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Glossary
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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 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.
PIN (Personal Identification Number)
Security code that protects the phone 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.
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.