What Type Of Phone Line Are You Using - HP MFP Analog Fax Fax Manual

Note
30 Chapter 3 Troubleshooting

What type of phone line are you using?

Dedicated line: A standard fax/phone number assigned to receive
or send faxes.
PBX system: A business-environment phone system. Standard
home phones and the fax accessory use an analog phone signal.
PBX systems are digital and are incompatible with standard phones
and with devices such as the fax accessory. You need to have
access to a standard analog phone line to be able to send and
receive faxes.
Roll-over lines: A phone system feature where a new call "rolls
over" to the next available line when the first incoming line is busy.
Try attaching the fax accessory to the first incoming phone line. The
fax accessory will answer the phone after it rings the number of
times set in the rings-to-answer setting. (See "Setting
rings-to-answer" on page 16.)
Roll-over lines can cause problems with the fax accessory's ability to
receive faxes. Using roll-over lines with this product is not recommended.
ENWW