We have two fax machines hook up to one dedicated fax line. When we send a fax from wither machine it is not faxing to the phone we fax it only sends the fax for the second fax machine that is in our office. We are not receiving our faxes either. Is there a way that we can set both machines to fax out but only one fax machine receive the faxes. Help!! We are a business medical office and our fax communication is very important.

Problem lies in your Receive Mode setting. If you don't have a dedicated phone line for the fax machine, you need to set it up for either Manual where you answer every call or Fax/Tel whereby the Fax machine determines if the incoming call is a fax or phone call. Instructions per Intellifax 4100 Manual.

Select a Receive Mode
Choose the mode that best suits your needs by pressing the Mode button
repeatedly until the FAX and FAX/TEL lights show the setting you want to use.
Manual
You must answer every call yourself.
The Brother machine must be started manually
to receive faxes.
Fax
For use with a dedicated fax line.
Every call is answered as a fax.
Fax/Tel
For receiving fax and voice calls on one line.
The FAX answers every call and receives a fax or
double rings for you to pick up a voice call.
TAD
For use with an answering device.
The TAD answers every call and stores voice messages.
Fax messages are printed.

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.

Obviously.....take it back!

if your fax is on a dedicated fax line, make sure your display says "fax only" or "auto". if not on a dedicated line, you'll have to give more info on what kind of hook up you have. in other words, is there an answering machine hooked inline, etc.

good luck,
razors

1 line is fine as long as the fax is set to auto recieve mode

It the funky line DSL?
Fax machines are designed to be on a dedicated ANALOG phone line. Sorry

Fax machines are designed to have their own dedicated phone lines.

Anything else is a ****-shoot.

Fax machines are designed to have their own dedicated analog phone line.

Any other condition is a **** shoot.

Cannot figure how to hook up Canon MP830 all in one fax with remote answering machine. I can plug in phone line to send faxes fine but when hooked up in same hole and the phone rings it goes immediately to fax and can't receive phone calls. Maybe i have phone line hooked up in wrong place on my machine. The answering machine is in our master bedroom on the other side of the house. With my last a canon also i had it hooked up to go to fax after a certain amount of rings and it worked fine. That machine got fried by lightening and i replaced it with this machine. If anyone knows what i am doing wrong i really need this fax hooked up all the time for my business.

Set the rx fax to ans on the lowest # of rings and fax mode..Set the tx fax on tel mode..