User's Manual

Chapter 5 — Connecting to the Internet
34 WWAN Communicator User’s Guide
About Connection Types
You can use WWAN Communicator to connect to the Internet and
automatically launch Pocket Internet Explorer.
Communicator includes a database of publicly defined connections. When
you start the application, Communicator looks for a publicly defined
connection for your network operator and makes this the default
connection.
If Communicator cannot locate a publicly defined connection for your
network operator, you need to create your own connection file before
connecting to the Internet for the first time. For help, see “Setting up a
Default Internet Connection for the First Time” on page 35.
The connection type you need to set up depends on the kind of service
your network operator provides. Consult your network operator to learn
what type of connection you should choose.
A CSD (Circuit Switched Data) connection is the typical form of data
transmission through circuit switching, like a dialup modem. As with voice
calls, network charges are based on the time spent in the connection.
In a PSD (Packet Switched Data) connection, information is split into
packets before transmission and reassembled at the receiving end. Radio
resources are used only when users are sending or receiving data, and thus
PSD connections typically occupy less bandwidth than CSD connections.
Users are charged for the amount of data sent and received.
For help with choosing and setting up a default Internet connection for the
first time, see the next section.