When the HP LaserJet analog fax accessory 300 is installed, the MFP can function as a
standalone fax machine.
The HP LaserJet 4345x mfp, HP LaserJet 4345xs mfp, and HP LaserJet 4345xm mfp
models come with an HP LaserJet analog fax accessory 300 already installed. For the
HP LaserJet 4345mfp (base model), you can order this accessory as an option. See
for information about ordering the analog fax accessory.