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snom 821 User Manual Customizing the Phone Settings
Call waiting
When you are in a call, another call coming in will be announced visually by the symbol of a ringing
phoneon the display and acoustically by the sound of a double beep; you will also see the caller`s ID
on-screen if it is being transmitted. You can switch to visual or acoustic announcement only or turn
call waiting off on the phone’s web interface.
The default setting is "on", which means that waiting calls are announced both acoustically and visually.
See "Call waiting" on page 49 on how to use this feature.
Changing the setting:
1. Open the phone's web interface, Advanced > Audio > Call Waiting Indication.
2. To turn call waiting off, select "off" from the drop-down menu. Select "visual only" or "ringer" if you
want waiting calls announced only by the "phone ringing" symbol or the double beep, respectively.
3. Click on "Apply" and "Save".
Hiding my caller ID
With this setting your phone number will not be transmitted to any phones you call. Please note that
your call may not be accepted if the other phone is set to reject anonymous calls (see next item).
1. Open the phone's web interface, Preferences > Privacy Settings > Suppress own number (CLIP/
CLIR).
2. Select the radio button "Hide" .
3. Click on "Apply" and "Save".
Rejecting anonymous calls
With this setting you will not receive calls from phones whose number is not shown on your display.
Anonymous callers will hear the busy signal.
Please note that calls from analog phone connections will, most likely, be received as anonymous calls.
1. Open the web interface, Preferences > Privacy Settings > Reject incoming anonymous calls.
2. Select the radio button "Reject".
3. Click on "Apply" and "Save".
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