2 wire fax cord not working

[alifton]

I took the 4 wire phone cord from my phone and plugged it into the fax connection on the printer. I ran the Fax test and got the following message:

Fax Hardware Test - Passed

Fax Connected to Active Telephone Wall Jack - Passed

Phone cord Connected to Correct Port on Fax - Passed

Using Correct Type of Phone Cord with Fax - Failed

I then plugged in the 2 wire telephone cord into the printer and the other end into the wall jack. The printer could not detect an active line.  the printer is a OfficeJet Pro 6978

What am I doing wrong?

[sandytechy20]

@alifton

Welcome to the HP support community.

I understand that you are unable to setup fax, I am glad to assist you.

Confirm the fax cords are in the correct ports: The phone line should be connected to the 1-LINE port and an answering machine or phone should be connected to the 2-EXT port on the back of the printer.

Use the fax cord that shipped with your printer: HP fax-capable printers ship with a two-wire phone cord. If you are using a different cord, confirm the connector does not have four wires. Shorter, higher quality cords work better than longer cords of lesser quality.

Refer to this HP document for further assistance:- Click here

Keep me posted.

If this helps, please mark the public post as an accepted solution so that it benefits several others.

Cheers.