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Chapter 4 – Troubleshooting and Frequently Asked Questions

Multi-Tech Systems, Inc. MultiModem CDMA USB Wireless Modem User Guide 29

I activated my modem but I can’t do anything with it. When I try to dial out, I get a NO CARRIER response.

• If you are receiving a NO CARRIER response, send ‘AT+CEER’ to check the reason for no carrier, then

check the number in the Reference Guide.

• Make sure the modem is registered and getting good signal: AT+CREG and AT+CSQ.

• Make sure the modem is activated and provisioned correctly.

I am trying to activate my Sprint modem. When I do the ‘AT+WIOTA=1’, I get an error of 1012 back.

• Please check with Sprint to make sure your ESN, MDN, and MSID are correct. Also, make sure that the

MDN and MSID were inserted correctly into the modem.

How do I originate a voice or data call?

• ‘ATD<number>;’ for voice call.

• ‘ATD<number>’ for data call.

Why does the modem answer and then do nothing?

• The modem is answering in voice mode.

• If you want to answer a data call, make sure the account has CSD service.

• You will need to set ‘AT+CICB=0’ to make the modem answer in data mode.

When I try to make a data connection by dialing to my analog modem from the wireless, why does the analog

modem answer and send tones, but never connect?

• Make sure you are using the correct dialing string. You must send ‘ATD<number>’ for a data call.

• Make sure the account has CSD service.

How do I get the voice portion to work so that I can talk to others?

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

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

handset.

• Verizon modems currently do not support voice.

When I try to make a data call using ‘ATD<number>’, I get a NO CARRIER response.

• Check ‘AT+CEER’ for NO CARRIER reason and look it up in Reference Guide.

• Check the number that you are dialing.

• Make sure you have CSD service.

• Check registration and signal to make sure modem is registered and getting good signal: +CREG, +CSQ.

• Make sure you went through the activation procedures correctly.

How do I make a CSD dial-up connection in Windows to my ISP?

• Create a dial-up connection to the ISP’s access # and use the correct password and username.

• You must have CSD service.

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

• No, our CDMA modems do not support HSCSD.

The modem w

ill not answer.

• Set the modem to autoanswer 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 the modem to ignore DTR, ‘AT&D0’, if your system doesn’t provide DTR.

The modem answers, but does nothing.

• Modem is answering in voice mode.

• Voice: Need a voice cable; such as our “Y” cable.

• Data: Make sure you set ‘AT+CICB=0’ to make the modem answer in data mode.

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