Yealink CP960 - Audio Settings; Volume

Yealink CP960 User Guide
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If the callee enables anonymous rejection feature, you may be prompted that the callee does not accept calls from an
anonymous number.
Related Topics
Enabling Anonymous Call
Rejecting Anonymous Calls Automatically
Answering Calls
When you receive a call, you can choose to manually answer it or answer it automatically.
Topics
Answering a Call