Troubleshooting modem issues - ThinkPad

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Some of these steps may not apply to your computer. Test the modem after performing each step.

  1. Here are solutions to some common problems with using a dial-up modem to establish an Internet connection
  2. Resources for troubleshooting modem problems in Windows XP
  3. Verify that the modem line is connected to a RJ-11 phone jack
    RJ-11 modem port

    and not to a RJ-45 network port
    RJ-45 network connector
  4. Verify that the modem line is connected directly to a wall outlet.
    Eliminate any devices like a Telephone, answering machine, surge protector, or line splitter. Test with another phone cable and a different wall outlet, if available.
  5. Verify the presence of a strong dial tone on the same telephone line that modem is attempting to dial out on by connecting a telephone handset.
    Note: A no dial tone error message may be due to the software not handling a certain dial tone rather than a specific hardware fault. Around the world there is a variance in the signal quality of the dial tone which causes a report of no dial tone detection. Disable the dial tone detection to correct no dial tone detected by modem error.
  6. Verify that the latest driver has been installed properly.
    Check the version using the install instructions and readme from the software and device driver files for your ThinkPad system.
  7. Verify that no other software that accesses COM ports is running when the operating system loads (for example: fax software, synchronizing software for handheld devices, communication software, or external pointing devices that require a COM port).
  8. Verify that the latest BIOS and Embedded Controller when available for the ThinkPad system has been installed.
    Click here to view the latest BIOS files for all ThinkPad systems.
  9. Which modem should I use to connect to the Internet?
    You should always use your fastest modem to connect to the Internet. For example, if you have a broadband modem (Digital Subscriber Line [DSL] or cable) and a dial-up modem, use the broadband modem because it's much faster.


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