Using Wireless Manager
21
In some applications, it may be necessary to connect to GPRS by using Windows Dial-Up Networking
(DUN) instead. The following examples typically require a GPRS over DUN connection:
• Where a LAN proxy is in use for a corporate network connection and a separate proxy is required
for a GPRS connection. Windows can manage only one Web proxy across all LAN
connections, however individual proxies can be set up for each DUN connection.
• Where it is useful to initiate the connection from a Windows application rather than
in Wireless Manager.
Configuring a GPRS over DUN connection
Instead of dialling a conventional telephone number, GPRS connections are made by dialling the
code *99***1# to *99***10# as the telephone number. When the PC card processes this number,
it initiates a GPRS connection using the AT+CGDCONT command.
In Windows, each modem has an “extra initialization” string. This is typically used to store special AT
commands that initialize the modem. The commands are sent to the modem before the DUN connection
is established.
To configure a GPRS over DUN connection
1. From the Windows desktop, select
Start
Settings
Control Panel
Phone and Modem
Options
. The Phone and Modem Options dialogue box displays.
2. Click the
Modems
tab.
3. Select the Sony Ericsson GCxx modem and click
Properties
. The Modem Properties dialogue
box displays.
4. Click the
Advanced
tab.
5. In the
Extra initialization commands
field, type the following command:
AT+CGDCONT=
<connection_ID>
,”IP”,”
<APN>
”
where
<connection_ID>
is the connection ID for your connection, and
<APN>
is the access
point for your service.
For example,
AT+CGDCONT=3,“IP”,“MyCompanyAPN”
Note:
Using CID 3 prevents the CID from being overwritten by Wireless Manager.
6. Click
OK
. The Phone and Modem Options dialogue box displays.
7. Click
OK
.
8. From the Windows desktop, select
Start
Settings
Control Panel
Network
Connections
.
This example uses GPRS Context 3. There are 10 possible contexts supported by your Sony Ericsson
PC card (1..10). Context ID 2 is reserved for use by connections created by the Wireless Manager.
Refer to the AT Command Manual or contact your service provider or network administrator
for further assistance.
To define a Windows DUN Connection
1. From the Windows desktop, select
Start
Settings
Control
Panel
Network
Connections
.
The Phone and Modem Options dialogue box displays.
2. Select
File
New Connection
.
The New Connection Wizard starts.
3. Click
Next
.
4. Select
Connect to the Internet
, and then click
Next
.
