Hewlett-Packard (HP)
Distinctive Ring (DRPD) - HP640 fax machine
I purchased HP640 fax machine. I was on the phone for three hrs., with three (3) different HP support techs and they couldn't help. I followed the booklet instructions and went to the Advanced setting and there is NO DRPD listed. DRPD is listed in BASIC setting, but when you call the fax number it ...