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Model 57i CT IP Phone User Guide 186
Additional Features
Configuring Suppression of DTMF Playback
Use the following procedure to configure suppression of DTMF playback.
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.
Aastra Web UI
Note: "Suppress DTMF Playback" is disabled by default.