The display always shows phone off hook, The "fax line condition" test failed – HP Officejet 6600 e-All-in-One Printer - H711a H711g User Manual

The display always shows phone off hook, The "fax line condition" test failed | HP Officejet 6600 e-All-in-One Printer - H711a H711g User Manual | Page 109 / 216