Test modem using HyperTerminal
To test the modem in HyperTerminal, follow these steps.
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Open Run or Search window
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Type in HYPERTRM
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Click on OK
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If you get the message that HyperTerminal cannot be found, click here or otherwise skip to next step
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Press the Escape Key
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Now you should have a blank New Connection in HyperTerminal.
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Type ATE1 (You may not see anything but type it anyways)
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Press Enter
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Screen should say OK
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Type AT&F&W
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Press Enter.
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Screen should say OK
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Type ATZ
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Press Enter
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Screen should say OK
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Type ATX3DT,18005721959 OR ATX3DT,18003506885 (try the ATX3DT,18005721959 if you can't connect, then exit HyperTerminal and repeat the above steps and try the ATX3DT,18003506885)
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Press Enter
NOTE: If it connects it will say connected at a certain speed and it will ask for a password and sign you off since you didn't enter a password. This is normal. If this happens then your modem is working. If it doesn't then either you have a hardware issue or a problem in your software somewhere. Try using the Software Troubleshooter if you still can't connect.