-
1
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
-
1
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
- HP Community
- Printers
- Scanning, Faxing, and Copying
- Error 321 & 344. I am seeing these errors when I send faxes...

Create an account on the HP Community to personalize your profile and ask a question
05-05-2020 01:20 PM
Hi Community,
When I send even a short fax I receive error 321 & 344.
I have tried reducing fax speed, disabling ECM & changing out the fax cables.
Any other suggestions?
-kch
05-05-2020 02:09 PM
For those reading - Fax Error codes:
HP Fax Products - Fax Error Codes and Solutions
There are only a number of things to try on your side...
It is possible the phone line is not carrying the data - phone lines meant for voice transmission are pretty tolerant; there can be a lot of line noise and overall degradation, for example, before voice transmission fails. Data transmission, on the other hand, has tighter restrictions.
If you have another landline in your home / office, consider hauling the printer to that location, connecting everything, and trying that phone line.
In the USA, in so much that I am aware, the Fax Text number works to test your fax.
HP Printers and Fax Machines - Test Fax Setup with the HP Fax Test Service
References
Chapter 6 - Fax - starting on Page 62
Chapter 9 - Solve a problem > subsection Solve fax problems - Page 117
Reference and Resources – (More) Places to find help, solve problems, and learn how to use your Printer
Printer Homepage – “Things that are your printer”
NOTE: Content depends on device type and Operating System
Categories: Alerts, Access to the Print and Scan Doctor (Windows), Warranty Check, HP Drivers / Software / Firmware Updates, How-to Videos, Bulletins/Notices, Lots of How-to Documents, Troubleshooting, User Guides / Manuals, Product Information (Specifications), more
When the website support page opens, Select (as available) a Category > Topic > Subtopic
HP Officejet Pro 8600 Premium e-All-in-One - N911n
Thank you for participating in the HP Community Forum.
We are a world community of volunteers dedicated to supporting HP technology