Can receive faxes but cannot send fax

[William012]

My Hp5275 is connected to an HP PC, a modem and  a router(with a fax line and a phone line) .

A year ago, I used to send and receive faxes.

Now, I can receive faxes but when I send a fax, it dials the number, then connects, sometimes displays "Page1 transfer..." and then interrupts whatever with the following message: "the fax number.elephone connection failed or there was a communication error with the sending fax machine".

I have tried the HP fax number (1-888-HPFaxme) with a similar result.

I ran the Fax Test Report and eveything is successful.

The Internet/ Phone provider  performed a test on the line and the fax line is working in both directions.

Thanks for your advice

[TEJ1602]

@William012, Welcome to HP Support Community!

Follow the steps below-

Redial the number and adjust sending settings

Confirm the following dialing requirements and fax settings to help identify issues when faxes do not send. Fax setup and preferences settings are in the Fax or Setup menus on the printer control panel.

• Manually dial the fax number: From the printer, dial the number as if you are making a phone call, including the area code, the access code such as '9' to connect to an outside line, and the long-distance country code. If dialing with speed dial, confirm the saved number has required pauses between numbers (adding a dash between 9 and the area code, for instance).

• Lower the fax speed: Select the slow or standard setting.

• Turn off Error Correction Mode: Turning off this feature can improve sending success when the phone line quality is poor, but the image quality of the received fax might be unsatisfactory. If this must be turned off to send faxes, have the phone service provider check the line quality.

• Send the fax in black and white: If a color fax cannot be sent, the receiving fax machine might not support the feature.

• Confirm the dialing type (tone or pulse): Most phone lines use tone dialing.

• Enable error reporting: Turn on the Fax Error Reports feature to print a report if an error occurs when sending or receiving a fax. If the report includes a numeric error code, go to Fax Error Codes and Solutions.

If the previous steps do not resolve the issue, reset the printer, check for any hardware related issues, and restore the default fax settings.

NOTE: 

Re-add any printer settings and preferences that were removed after a reset or settings restore.

• Reset the printer: With the printer turned on, disconnect the power cable from the rear of the printer and the wall outlet, wait 30 seconds, and then reconnect the power cable.

• Check the scanner bar functionality: Lift the scanner lid slightly, and then press the Copy button or icon to start a copy job. If the scanner light does not move or illuminate, the scanner mechanism requires servicing.

• Restore fax settings to default: Restore factory default fax settings, and then run the fax setup wizard again.

Hope this helps! Keep me posted. 

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