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Chapter 3 – Using Your Wireless Modem 
Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide   
19  
 
Internet Access 
Internet access can be setup in Windows Dial-Up Networking (DUN) of the computer that the wireless modem is 
serving. Setup procedures will vary according to the type of wireless service provider used. To access Dial-Up 
Networking 
on your PC, go to Start > Settings > Network Connections
•  For GSM-without-GPRS, a circuit-switched data connection is used. The user can set up DUN to 
make a conventional V.32 modem connection to any terminating modem at the other end. The phone 
number specified in DUN can be one supplied by the wireless service provider or another phone 
number related to a different dialup modem service (e.g., a dialup modem service phone number from 
any commercial or private dialup network). 
•  For GSM-with-GPRS, a single DUN number is generally used by all of a wireless provider’s 
subscribers throughout its area of coverage; regional, nationwide, continental, etc. Rather than being 
a literal phone directory number, as in conventional DUN, this is a code that gives the modem Internet 
access.  
 
Connecting to the GPRS Network for Internet Access 
After you have inserted the SIM card and the modem is ready for use, you can establish an Internet connection 
through a Windows dial-up session. 
Note that your wireless provider will charge you for data usage. 
Requirements 
• 
One Multi-Tech wireless GPRS modem 
• 
The GPRS modem should have an active SIM card and must have GPRS services 
• 
The modem must be getting a proper signal and be showing a network registration through the wireless 
provider’s network 
• 
A PC running Windows XP or 2003 with the Multi-Tech drivers installed for your particular model 
The following instructions are for Windows XP SP2 and Windows 2003. Every PC may have slight 
differences which may cause the instructions to be different. Use these instructions as a guide to help you 
understand what is required to set up an Internet connection through your wireless service provider for all 
operating systems. 
Note: 
Cellular providers provide Internet services as part of your service plan. Multi-Tech recommends that if 
you plan on using large amounts of data, to sign up for an unlimited data service plan with your provider. 
Multi-Tech Systems, Inc. will not be responsible for any charges on your cellular bill. If you have any 
questions about billing, service plans, service charges, etc., please contact your provider for more 
information. 
Set the Access Point Name (APN) into the Modem’s Properties on Your PC 
In order for your GPRS wireless modem to connect to your provider’s network, you must tell the modem the 
Access Point Name (APN) to which it will connect. The APN is a server name that your account is setup on 
with your provider. Your APN will be given to you by your provider. Here are some well-known APNs: 
• 
Cingular Wireless: ISP.CINGULAR, or WAP.CINGULAR 
• 
Cingular Wireless (Formerly AT&T): PROXY, or INTERNET, or PUBLIC 
• 
T-Mobile: INTERNET2.VOICESTREAM.COM, or INTERNET3.VOICESTREAM.COM, or 
WAP.VOICESTREAM.COM 
• 
Rogers AT&T of Canada: INTERNET.COM 
Steps for Setting the APN 
1. 
Start by clicking on Start and then clicking on Control Panel
2. 
In the Control Panel, double-click on Phone and Modem Options
3. 
The Phone and Modem Options window appears. Click on the tab labeled Modems. Highlight the 
Multi-Tech wireless modem listed in the table and then click on Properties
4. 
Properties window for your modem will display. Click on the Advanced tab and you should see 
an Extra Settings box. In the Extra initialization commands text box, type:  
AT+CGDCONT=1,”IP”,”<APN>” 
For <APN>, type in the correct APN for your account. For example:  
AT+CGDCONT=1,”IP”,”ISP.CINGULAR” 
Click OK to close the modem Properties window. Then click OK to close the Phone and 
Modem Options 
window.