The HP LaserJet 4345x mfp, HP LaserJet 4345xs mfp, and HP LaserJet 4345xm mfp
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.