1. Click on Basic Settings->Preferences.

2.Go to the "General" section.

3.Enable the "Suppress DTMF Playback" field by checking the check box. (Dis- able this field by unchecking the box). Default is disabled.

4.Click to save your settings.

Additional Features

Model 55i IP Phone User Guide 153

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Image 161
Aastra Telecom 55i IP Phone manual Click on Basic Settings-Preferences