Fax is always busy when sending, have the line into the phone line port and into the telephone jack, fax scans and dials and even redials but it never go through, prints out receipt that says busy/no response.

It means there is no dial tone on the fax line, is the rj11 plugged in properly [ (Line) on the copier, not he one labeled as (TEL) ], is the telephone patch defective, or you have an active phone on the wall jack, (test it it with an ordinary phone), or the receiving party is busy, try later, or try a different nunber.

How to enter Fax mode
Before sending faxes, make sure (Fax) is illuminated in
green. If not, press (Fax) to enter Fax mode. The default
setting is Fax.
How to dial
You can dial in any of the following different ways.
Manual dialing
Press all of the digits of the phone or fax number.
Setup Send
3 - 2 SETUP SEND
Speed-Dialing
Press Search/Speed Dial, #, and then the two digit Speed-Dial
number. (See Storing Speed-Dial numbers on page 5-1.)
Search
You can search for names you have stored in the Speed-Dial
memories. Press Search/Speed Dial and the navigation keys to
search. (See Storing Speed-Dial numbers on page 5-1.)
* To search alphabetically, you can use the dial pad to enter the first
letter of the name you are looking for.
Fax Redial
If you are sending a fax manually and the line is busy, press
Redial/Pause, and then press Black Start or Color Start to try
again. If you want to make a second call to the last number dialed,
you can save time by pressing Redial/Pause and Black Start or
Color Start.
Redial/Pause only works if you dialed from the control panel.
If you are sending a fax automatically and the line is busy, the MFC
will automatically redial one time after five minutes.
If the LCD shows Not Registered when you enter the
Speed-Dial number, a number has not been stored for it.

Color fax transmission
Your MFC can send a color fax to machines that support this feature.
However, color faxes cannot be stored in the memory. When you
send a color fax, the MFC will send it in real time (even if Real Time
TX is set to Off).

This section describes dialing and sending faxes directly using the Numeric buttons.

note:

• A PBX (Private Branch Exchange) is an on-site telephone switchboard. If your machine is connected through a PBX or other telephone switching systems, you have to dial the outside line access number first, and then the number of the party you are calling.
  

Sending a Fax with the Numeric Buttons .

Click here for other useful sending methods.


1. Preparing for sending a fax.(1) Make sure that the power is turned on.

(2) Load a document on the Platen Glass or in the ADF.

important:

• When sending a double-sided document, set the document on the Platen Glass. You cannot scan double-sided documents from the ADF.

(3) Press the FAX button.
The fax standby screen will appear.

(4) Adjust the density (scan contrast) or image quality (fax resolution) as necessary.
See "Adjusting the Sending Quality"

2. Sending the fax.

• When the document was loaded on the Platen Glass:

(1) Use the Numeric buttons to dial the recipient's number.

(2) Press the Color button for color sending, or the Black button for black & white sending.
important:

• Color sending requires that the recipient's fax machine supports color faxing.

(3) Press the OK button.
The machine starts sending the fax.
note: When loading two or more documents

• Load the next page, and press the same button as you pressed in (2) of step 2. Repeat the same procedure to scan all pages of the document, and press the OK button.
  
• When you have sent the first page with the Black button, the following pages will be sent in black and white.

When the document was loaded in the ADF:

(1) Use the Numeric buttons to dial the recipient's number.
(2) Press the Color button for color sending, or the Black button for black & white sending.
The machine scans the document automatically and starts sending the fax.
important:

• Color sending requires that the recipient's fax machine supports color faxing.

note:

• To cancel sending a fax, press the Stop button, and follow the instructions on the LCD.
  
  
• If documents remain in the ADF after pressing the Stop button during scanning, "Close the feeder cover [OK]Eject the document" will appear on the LCD. Press the OK button so that the remaining document is automatically fed out.

Automatic redialing

• When sending a fax and the recipient's line is busy, the machine will redial the number after a specified interval. Auto redial is enabled by default. Auto redial can be enabled or disabled by selecting ON or OFF. Select ON to specify the number of redialing in Redial times and redialing interval in Redial interval.

Redialing the Number Dialed with the Numeric Buttons

1.Prepare for sending a fax.
(1) Make sure that the power is turned on.
(2) Load a document on the Platen Glass or in the ADF.
(3) Press the FAX button.
The fax standby screen will appear.
(4) Adjust the image density (scan contrast) or quality (fax resolution) as necessary.
See "Adjusting the Sending Quality"
2. Select the telephone number recently dialed.
(1) Press the Redial/Pause button.
Most recently dialed fax number using the Numeric buttons will appear.
(2) Use the (-) or (+) button to select the number to redial.

(3) Press the OK button.
The selected number will appear in the fax standby screen.
3. Send the fax.
Press the Color button for color sending, or the Black button for black & white sending.
important:

• Color sending requires that the recipient's fax machine supports color faxing.

