My epson fax machine is hooked to magic jack and every time I try to send a fax, I get: communication error 0404

you can get the manual hear, also try Epson tech support

http://www.retrevo.com/support/Epson-810-Multifunction-Printers-manual/id/23545ci969/t/2/

Best of Luck Falco

1. Operating Systems
   • As of 2010, the Magic Jack works well with Windows XP and Vista machines. Windows 7 has reported problems listed on their Microsoft Answers forum.
     
   Do Not Support
   • According to the Magic Jack company website they "...do not officially support using faxing with Magic Jack."
     
   • 
     
   Testing the Fax
   • Test your fax machine with Magic Jack by turning off the error correction on the machine and using the slowest speed available. If successful at that speed, increase the speed and check if it continues to work.
     

Read more: Does Magic Jack Support Faxing? ' eHow.com http://www.ehow.com/facts_7148239_magic-jack-support-faxing_.html#ixzz1tntAK093

How to resolve the problem Fax error 0404

Magic Jack is lying to you. ALL fax machines are Analog devices, Magic Jack is Digital

I had same problem when I used the dual jack. I had to change it. I had the dual jack which would make it easier to use when I was going to send a fax.
Good Luck

I have and use Magic Jack too..Does your Latitude Communicator just plug right into a phone jack with a regular phone cord? If it does, then it should work...You will have to always leave your laptop on and never turn it off because Magic Jack requires a constant connection...Plug your equipment into the back of your Magic Jack and then with another phone, call the company that monitors your pacemaker/defibulator and ask them to "test" your line to see if you will receive a signal from them through your Magic Jack...You will to have to plug it all in and then test or you won't ever know...When I plug my home phone into the back of my Magic Jack, I receive a dial tone just like it was connected to a home based landline phone

make sure it is plugged in right in the back.try using a different phone jack in the house

Yes, most definately so. There are ways to boost the output signal of your machine but these days nobody has had to do it because lines are much clearer in the western hemisphere. The Magic Jack is great for voice calling but the faxes need instant responses from each other to progress through the initial training protocol and onto the document transmission. You may, if you have one, try another magic jack. It could be down to your particular Magic Jack. Try faxing without the Magic Jack.

I had the same problem trying to send out faxes out using my Brother MFC 7340. I use a magic jack phone line. Page 106 of the user manual says if sending via VOIP phone line, you should press menu, then 2, 0, 1 to select "Basic (for VOIP) mode. Then press ok. Then press stop/exit. This cuts the modem speed down to 9600 bps and turns ECM off. Then retry to send the fax. I did that and can now send and receive faxes.

It won't help. Magic Jack is DIGITAL your fax machine is ANALOG