If you press the callback, the phone will dial the Callback phone number.
To configure the Call Back via Web interface
1. Click Setting Features Callback .
2. Fill the Callback phone number.
3. Click
to save the configuration.
Call Waiting Tone
1. Click Setting Features
2. Select Call Waiting: On and Call Waiting Tone: On
To Change the Call Waiting Tone time via Web interface
1. Click Setting Tones