, MMS is similar to Short Message
Service (SMS)-it provides automatic, immediate
delivery of user-created content from phone to
phone. The message addressing used is
primarily phone numbers, thus the traffic goes
from phone to phone. MMS also provides support
for e-mail addressing, so that messages can also
be sent by e-mail. In addition to the text content
of SMS, MMS messages can contain still images,
voice or audio clips, and also video clips and
presentation information.
Multi-party Calling
Ability to establish a conference call involving up
to five additional parties.
Phone Password
Security code used to unlock the phone when
you have selected the option to lock it
automatically each time it switches on.
