Sony 500 User Manual

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Step by step
Privacy/security
66
Activating/deactivating "Do not disturb"
If you do not wish to take calls, you can activate do not 
disturb. Internal callers hear the busy tone, external cal-
lers are connected to another phone, which you can 
specify (contact your service personnel).
Activating
:
Open the idle menu 
Select and confirm the option shown.
Deactivating
:
Open the idle menu 
Confirm the option shown.
Do not disturb on?
Do not disturb off?
When you lift the handset, you will hear a special 
tone (continuous buzzing) reminding you that "Do 
not disturb" is activated.
Authorized internal callers automatically override 
the DND feature after five seconds.