Yealink SIP-T21 - Manual (Page 103)

Basic Call Features
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You can also configure a DSS key as a group pickup key via phone user interface or
web user interface. You can pick up a call by pressing the group pickup key directly.
Note
You can use anonymous call to block the identity and phone number from showing up to
the called party when you call someone. For example, you want to call to consult some
of the services, but don’t want to be harassed. Anonymous call is configurable on a
per-line basis. You can also configure the phone to send anonymous on/off code to the
server to activate/deactivate anonymous call on the server side.
Note
To configure anonymous call via phone user interface:
1. Press Menu->Features->Anonymous Call.
2. Press or , or the Switch soft key to select the desired line from the Line ID
field.
3. Press or to select Enable from the Send Anonymous field.
4. (Optional.) Press or to select the desired value from the Anonymous Code
field.
5. (Optional.) Enter the anonymous call on code in the Call On Code field.
6. (Optional.) Enter the anonymous call off code in the Call Off Code field.
7. Press the Save soft key to accept the change or the Back soft key to cancel.
Anonymous call is configurable via web user interface at the path Account->Basic.
Anonymous call is not available on all servers. Contact your system administrator for the
anonymous call on code and off code.
The directed call pickup code and group call pickup code are predefined on the system
server. Contact your system administrator for more information.
The call pickup code configured on a per-line basis takes precedence over that
configured on a global basis.