Brother MFC-T4500DW Online User's Manual page 506

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Problems > Set Dial Tone Detection
Set Dial Tone Detection
Setting the Dial Tone to [Detection] will shorten the Dial Tone detect pause.
1. Press [Settings] > [All Settings] > [Initial Setup] > [Dial Tone].
2. Press [Detection] or [No Detection].
3. Press .
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• Telephone and Fax Problems
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