HP C410 series User Manual page 155

Solution 2: Connect the telephone to the correct port
Solution:
NOTE:
a 2-wire phone cord in the box with the product, including: Argentina, Australia,
Brazil, Canada, Chile, China, Colombia, Greece, India, Indonesia, Ireland, Japan,
Korea, Latin America, Malaysia, Mexico, Philippines, Poland, Portugal, Russia,
Saudi Arabia, Singapore, Spain, Taiwan, Thailand, USA, Venezuela, and
Vietnam.
To send a fax manually, the telephone must be connected directly to the port labeled
2-EXT on the product, as shown below.
1 Telephone wall jack
2 Use the phone cord supplied in the box with the product
3 Telephone
For more information on setting up the product with your telephone, see the printed
documentation that came with the product.
Cause: The telephone used to initiate the fax call was not connected directly to the
product or was not connected properly.
If this did not solve the issue, try the next solution.
Solution 3: Start sending the fax within 3 seconds of hearing fax tones
Solution: If you are sending a fax manually, make sure that you press Start Fax
within three seconds of hearing the recipient's fax tones, otherwise the transmission
might fail.
Cause: You did not press Start Fax within three seconds of hearing fax tones.
If this did not solve the issue, try the next solution.
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This possible solution applies only in the countries/regions that receive
Fax troubleshooting 153