Error Code 325 ECM, 326 ECM, 327 ECM, 328 ECM on HP Officejet pro 8500 series

Error Code 325 ECM, 326 ECM, 327 ECM, 328 ECM are Fax errors.

Telephone line conditions are very poor.


Solution 1:

• Try to send the fax at a different time when telephone line conditions have improved. 

Solution 2:

• Disable ECM (Error Correction Mode). 
• Errors might still occur, and might result in a degraded image quality on the received page. However, the ability to send the entire document will be improved.