What are the fax configuration requirements?

You must configure the fax time, date, and header settings to use the fax feature. Connect the telephone cable to the fax port on the product and to the wall jack. If using an answering machine, set the Rings to Answer to at least one ring more than the answering machine and select TAM mode. If using an extension phone, enable Extension Phone and select Fax/Tel mode.

From the official HP LaserJet Pro MFP M128 Multifunction Printer manual, page 42

Have a follow-up question?

Answers from the official manual.

Common questions