HP LaserJet Enterprise 700 - Solve product software problems (Mac OS X)

Does your phone line have a call-waiting feature?
If the fax telephone line has an activated call-waiting feature, a call-waiting notice can interrupt a fax call in
progress, which causes a communication error. Ensure that a call-waiting feature is not active on the fax
telephone line.
ENWW Solve fax problems 283