Aastra 6755i User Manual page 241

3. The "Microphone Mute" field is enabled by default. The microphone is muted on the IP
phone for Intercom calls made by the originating caller. To disable this field, uncheck the box.
4. The "Play Warning Tone" field is enabled by default. If "Auto-Answer" is enabled, the phone
plays a warning tone when it receives in incoming intercom call. To disable this field, uncheck
the box.
5. The "Allow Barge In" field is enabled by default. If "Allow Barge In" is enabled, the phone
puts an active call on hold and answers the incoming Intercom call. To disable this field,
uncheck the box.
6. Click
Model 6755i IP Phone User Guide
to save your settings.
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