Yealink SIP-T23P User Manual page 109

To place an anonymous call:
1. Using the specific line on the phone to place a call to phone B.
The LCD screen of phone B prompts an incoming call from anonymity.
You can use anonymous call rejection to reject incoming calls from anonymous callers.
Anonymous call rejection automatically rejects incoming calls from callers who
deliberately block their identities and numbers from being displayed. Anonymous call
rejection is configurable on a per-line basis.
To enable anonymous call rejection 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 scroll to the Anon Reject field.
4. Press or , or the Switch soft key to select Enable from the Send Rejection
Code field.
5. (Optional.) Enter the anonymous call rejection on code and off code respectively in
the Reject On Code and Reject Off Code field.
Anonymous call rejection on code/ off code is used to activate/deactivate the
server-side anonymous call rejection feature when the user enables/ disables
anonymous call rejection feature on the phone
6. Press the Save soft key to accept the change or the Back soft key to cancel.
Anonymous call rejection is configurable via web user interface at the path
Account->Basic.
Basic Call Features
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