Gigaset S820 User Manual page 32

Changing phone settings
Protection from anonymous callers
You can set your telephone so that anonymous calls (where the caller has suppressed calling line
identification) are either rejected or only appear in the display.
The setting applies for all registered handsets and the base.
Menu key v ¤
Settings menu page
¤
Protection Mode
¤
No Protection: No protection from anonymous calls.
Or:
¤
Silent Call: Your telephone does not ring and the call is shown on the display.
Or:
¤
Block Call: Your telephone does not ring and the call is not displayed.
Blacklist
If the blacklist function is activated, calls from blacklisted numbers are either rejected or only
appear in the display.
The setting applies for all registered handsets and the base.
Editing the blacklist
Menu key v ¤
Settings menu page
¤ ¤
New Entry Enter the number.
Or:
¤ ¤
þ Delete entry.
Select entry
Activating/deactivating the blacklist
Menu key v ¤
Settings menu page
¤
No Protection: The blacklist is not active.
Or
¤
Silent Call: Your telephone does not ring and the call is shown on the display.
Or
¤
Block Call: Your telephone does not ring and the call is not displayed. 
The caller hears the busy tone.
Activating/deactivating music on hold
Music on hold for external callers can be activated/deactivated for consultation call and call
divert.
Menu key v ¤
Settings menu page
30
¤
1 Call Protection
¤
1 Call Protection
¤
1 Call Protection
¤
ì Audio Settings
¤
Anonymous Calls 
¤ ¤
Black List Blocked Numbers
¤ ¤
Black List Protection Mode
¤
Music on Hold on/off