Problems sending and receiving faxes.

Most fax machines allow you to set the number of times the phone rings before it automatically answers the phone. So if you phone goes to voice mail after 4 rings and the fax machine is set to start the fax after the 5th ring it will never receive the faxes because the call went to voice mail. Good Luck

Make sure the correct phone line is connected to the printer and the correct fax number is set in the printer. This article in the Lexmark website will help you identify and resolve your fax problem: Fax Troubleshooting Topics

it's most likely the compression on the phone line or you need to set up your fax machine for proper receive mode.
Contact your phone service provider to see if they support faxes.
(Faxes cannot handle nearly as much compression as standard voice)

You probably have to set something up in your settings.

Usually this goes: Settings>Fax Setup>Receive

Of course, this is generic, and all Fax machines are different. Is there a model number?

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.

unable to send fax through power line carrier communication. only some part of the document received

here you might find an answer:

http://welcome.solutions.brother.com/bsc/public/us/us/en/faq/faq_top.htm?reg=us&c=us&lang=en&prod=mfc240c_all

Receive Mode Setting
On the operation panel, press the following buttons to select the appropriate receive mode.

1. Press <Fax>.
   
   
2. Press <Menu>.
   
   
3. Press the right or left arrow button to select [Receive mode set], then press <OK>.
   
   
4. Press the right or left arrow button to select the receive mode that best suits your needs, then press <OK>.
   
   
   FAX ONLY MODE: When you want to receive only faxes automatically with your machine, or have a dedicated telephone line for FAX use only.
   
   MANUAL MODE: When you receive mainly voice calls and sometimes faxes, or want to receive faxes manually.
   ANS MACHINE MODE: When you want to receive voice messages on your answering machine and receive faxes automatically.
   FAX/TEL AUTO SW: When you want to receive faxes automatically as well as voice calls.
   DRPD: When you have subscribed to a DRPD service with your telephone company.
   
   
5. Press <Stop/Reset> repeatedly to return to fax standby mode.

Sending Methods

• Memory sending
• Manual sending

Sending From Your Machine (Memory Sending)

1. Load the document on the Platen Glass or the ADF.
   
   
   Sending from the platen
   
   Important: When sending a double-sided document, set the document on the Platen Glass. You cannot scan double-sided documents from the ADF.
   
   
   
   
   
   Sending from the ADF
   
   *MP830 shown
   
   
2. Press <FAX>.
   
   
3. Adjust the settings for your document as necessary.
   
   
4. Dial the recipient's number using the numeric keys or speed dialing.
   
   
5. Press <Color> for color sending, or <Black> for black & white sending.
   
   
   • When the document was loaded on the Platen Glass:
     
     
     1. When the following message is displayed, load the next page on the Platen Glass.
        
        
        
        If you have only one sheet to scan, press <OK>..
        
     2. Press <Color> to send in color, or <Black> to send in black and white.
        
        IMPORTANT: If you do not press the same button you pressed in step 5, the machine does not start scanning.
        
     3. Repeat steps 5a and 5b to scan in all pages of the document.
        
     4. Press <OK>.
        
        
   • When the document was loaded in the ADF:
     
     The machine starts sending automatically after the document is scanned in.
     
     Note: Color sending is available only when the recipient's fax machine supports color faxing.
     

• To cancel sending before sending a fax, press <Stop/Reset>.
• To cancel memory sending while sending a fax, follow any instructions on the LCD after pressing <Stop/Reset>.
• If the document remains in the ADF after pressing <Stop/Reset> during sending a fax, press <OK>. The remaining document is automatically fed out.
  
  

Sending From Your Machine (Manual Sending)
Use manual sending when you want to talk to the recipient before sending a document, or if the recipient does not have a fax machine that can receive automatically.
Caution:

• With manual sending, you cannot use the Platen Glass to send documents.
• You will need to connect a telephone to your machine if you want to talk to the recipient before sending a document.

