I have a dial tone coming out of the jack on the wall that is only for this fax machine but the fax machine is saying phone off hook.

Make sure you have the phone line plugged in, also make sure it's plugged into the LINE port on the machine. (Ext. is for a extension, i.e. secondary phone for manual dialing)
Also check that the wall jack is functional too, easiest way to do this is hook up a regular phone to the jack and if you get a dial tone you know it's okay.

If the wall jack is getting a dial tone and the line is plugged into the LINE port you may have a bad phone cable, try a different one.

WHat model is the fax machine? Also check to make sure that the phone line and the fax line are not 2 different phone jacks. Also if the phoneline and fax line are on the same jack, make sure to program the fax number into the fax machine. Also, double check if the fax machine has an in and out phone jack that it is in the in jack.

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.

The only thing that could stop you from sending a fax or not get a dial tone, would be the connection to the phone line. Make sure the telephone wire is plugged into the line jack (not ext jack) and should go straight to the wall, without splitters or extensions. If you still cannot send a fax, try another wire or jack

Hello,

Make sure that you have your telephone line from the wall jack plugged into the port on the fax that says "LINE" and that your telephone is plugged into EXT.

All your cables and jacks seem like they are working since your phone gets a dial tone, the onyl thing could be that the wires are mixed or the modem on the fax is broken.

Thanks,

Pat

Typically, a fax machine is connected directly to a telephone wall jack with a known working connection. Try plugging the fax machine directly into a wall jack first and pick up the handset on the fax machine if it has one. You should get a dial tone. Then try to fax something to someone you know.

The machine can also usually be routed through the modem in a computer by connecting the "line" cord on the modem to the wall jack and plugging the fax machine into the the "phone" jack on the modem. You may need to install the software that came with the fax machine to get this to work.

If you have no dial tone, check the wall jack with a known to be working single line phone. If there is a dial tone, it's something to do with fax machine, the computer modem or the connections.

Some fax machines can take advantage of internet faxing through a cable modem or DSL connection. Check your manual for the options available.

Unplug the fax at the wall jack and hook up a regular phone. Listen to the dial tone. It should sound like a regular dial tone.

Next, plug the fax back in and call the machine from a regular phone.

You should hear fax tones.

error 634 is an indication that the line was either busy, or there was no answer on the receiving end.

I would double check your phone cord. There is usually 2 jacks in the back of the fax machine. 1 is for Line, and 1 is for phone.
Your phone cord should be hooked up in the LINE jack that goes to the wall.
I would also double check your phone cord on another phone to make sure the cord is good.
If you look at the clear connector that you plug into your wall and fax machine, does it have 4 copper/gold color wires contacts imbedded in the clear plastic connector?

Another thing to try, if you fax machine has a Line and a Phone connector, try plugging in a phone in the PHONE connector. Then hook up another phone cord going from the LINE to the WALL jack.
If you get a dial tone on your Phone, then you know you have it connected correctly. If no dial tone, then I would go back to the phone cord.
check those things and get back to me and I will see if I can help you with more suggestions.
Good luck.
Mac =)

I'm no expert but, did you try touching the online or hook button on the fax to hear the dial tone? Or connect a basic home phone into the phone jack at the wall the fax was plugged into. Do you get a dial tone. If no dial tone, call the phone company. If there is a dial tone, its the fax.