HP 3050 Engine Comm error

Error could be caused by the fax machine that you are sending to.
So you can receive faxes, but can't send them. Is it just the one number that causes the error, or is it all faxes sent that cause the error?
What I like to do on fax troubleshooting calls, is to call the phone company that the site is using. Tell them that you are having fax problems, and ask them to test the line.

It's a communication error between the printer and the sender or the receiver.
Unplug the fax phone cord from the wall. Plug in a telephone into that outlet and see if you can make a phone call.
Plug your fax back in, and try it again.

There is a big chance this is a line problem, contact your phone line company before trying to fix or replace your Fax modem on the MFP.

Good Luck

The "sender's" fax machine is attempting to RECEIVE a fax. This happens because they don't have the document fully inserted into the scanner before dialing. (According to HP's error code listing for "comm error 242" - http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=buu02549) This is not a problem of a bad connection. Bad line condition codes are 223, 224 and most of the codes starting with 23.

These errors mean that the communications have failed, and can mean that the receiver at the other end has terminated the call prematurely.
If the problem occurs with the same destination, then the receiver fax may be the problem.
If the error persists try disabling ECM

I found a blog on the Ooma site that said this can be fixed by prefixing your fax send number with 99. There were several comments from people who tired this fix and it worked for them!

Hello sir ; Why don't try to replace a phone cable or check the wall jack.

reconnect your usb cable to printer to computer.then also try tochange that usb cable if pro remains.

nthemba- all the error codes you see indicates phone line condition or error at reciving fax's end. For more details you can refer to

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bpu02549&lc=en&dlc=en&cc=us&product=79477&rule=17804&lang=en

I succeeded by:
a) changing the Error Correction Mode (ECM) to OFF
b) disabeling V.34 option

steps for
a) Fax setup -- All faxes -- Error correction -- OFF
b) Fax setup -- All faxes -- V.34 -- disable