Follow this procedure:

1. Connect a telephone to your machine if you want to talk to the recipient before sending a document
   
   
2. Load the document in the ADF.
   
   
   
   
   
   Sending from the ADF
   
   
3. Press <FAX>.
   
   
4. Adjust the settings for your document as necessary.
   
   
5. You can lift the handset if one is connected to the machine.
   
   
6. Dial the recipient's number using the numeric keys or coded speed dialing.
   
   
7. Talk through the handset to the recipient. (If you hear a high-pitched signal instead of the
   recipient's voice, go to step 9.)
   
   
8. Ask the recipient to set recipient's fax machine to receive faxes.
   
   
9. When you hear a high-pitched signal, press <Color> for color sending, or <Black> for black & white sending. Then hang up the handset.

Slim1234,
          A multitude of problems might cause receive problems, and the User's Guide has no "receive Problems" section under troubleshooting - so here goes:

        If I had to guess right off the bat, your problem is probably
that the FAX is in "FAX Storage" mode, and is out of memory.
In this mode, it will print FAXes until it runs out of memory.
See problem "g" below.

   a. Voice mail active on the line - if voice mail and FAX-2820 are
       set to answer the line on the same number of rings, there's
       no way to know which will answer first.

   b. Voice mail active on line - if voice mail is set to answer in
       fewer rings than the FAX, then the FAX will always lose
       (but you'll have no problems Xmitting).

   c. Call Waiting active on the line - the call waiting "boop" will
       kill incoming FAXes (and outgoing FAXes too, but your
       personnel will retry the outging ones until they succeed
       and you may only hear complaints about incoming FAXes).

   d. Your FAX-2820 is set to "Manual" or "External TAD" mode.
       Reset it to "FAX only" or "FAX/Tel" mode (depending on
       your office use of the FAX telephone line).
       How to do this: Menu/Set,0,1 <up/down to select mode>
                              press Menu/Set.
   NOTE: your LCD display tells you your receive mode:
       Mine says "Sleep 22:08 Fax", telling me I'm in "FAX only"
       mode, and its 10:08 PM.

   e. You've set the FAX to RING DELAY - if so, the FAX
       must win. Setting ring delay to 00 tells the FAX to answer
       the line silently (an advantage for a busy MD's office).
       How to change this: Menu/Set,2,1,1
       Ref: FAX-2820 User's Guide p.4-2

   f. You dont have a shared (FAX/human) line set to
     "Easy Receive"; if someone answers the call and
      Easy Receive is off, then they need to press START on
      the fax machine front panel or dial *51 and hang up.
      How to change it: Menu/Set,2,1,3
      REF: Fax-2820 User's Guide p. 4-2

  g. You may be set up for "FAX storage."  In this mode, received
      FAXes will be stored (and printed) until you run out of
      memory (quickly done on a Brother FAX-2820), then you
      get nada (but sending FAXes still works).
      How to reset this: Menu/Set,2,5,1 <up/down>
      REF: Fax-2820 User's Guide p.6-2

  h. You may have set up FAX forwarding.  In this mode, sending
      FAXes will work fine, but all incoming FAXes willl be sent
      to another telephone number.
      How to turn it off: Menu/Set,2,5,1 <up/down>

      If this laundry list of (sending OK, Receiving dead) scenarios
 doesn't resolve the problem, email your FAX number to me
and we'll do some cross-country FAX debugging.

                                  Dave in tech support
                                  [email protected]
P.S.
      The above features may have been set remotely by a
   nefarious (or somewhat knowledgeable) individual - remember
   that a little knowledge is a dangerous thing (even for
   FAXes). See (extensive) remote programming instructions
   on p.6-6 of the User's Manual.

        To print out the caller ID list - and possibly find out the
   source of the remote programming:
   Menu/Set,2,0,3 <up/down to "print report">, Menu/Set,
    Start, <Caller ID report prints>, Stop/Exit
   Ref: Brother Fax-2820 User's Guide p.A-3

I would suggest there is nothing actually wrong with your machine, as you can indeed receive faxes from other parties. The problem mostly likely lies with the equipment and/or lines of the sending party. One thing you might suggest to them is to turn off ECM (Error Correction Mode) and/or lowering the sending/receiving speed of the machine - preferably the sending speed of the sending party.