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Set Telephone Line Compatibility for Interference and VoIP Systems

Problems sending and receiving faxes due to possible interference on the telephone line may be solved by reducing the modem speed to minimize errors in fax transmission. If you are using a Voice over IP (VoIP) service, we recommend changing the compatibility to Basic (for VoIP).

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  • VoIP is a type of phone system that uses an Internet connection, rather than a traditional phone line.

  • Telephone providers frequently bundle VoIP together with Internet and cable services.

  1. Press image [Settings]>[All Settings]>[Initial Setup]>[Compatibility].
    image
    If your machine displays the [All Settings] menu on the Home screen, skip the [Settings] menu.
  2. Press the option you want.
    • Select [High] to set the modem speed to 33600 bps.

    • Select [Normal] to set the modem speed to 14400 bps.

    • Select [Basic(for VoIP)] to reduce the modem speed to 9600 bps and turn off Error Correction Mode (ECM). Unless interference is a recurring problem on your telephone line, you may prefer to use this option only when needed.

  3. Press image.
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