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08-27-2012 09:01 AM - last edited on 02-21-2017 10:51 PM by OscarFuentes
Fax error code 387 means that there is too much noise on the fax line for a good conenction. What kind of fax line are you using and does this happen regardless of who you are sending/receiving the fax to/from?
Also what is the exact model of your Officejet J6400 since the J6400 is the name of the series and there are several models (Example: J6480).
When a solution is found please mark the post that solves your issue.