Is the HP LaserJet Pro MFP M125 compatible with digital phone lines for faxing?

The printer is designed specifically for use with traditional analog telephone lines, and HP recommends using it on a dedicated analog phone line. For digital phone environments such as DSL/ADSL, PBX, ISDN, or FoIP, digital-to-analog filters or converters may be necessary. Contact your phone company to determine the best setup options, as compatibility with all digital services is not guaranteed. (Page 10)