Use fax on a DSL, PBX, or ISDN system
HP products are designed specifically for use with traditional analog phone services. They are not designed to
work on DSL, PBX, ISDN lines, or VoIP services, but they work with the proper setup and equipment.
HP recommends discussing DSL, PBX, ISDN, and VoIP setup options with the service provider.
The HP LaserJet product is an analog device that is not compatible with all digital phone environments
(unless a digital-to-analog converter is used). HP does not guarantee that the product will be compatible
with digital environments or digital-to-analog converters.