How do I connect my fax to my cable modem

check cable
check modem
phone is working ok must be either of those or the fax settings. Also check owners manual

Make sure the phone line from the wall is plugged into the "line in" jack on your machine

Hi first unplug the fax and plug in a phone handset if you get a dial tone you will know its not the phone Co. fault next the cable that connects the fax to the phone line socket must be the one that came with the fax when new as not all of the cables will work on all fax machine for instance a panafax cable will not work on a brother fax.
If the cable is ok then you are left with a modem fault and its probably time to replace the machine

Remove the phone line from the back of the fax and connect a standard phone (not a business PABX or PAX system phone) to the line. Ensure dialtone is available. (Make sure in doing this that you are also testing the cable from the phone socket to the fax). If no dialtone, replace cable or fix line.

Check that the line is connected to the 'line' port on the fax, not the 'phone' port.

If still no dial tone, it may be modem fault (in the fax). Seek specialist attention.

Check the physical connection of the phone line to the computer make sure that it is connected to phone line symbol of the Ethernet adapter. Then make sure that the driver of the adapter is installed properly on the computer or you can try to scan the hardware first before the re-installation of the driver using the adapter.

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.

I must tell you that this is not a printer issue, since printer does not have inbuilt fax capabilities....Actually you are trying to send fax from the computer using a Data Fax Modem. Printer just used for scanning and printing documents for fax...

1. Please check if your computer have Fax modem.
Look at the back of the system tower, if you see a phone jack port (probably two of them).

2. If yes then , you need to have a telephone cable directly from wall (not the ethernet cable coming from DSL modem), fax works on analog signals which is possible only from telehone line.

If your phone line is working, there is no chance the it will give you error again for NO Dial tone

Turn the machine round and make sure that you haven't fitted the telephone cable into the phone slot. if you have remove the cable from the machine and plug into the other slot that is usually indicated by a letter L. Once done this try the on hook dial and hopefully there will be a dial tone. If there is not then try a different telephone cable if still the same problem then unfortunately the modem card is faulty and will need replacing.

Thanks J

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 error 680 means There is no dial tone. The modem is not detecting a dial tone There are many possible causes of a No Dial Tone Error. 1.Check cable is correctly inserted into back of modem and phone socket 2.Check properties of connection, make sure correct modem is being used 3.Disable "wait for dialtone before dialing" in My Computer > Dial Up Networking > Properties of Connectoid > Configure > Connection > remove checkmark under call preferences 4.Try removing fax machines or other devices connected to the line 5.Make sure no one is using the telephone when trying to connect