Gigaset 551HX Manual page 36

Protection against unwanted calls
Only put through known callers
(not on all bases
)
The system PIN is not 0000 (default).
Only callers entered in the directory are put through:
Settings
( = enabled)
When the function is enabled, the
As soon as one of your contacts changes his or her number, this number must also be
changed in the directory. Otherwise you will no longer receive calls from this
contact.
Black list
When the black list function is activated, calls from black list numbers are not indicated or are
only indicated in the display.
The black list is enabled (denoted by
as the protection mode. It is enabled automatically with the first entry.
Setting the protection mode
Settings
Protection Mode
No Protection
Silent Call
Block Call
Save settings:
36
OK Telephony
icon is shown on the display.
in the menu) when Silent Call or Block Call is selected
OK Telephony
OK select desired protection
All calls are indicated, including from callers whose numbers are on
the black list.
The telephone will not ring and the incoming call will only appear in
the display.
The telephone will not ring and the incoming call will not appear in
the display.
Save
Availability and operation of the functions
may differ on your telephone.
OK Just Friends
OK Blocklist
Change
OK