Multi-Tech Systems MTCBA-G-U manual Frequently Asked Questions

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Chapter 4 – Troubleshooting and Frequently Asked Questions

Frequently Asked Questions

Which providers can I use?

Two major providers are T-Mobile and Cingular.

We are Cingular approved.

Does this modem support High-Speed Circuit-Switched Data (HSCSD)?

No, our GSM/GPRS modems do not support HSCSD.

The modem is answering, but seems to not be doing anything?

The modem is answering in voice mode.

If you are trying to make a data call, make sure the account has CSD service. You will also need the data number (separate number from the main phone number that is provided by the provider).

I am trying to make a data connection by dialing from my wireless modem to an analog modem. Why does the analog modem answer and send tones, but never connect?

To make a data call you must use the ATD<number> command.

Make sure the account has CSD service.

How do I get the voice portion to work so I can talk to others using the wireless modem?

You will need a cable that has the speaker pins connected to a speaker and microphone.

We have a “Y” cable that splits out to a RJ9 connector that can be used to plug into the receiver of a handset.

‘ATD<number>;’ will originate a voice call.

How do I make an Internet connection to my dial-up ISP?

Make sure you have CSD service.

Create a dial-up connection to the ISP’s access number, then use your account username and password and choose the wireless modem as the device.

How does faxing work?

GPRS modems support Class 1 and Class 2 Group 3 faxing.

You will need fax services setup on your account. You should receive a separate phone number for fax just like voice and data, and you must call the fax number for the modem to receive a fax.

You will also need fax software (we do not have working software). WinFax Version 10 has been tested with success.

I can’t make outgoing calls. I just receive a NO CARRIER response.

Make sure the antenna is connected and SIM is inserted correctly.

Check signal and registration: ‘AT+CSQ’ (10-31 is good), ‘AT+CREG?’ (0,1 is registered & 0,5 is roaming).

Check NO CARRIER reason with ‘AT+CEER’. Look up error code in Reference Guide.

The modem will not answer.

To have modem autoanswer, set modem with ‘ATS0=1’ and ‘AT&W’ to store the setting.

Send ‘ATA’ to the modem once the RING is indicated on the terminal screen.

You may need to set modem to ignore DTR, ‘AT&D0’, if you aren’t providing DTR.

I am trying to make a GPRS connection using a Windows dial-up session. It connects and then immediately disconnects.

Make sure the APN is configured in the modem correctly (The APN is provided by the provider).

Check the APN with ‘AT+CGDCONT?’ To make sure it is correct.

If no APN is inserted, then insert the correct APN using the command ‘AT+CGDCONT=1,”IP”,”<APN>”’ with HyperTerminal or add it into the “Extra Initialization Commands:” in the modem’s properties.

Make sure the APN is correct for your account.

When I try to establish a GPRS connection using Windows dial-up I get an error: “Hardware Failure”.

Check the modem to make sure it is installed and can be queried in the modem’s properties.

Make sure the com port is not being held by another application. Look for the TR light indication. If it is on, most likely another application is holding onto the port.

Make sure the dial-up connections maximum speed matches the modem’s properties maximum port speed.

Try rebooting the PC.

What is the maximum amount of characters I can use to send an SMS message?

Supports up to 160 characters maximum.

In PDU mode using 7-bit, the modem still supports 160 characters, but in 8-bit the modem will support only 70 characters.

Multi-Tech Systems, Inc. MultiModem GPRS USB Wireless Modem User Guide

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Contents MultiModem Gprs USB World Headquarters Revision History Date DescriptionTrademarks and Logos Technical Support Country By Email By PhoneContents Product Description Product Description SpecificationsFeatures ModelsBenefits/Features in Applications Application OverviewApplication Types Safety Package Contents Electrical Characteristics SpecificationsAntenna/RF Specifications Current RequirementsAT Command Reference Guides InterfacesLEDs Activation Installation Activate Your Wireless AccountInsert the SIM Card into the Holder Connect the Antenna and USB Cable Handset Connection OptionalAttach the Modem to a Flat Surface Optional Install the Modem Driver Part a for Windows XP/2003 Installing the USB DriverIntroduction Click on Install from a list or specific location Advanced Click Continue AnywayCompleting the Found New Hardware Wizard screen appears Part C for Windows XP/2003 Installing the Modem INF File Installing the Modem Driver in Windows Part a for Windows 2000 Installing the USB DriverPage Part B for Windows 2000 Associating PC Port with USB Driver Part C for Windows 2000 Installing the Modem INF File Using Your Wireless Modem Phone Number for the Wireless ModemExamples of Useful AT Commands Establishing a Circuit-Switched Data CSD Connection Answering a Circuit-Switched Data CSD ConnectionEstablishing a Voice Call Using Short Message Services SMS SMS Examples Send an SMS message to another SMS compatible deviceUsing Your Wireless Modem Requirements Internet AccessConnecting to the Gprs Network for Internet Access Modem Options windowDisconnecting the Connection Create Your Dial-Up Connection in Windows XP/2003Mobile PhoneTools Solutions for ‘no connection through serial link’ situation Troubleshooting Frequently Asked QuestionsTroubleshooting Examples Solutions for no carrier messageFrequently Asked Questions How do I send an SMS message to an email account? Wireless Modem Reference Information Reference InformationEtsi contact Appendix a Warranty and Repairs Multi-Tech Warranty StatementRepair Procedures for U.S. and Canadian Customers Replacement Parts Repair Procedures for International CustomersRepair Procedures for International Distributors Info@thesupplynet.comJuly
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