Hi again and thanks for that model number.
I have a link to the electronic (PDF) version of the manual below, and you MAY have to "highlight" the entire link and then right-click to view or SAVE the manual to your computer.
I did a check on "call blocking" and most of the information about doing that STARTS on page 47 of that manual.
But please let me know if you have any trouble either seeing the manual or following the steps list there.
I can help with most specific steps - if you need that.
If this has answered your question(s), please take a moment to rate MY service level (Excellent is my goal) so that I get credit for helping you with this question.
You should see some "smiley faces" or "stars" to do that, but please let me know if you do NOT see them (you may have to scroll UP or DOWN) or can not use them.
Thanks, ***** *****