Psion 2739D-7545MBW, User Manual

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Appendix G: Wireless Wide Area Network (WWAN) Settings
Tools Menu
G-7
Psion Omnii Hand-Held Computer User Manual
Use Virtual Serial Port
If Use virtual serial port is enabled, packet data connections are established through the virtual serial port
of the WWAN driver rather than through the WWAN driver directly. This check box should only be checked
if certain third-party VPN (Virtual Private Network) clients are used that do not work correctly otherwise.
The default setting is
disabled (unchecked).
Enable Automatic Configuration
In most cases, the data connection is configured automatically and no user interaction is required . This is
true even if multiple SIM cards from different operators are used with the same device. The connection pa-
rameters are adjusted automatically when a new SIM card is detected (this may require a warm boot). The
connection parameters are retrieved from a database.
Manual configuration should be necessary only if:
• One or more parameters in the database are incorrect or a new operator is not yet in the database.
(The database should be corrected for subsequent software releases.)
• An operator has assigned individual GPRS user names and passwords.
• A very large site has its own APN. Such connections always have to be configured manually.
• A customer has subscribed for a static IP address. By definition this must be configured manually.
• An operator may use a different APN for certain groups of customers. Since the automatic configura-
tion can configure only one APN per operator such connections have to be configured manually.
Profiles
In the following section, all the parameters that need to be configured for a connection (such as APN, user
name, password, DNS server addresses etc.) are referred to as a ‘profile’. Every profile is identified by an ar-
bitrary, unique name. The profile named
Default is special in that it is always present and can neither be
edited nor deleted. The Default profile uses parameters from a built-in database. The home network (the
network that issued the SIM) is used for the database look-up. While there can be many configured profiles,
only one profile can be active at any time.
If connection profiles are configured manually, the Enable automatic configuration check box should nor-
mally be unchecked.
In one particular use case, manually configured profiles may be combined with automatic configuration. If
multiple SIM cards are used with the same device, each SIM card being from a different operator and some
or all of them requiring a manually set up profile, automatic configuration may be used to automatically
pick the correct manually configured profile for each SIM card. For this to work, each profile must be config-
ured while the corresponding SIM card is inserted in the device and initialized (i.e. the status is at least
Searching for network ).
The Select profile: drop-down list in the data configuration profile selects to which profile a subsequent
action applies. A profile named Default is always present and contains the current parameters from the da-
tabase. The following actions are available:
Show
The parameters for the selected profile are displayed when you tap the stylus on this button. For the
Default profile, the publicly known password is shown—otherwise, the password is hidden.
Important: Automatic connection mode should not be used if applications other than the
Wireless WAN user interface (e.g. Connection Manager) are expected to open and
close connections.
If the automatic connection mode is enabled and another application closes the
GPRS connection, the WWAN user interface will immediately try to re-establish
the connection.
Note: The connection setup takes longer through the virtual serial port.