Fax I dont have a manual and I dont want the fax to answer the phone. How do I turn it off?

You can receive faxes automatically or manually. If you turn off the Auto Answer option, you must receive faxes manually. If you turn on the Auto Answer option (the default setting), the device automatically answers incoming calls and receives faxes after the number of rings that are specified by the Rings to Answer setting. (The default Rings to Answer setting is five rings.)
If you receive a legal-size fax and the device is not currently set to use legal-size paper, the device reduces the fax so that it fits on the paper that is loaded. If you have disabled the Automatic Reduction feature, the device prints the fax on two pages.
NOTE: If you are copying a document when a fax arrives, the fax is stored in the
device memory until the copying finishes. This can reduce the number of fax pages stored in memory.
This section contains the following topics:
• Receive a fax manually
• Set up backup fax reception
• Reprint received faxes from memory
• Poll to receive a fax
• Forward faxes to another number
• Set the paper size for received faxes
• Set automatic reduction for incoming faxes
• Block junk fax numbers
• Receive faxes to your computer (Fax to PC and Fax to Mac)
Receive a fax manually
When you are on the phone, the person you are speaking with can send you a fax while you are still connected. This is referred to as manual faxing. Use the instructions in this section to receive a manual fax.
NOTE: You can pick up the handset to talk or listen for fax tones.
You can receive faxes manually from a phone that is:
• Directly connected to the device (on the 2-EXT port)
• On the same phone line, but not directly connected to the device
NOTE: The automatic document feeder must be empty to receive a fax. If there are documents in the ADF, then the device will not be able to receive incoming faxes.
To receive a fax manually
1. Make sure the device is turned on and you have paper loaded in the input tray.
2. Remove any originals from the document feeder tray.
NOTE: The automatic document feeder must be empty to receive a fax. If there
are documents in the document feeder, then receiving the fax will be
unsuccessful.
3. Do one of the following to answer a fax manually:
• Set the Rings to Answer setting to a high number to allow you to answer the
incoming call before the device answers.
• Turn off the Auto Answer setting so that the device does not automatically
answer incoming calls.
4. If you are currently on the phone with the sender, instruct the sender to press Start on their fax machine.
5. When you hear fax tones from a sending fax machine, do the following:
a. Press START FAX Black or START FAX Color on the device control panel.
b. When prompted, select Fax Receive.
NOTE: Depending on your country/region, the device might receive the fax
automatically when you hear fax tones from the sending fax machine.
6. After the device begins to receive the fax, you can hang up the phone or remain on the line. The phone line is silent during fax transmission.

to stop the fax automatically switching to fax mode you have to set it to manual to recieve calls and dissable the fax,there should be an auto/fax and call mode, therefore when someone calls it will go to your voicemail, but that means that you will not be able to recieve a fax. Normally auto mode, will first try the fax, if no fax is recognised it will switch to normal line ringer, then if no answer it should go to your voicemail if unanswered.

Introduction The HP All-in-One can receive faxes automatically or manually depending on the Auto Answer setting. If the Auto Answer option is set to On (the default setting), the HP All-in-One will automatically answer incoming calls and receive faxes after the number of rings specified by the Rings to Answer setting. (The default Rings to Answer setting is five rings). Refer to the given instructions to receive faxes automatically or manually. Receiving faxes The HP All-in-One can receive faxes automatically or manually. Receiving a fax automatically To receive faxes automatically, set the Auto Answer option to On (the default setting). The HP All-in-One will automatically answer incoming calls and receive faxes after the number of rings specified by the Rings to Answer setting. (The default Rings to Answer setting is five rings). Receiving a fax manually If the HP All-in-One has been set up to receive faxes manually (the Auto Answer option is set to Off ), or you answer the phone and hear fax tones, use these instructions to receive faxes.

1. Make sure the HP All-in-One is turned on and you have paper loaded in the input tray.
2. Remove any originals from the document feeder tray.
3. Set the Rings to Answer setting to a high number to allow you to answer the incoming call before the HP All-in-One answers. Or, turn off the Auto Answer setting so that the HP All-in-One does not automatically answer incoming calls.
4. If you are currently on the phone with the sender, instruct the sender to press Start on their fax machine.
5. When you hear fax tones from a sending fax machine, do the following:
   1. Press Start Fax Black or Start Fax Color on the control panel of the HP All-in- One.
   2. When prompted, press the down arrow to highlight Receive Fax Manually , and then press OK .
6. Press Start Fax Black again.
7. After the HP All-in-One begins to receive the fax, you can hang up the phone or remain on the line. The phone line is silent during fax transmission.
   
   
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Turn off auto receive and set to manual, or unplug phone line to fax when not in use. -Carl

if it sends ok, then it has probably been switched to "manual receive" form "automatic mode"

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.

Receive a fax
Depending on the Auto Answer setting, your HP All-in-One can receive faxes
automatically or manually. If you have set the Auto Answer option to Off, you will
need to receive faxes manually. If the Auto Answer option is set to On (the default
setting), your HP All-in-One will automatically answer incoming calls and receive faxes
after the number of rings specified by the Rings to Answer setting. (The default
Rings to Answer setting is five rings.)
Receive a fax manually
If you set up your HP All-in-One to receive faxes manually (the Auto Answer option is
set to Off) or you answer the phone and hear fax tones,
1. Make sure the HP All-in-One is turned on and you have paper loaded in the input
tray.
2. Remove any originals from the document feeder tray.
3. If you are currently on the phone with the sender, instruct the sender to press
Start on their fax machine.
4. When you hear fax tones from a sending fax machine, do the following:
a. Press Fax on the control panel of your HP All-in-One.
b. When prompted, press 2 to select Receive fax.
c. After the HP All-in-One begins to receive the fax, you can hang up the phone.

Turn auto-answer off and you can manually answer fax calls by pressing 9 on your touch-tone phone. See page 22 of the Fax Guide.

Try calling your fax machine from a cell phone. If the fax doesen't answer, or if the line is busy, the phone line may be bad. Also check that the phone line to the fax is plugged into the receptical marked LINE, not PHONE. The PHONE receptical is to connect a telephone to the fax machine. If it still does not answer, try going into the fax menu and go to RECEIVE settngs. Try changing each setting, then call the fax with the cell to see if it answers. Write down each setting before you change it, so you can set it back if changing it does not solve the problem.

Usually, fax machines don't have caller ID capability.. If the sender's fax number appears on the faxes you receive, it's just that they have programmed it into their fax machine as a header.