HP Officejet 350 All-in-One Printer - Manual (Page 197)

And requires this action: Has this meaning: This message:
Waiting for poll You have set up a document to
be polled from the fax loading
tray. No action is required. If you
need to send a fax or make a
copy, you can remove the
document temporarily, then
replace it when you are done.
Refer to "Sending a Fax to
Another Fax Machine Upon
Request (Being Polled)" in
chapter 2 for more information.
Waiting to dial
(fax number) The HP OfficeJet has tried to dial
the displayed fax number, but the
phone line is already in use. It
could be in use by a received fax
because the phone is ringing or
off the hook. No action is required. The HP
OfficeJet will wait until the
phone line is free, then dial the
fax number.