No dial tone. Can not fax or receive faxes. Tried several phone lines and wires.

Unplug your fax from the phone line. Plug in a phone. Dial tone? Yes? then either fax is bad or the phone wire is bad.

No dial tone? Phone line dead.

try connecting line 2 to a simple phone and chk for dial tone.

I want to make sure I understand this completely. You get no dial tone from the fax machine when hooked up to VOIP. In the past, was there an audible dial tone from the fax, or did it just dial silently and give you an error if there was no tone? When you said you got a dial tone by connecting a phone to the ext phone port of "the machine" did you mean the fax machine? If you get a dial tone by running a phone through the fax machine, then the line is good. I have used a fax machine over Sunrocket before they went defunct, which used the same technology base as Vonage - so it should work. If you used to get an audible dial tone when using the fax, and no longer do, and you are geting a dial tone on a regular phone that is connected to the ext. port of the fax machine, then the problem has to be in the fax machine itself, not the VOIP. If you can verify that, we can go from there.

Can you receive any faxes. Run a Fax Test from the Tools menu. Is the problem with only one fax receipient? (Check the phone number and make sure they are set to receive. I have dealt with one fax receipient where the call-waiting service caught the fax call.)

Does the Fax see a dial tone? If there is no dial tone, use a single line phone (corded) to listen for a dial tone at that jack. If there is no dial tone, check the incoming service for a dial tone. (If you have no dial tone at all, contact your service provider.) Try a new phone cable (2-wire RJ-11) Try calling the number from another phone line with the single line phone attached. If the phone doesn't ring with a new cable, check your wiring and then contact your provider. Is the signal analog or digital (the all-in-one is designed for digital)?

Go back through the fax settings and set it as directed in Step 2 here: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01458259&tmp_task=solveCategory&lc=en&dlc=en&cc=us&lang=en&product=3643612 . You need the fax error reporting setting.

Disconnect any items that are plugged into the 2-Ext port.

Try reinitializing the unit. Unplug the power cord with the unit on. Make sure that the phone cord is fully seated in the 1-Line port. Then reconnect the power cord.

Try resetting the all-in-one, this may require 2 people. With the printer on, unplug the power cord and wait at least 20 seconds. Press and hold # and 3 while plugging in the power cord. Release the buttons after the unit starts up.

If none of these steps help the unit may need service.

Cindy Wells

Plug a working phone into the jack that the fax uses using the same phone cord, and if it works the modem in the fax is bad. -Carl

set the fax so you can hear dial tone... if no dial tone then check the fax line.... if fax line plugged in... plug it out of the fax and plug into a phone... if still no dial tone then change fax cable... if dial tone... then call your cell... if static... fax wont work call phone company... if you get a funny signal call phone company...

I’m happy to assist further over the phone at https://www.6ya.com/expert/norman_d2fa496dce30c65d

check the the phone line, The fax sinal need good clear. Surely,plug the phone-line is rigth line socket. If you do that all, the broblem is still happenning,need to change "relay" on moderm fax board.

Is the fax sensing the paper you put in to send out? Check the little black levers that poke into the document area. They should move freely when you touch them gently with a finger, and return quickly when you take your finger off. If it can't sense the paper it won't try to send a fax. If, when the paper is inserted, the display changes from whatever it said to anything else, the paper is being sensed.
Let's try dialing manually. Just left of the 1 key is a button labeled "Hook." Pressing that will take the telephone line "off-hook," like picking up the receiver of a phone. You should hear a dial tone -- if not, try adjusting the speaker volume with the buttons just right of the numbers. Once you get a dial tone, dial a number, whether it's another fax, or your own cell phone. As far as the phone company is concerned, your fax is just a phone, calling another phone. If you can make a call, and the phone at the other end rings, we're closing in on the problem. If you can dial another fax machine manually, you can still turn this into a fax call, assuming there's paper ready to fax. After the distant fax answers, touch the Start button, and your fax should take over. If you can't dial manually, try unplugging your fax from the phone line, and replacing it with a regular phone. Can you make calls with it? If not, the fax is no longer a suspect - you have a phone line problem.
Are you at a business where you need to dial 9 to get an outside line? It's easy to forget that detail when you're using a fax, but it has to dial out just like any other phone on the system.
If you can't get a dial tone at all with the fax, but it works with the phone alone, the main board in the fax is probably bad. If you can dial manually, using the Hook switch, but the same number doesn't work when you dial xxx-xxxx-Start, that sounds like a main board problem, too.

Very strange that there a no other symtoms.

Are you sure you are plugged into the LINE port of the fax machine?

Refer to your manual. It may be under RX(recieve settings). Go disable FAX/Tel SW and make sure it is fax mode only