HP Officejet Pro 8600 Plus (All-in-One) - Incoming Fax but mistakenly answer phone

Question

I have landline phone service.  On this line, I have multiple phones, an answering machine, internet service via wireless Uverse setup, and the HP Officejet Pro 8600 Plus as a fax.  It's also a printer/scanner - but that uses the wireless Uverse service.
The unit works as a phone, if I answer in fewer than 4 rings.  The answer machine picks up after 4 rings.  If a fax, the fax connects after 6 rings.  (Auto answer function is turned on.)  This works.
If I mistakenly answer a fax call with the phone that the HP 8600 is connected through, I can press: 1,2,3 and the fax will answer.  This works.
Problem: If I mistakenly answer a fax call from one of the other phones in the house (same phone line is ringing as before - but the phone is NOT the one through which the HP 8600 is connected) - 1,2,3, does NOT work.  If I rush to the HP 8600: pressing the "fax" button on the unit does not connect the fax call; nor does the HP 8600 give me the option to "Accept" the call, when the phone as been answered. 
Does anyone know what buttons to push to get the fax to connect when the phone line is answered at a phone?  Either at the answered phone OR if I can get to the HP 8600 when I hear the fax tone - buttons I can push on the HP 8600 to get it to respond to the fax tones coming in on the line?
Thanks to anyone who can help.

Answer 1

Hello Vandy73,
I see that this is your first visit with us here on the HP Forums.  Let me please take a moment to say "Welcome". 
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I see that you have some concerns when it comes to answering a fax call by accident from another phone.  Pressing the 1.2.3 on the fax is the proper way to remedy the issue when you answer from the fax, however this feature will not work from another phone.
I do realize that this is an inconvenience.  The only resolution would be to contact the sender of the fax and have them resend.
Thank you for your time.
Cheers,
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