HP LaserJet M4345 Multifunction Printer series - Manual (Page 269)

Telecom statement
The HP LaserJet M4345x, HP LaserJet M4345xs, and HP LaserJet M4345xm models have the HP
LaserJet Analog Fax Accessory 300 already installed to provide communication to the public switch
telephone network (PSTN) for fax functionality. See the HP LaserJet Analog Fax Accessory 300
User Guide for all regulatory approval information and regulatory notices associated with the fax
functionality and that device.
ENWW Telecom statement 257