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Contents
4 Multi-Tech Systems, Inc. MultiModem GPRS USB Wireless Modem User Guide
Band Options Overview ............................................................................................................................. 27
Changing the GPRS Band ........................................................................................................................ 27
Determining the Phone Number for the Wireless Modem ................................................................ 27
Examples of Useful AT Commands ..................................................................................................... 28
Verifying Signal Strength ........................................................................................................................... 28
Checking Network Registration and Roaming Status ........................................................................... 28
Checking the Modem’s Identity ................................................................................................................ 28
Establishing a Voice Call ........................................................................................................................... 29
Establishing a Circuit-Switched Data (CSD) Connection ..................................................................... 30
Answering a Circuit-Switched Data (CSD) Connection ........................................................................ 30
Using Short Message Services (SMS) ................................................................................................. 31
Sending a Short Message to a Specified Number ................................................................................. 31
Writing a Message to Memory .................................................................................................................. 31
Sending a Message from Storage ............................................................................................................ 31
Viewing a List of Stored Messages .......................................................................................................... 31
Reading a Stored Message ....................................................................................................................... 31
Deleting a Stored Message ....................................................................................................................... 31
SMS Examples ............................................................................................................................................ 32
Setting up Internet Access ................................................................................................................... 34
Connecting to the GPRS Network for Internet Access ......................................................................... 34
Before you Begin ........................................................................................................................................ 34
Setting the Access Point Name (APN) .................................................................................................... 35
Creating Your Dial-Up Connection in Windows Vista, XP, 2003, and 2000 ...................................... 36
Disconnecting .............................................................................................................................. ................ 36
Chapter 4 – Troubleshooting and Frequently Asked Questions ............................................ 37
Troubleshooting Examples ................................................................................................................... 37
Situation A: The modem does not answer ............................................................................................ 37
Situation B: The modem always returns «No carrier» when trying to originate a call ...................... 38
Frequently Asked Questions ................................................................................................................ 39
Appendix A - Environmental Information .................................................................................. 41
Waste Electrical and Electronic Equipment (WEEE) ......................................................................... 41
Instructions for Disposal of WEEE by Users in the European Union .................................................. 41
REACH Statement .................................................................................................................................. 41
Restriction of the Use of Hazardous Substances (RoHS) ................................................................ 42
China ROHS ............................................................................................................................................ 43