I didn't see a response from my first post, so I will assume that this IS a 4-line corded phone of the model you mentioned.
If that is the case, I have a link to the Electronic (PDF) version of the manual for you below.
MOST computers have a built-in PDF viewer program, so clicking the link above should display the manual on your screen.
But if you need such a tool, I have a link to where you can get a program like that at no cost. Just make sure you uncheck any "optional offer" you might see BEFORE clicking the "Install Now" button.
Click Here --> https://get.adobe.com/reader/
I hope this helps. Please let me know if you have any more questions.
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 "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, ***** *****