Mitel 6867i Administrator's Manual page 339

MITEL WEB UI
1. Click on Basic Settings->Preferences->General.
2. In the "Call Waiting Tone Period" field, enter a time period, in seconds, that the call waiting
tone will be audible on an active call when another call comes in. Default is 0 seconds.
When enabled, the call waiting tone plays at regular intervals for the amount of time set
for this parameter. For example, if set to "30" the call waiting tone plays every 30 seconds.
When set to "0", the call waiting tone is audible only once on the active call
3. Click Save Settings to save your changes.
Operational Features
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