Mitel 6863i - Play Call Waiting Tone

Mitel 6863i SIP Phone Release 4.0.0 SP1 User Guide
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PLAY CALL WAITING TONE
You can enable or disable the playing of a call waiting tone when you are on an active call and
a new call comes into the phone.
You can configure this feature using the Mitel Web UI.
CONFIGURING CALL WAITING TONE
1. Click on Basic Settings > Preferences > General.
2. A call waiting tone is enabled by default. If required, disable the Play Call Waiting Tone
field by unchecking the check box.
3. Click Save Settings.
MITEL WEB UI