Are you using a surge-protection device?
A surge-protection device can be used between the wall jack and the fax accessory to protect the fax
accessory against electrical power passed through the phone lines. These devices can cause some fax
communication problems by degrading the quality of the phone signal. If you are having problems
sending or receiving faxes and are using one of these devices, connect the product directly to the
phone jack on the wall to determine whether the problem is with the surge-protection device.
Solve fax problems