Contents
4 Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide
Chapter 3 – Using Your Wireless Modem ................................................................................. 17
Obtaining a Phone Number for the Wireless Modem ......................................................................... 17
Checking Signal Strength and Network Registration ........................................................................ 17
Before You Begin ........................................................................................................................................ 17
Downloading the AT reference guide from the Multi-Tech website .................................................... 17
Verifying Signal Strength ........................................................................................................................... 17
Checking Network Registration and Roaming Status ........................................................................... 18
Checking the Modem’s Identity ................................................................................................................ 18
Establishing a Voice Call ........................................................................................................................... 18
Establishing a Circuit-Switched Data (CSD) Connection ..................................................................... 19
Answering a Circuit-Switched Data (CSD) Connection ........................................................................ 19
Using Short Message Services (SMS) .................................................................................................... 20
SMS Examples............................................................................................................................................ 21
Internet Access ......................................................................................................................................... 23
Connecting to the GPRS Network for Internet Access ......................................................................... 23
Chapter 4 – Troubleshooting and Frequently Asked Questions ........................................... 26
Troubleshooting Examples ..................................................................................................................... 26
Situation A: The modem does not answer .............................................................................................. 26
Situation B: The modem always returns «No carrier» when trying to originate a call ...................... 27
Frequently Asked Questions .................................................................................................................. 27
Appendix A – Cables ................................................................................................................... 30
Data Cable Diagram – No Voice ............................................................................................................. 30
Data Cable Diagram – with Voice ........................................................................................................... 31
Fused DC Power Cable Dimensions ....................................................................................................... 31
Appendix B – Regulatory and Compliance Information ......................................................... 32
47 CFR Part 15 Regulation Class B Devices ........................................................................................ 32
Industry Canada ........................................................................................................................................ 32
Waste Electrical and Electronic Equipment (WEEE) .......................................................................... 33
Instructions for Disposal of WEEE by Users in the European Union .................................................. 33
REACH Statement ..................................................................................................................................... 34
Restriction of the Use of Hazardous Substances (RoHS) ................................................................. 35
Information on HS/TS Substances According to Chinese Standards ............................................. 36
Information on HS/TS Substances According to Chinese Standards (in Chinese) ...................... 37
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