HP LaserJet Pro M521 HP LaserJet Pro MFP M521 - User Guide - Page 145

Security issues when connecting internal networks to public phone lines The product can send and receive fax data over telephone lines that conform to public switch telephone network (PSTN) standards. The secure fax protocols make it impossible for computer viruses to be transferred from the telephone line to a computer or network. The following product features prevent virus transmission: ● No direct connection exists between the fax line and any devices that are connected to the USB or Ethernet ports. ● The internal firmware cannot be modified through the fax connection. ● All fax communications go through the fax subsystem, which does not use Internet data-exchange protocols. Fax from the flatbed scanner 1. Place the document face-down on the scanner glass. NOTE: If documents are in the document feeder and on the scanner glass at the same time, the product processes the document in the document feeder and not the one on the scanner glass. 2. From the Home screen on the product control panel, touch the Fax button. 3. Use the keypad to enter the fax number. 4. Touch the Start Fax button. 5. The product prompts you to confirm that you are sending from the scanner glass. Touch the Yes button. 6. The product prompts you to load the first page. Touch the OK button. ENWW Use fax 131