1. Make sure that you have plugged the phone cord directly and securely into the wall jack and into the back port of the fax product. The fax port on your product is marked "Line," "To Wall Jack," or with a wall jack symbol.
2. Make sure the Line Interface Unit (box that the phone cord plugs into) is fully seated into the back of the fax product.
3. Remove any other devices from the line such as splitters, credit card machines, or telephone answering machines.
4. Try sending and receiving faxes on a different fax line.
5. Try using a different telephone cord.
6. Have the phone company test your line for static or noise problems.
7. Turn Error Correction Mode (ECM) off, if you encounter the same error repeatedly.

Regards
Riztech

The only thing that could stop you from sending a fax or not get a dial tone, would be the connection to the phone line. Make sure the telephone wire is plugged into the line jack and not ext jack of the machine, and should go straight to the wall, without splitters or extensions.

If you still cannot send a fax, try another wire or jack

CHECK THE TELEPHONE NO.
Verify that you are dialing the number correctly. (i know its funny to ask)

Verify that you are dialing the number correctly. You must dial all of the numbers required to make a phone call from the same line. This includes numbers that must be dialed to access an outside line or to access long distance services.

TRY DIALING FROM THE FRONT PANEL
manually dial the number from the front panel of the fax.

If you have been using a speed dial or are faxing from the computer, print the page to be faxed and manually dial the number from the front panel of the fax. If the fax can be sent when dialed from the front panel, recreate the speed dial setting and insert some pauses.


Check the connections




Check the TELEPHONE LINE

Make sure that you have plugged the phone cord directly and securely into the wall jack and into the back port of the fax product. The fax port on your product is marked "Line," "To Wall Jack," or with a wall jack symbol.

Check LIU

Make sure the Line Interface Unit (box that the phone cord plugs into) is fully seated into the back of the fax product.

Remove the SPLITTER

Remove any other devices from the line such as splitters, credit card machines, or telephone answering machines.


Can try sending the Fax on Another Line


CHECK WITH DIFFERENT CABLE
Try using a different telephone cord.

Hi ...

It might be possible that the line is loose or the long distance calling code is incorrect. Follow the below instructions which might resolve the problem.

Sending Using a Long Distance Calling Code The telephone company or PBX system may use long distance calling codes on a phone line as a means to manage long distance calls. This service may extend to a fax phone line and for local phone calls as well. To use a calling code for faxing, enter a pause (or pauses, as necessary) in the dialing sequence to allow time for the phone system to distinguish between the phone number and the calling code. For example, if the calling code has to be entered after the phone number, press <Redial/Pause> after the long distance number and then enter the calling code.
Here is an example of a couple of variations that may be used by the phone company / PBX system. (For details on time sequence between the long distance number and when you must enter the calling code, please contact your phone company or telecommunications specialist.)
Long distance number: 212.555.1212
Calling code: 123456
Scenario One: 12125551212p123456 Scenario Two: 123456p12125551212

Note: The above scenarios include a pause (p) in between the dialing sequence. This pause may be necessary to allow the phone system to detect each set of dialing sequences. The pause length can be adjusted from one to nine seconds, the default is two seconds.

Tips to help you send a fax using a calling code.

1. To send a fax using a calling code, it may be necessary to add a pause(s) before the next string of dialing digits. The above example shows how a calling code is used to dial a long distance fax number. To provide time before the calling code number is dialed and avoid misdialing, a pause should be added.
   
   Example: 12125551212p123456
   
   The number of pauses will depend on the phone / PBX system.
   
   It is suggested to confirm if the time before the next set of digits is dialed will always be constant. This way you can always use the same number of pauses for that dialing sequence. If needed, you can also change the pause [Pause time] length from its default 2 seconds.
   
   
2. Connect a telephone to the fax machine.
   
   1. Connect a line cord from the telephone wall jack to the [L] jack (or item <1>) on the fax machine.
      
      
      
   2. Connect a line cord from the extension telephone port on the fax machine (top jack (or item <2>)) to an external telephone.
      
      
      
      
3. To send a fax using a calling code, it is recommended to dial using the attached telephone.
   
   1. Press the <FAX> button on the operator panel.
      
   2. Insert the documents face-up on the ADF.
      
      
      
   3. Pick up the handset of the attached telephone and confirm you hear a dial tone.
      
   4. Dial the fax destination number on the attached telephone.
      
   5. When you are prompted to enter your calling code, dial it on the attached phone.
      
   6. When you hear the remote fax machine's high-pitched receive tones, press <Color> to send a color fax or <Black> to send a black and white fax. The audio signal heard from the handset will be cut off.
      
   7. Hang up the handset.
      
   8. When the transaction is complete, the fax machine will return to standby mode.

Don't forget to vote if this helps ... Cheers :)

Step one: Check the fax number
Make sure the fax number is correct; include any numbers that you have to dial to use the telephone, such as an area code, access codes for outside lines or long-distance services, and so on. If you have to dial a particular sequence of numbers to make a telephone call from that telephone line, you also have to dial that sequence of numbers to send a fax.
If the issue is resolved, you do not need to continue troubleshooting.
If the number is correct, continue to the next step.
Step two: Dial the number manually
Instead of using a speed dial setting or sending the fax from the computer, dial the number manually from the product control panel.
If the fax sends when you dial the number from the control panel, follow these steps to recreate the speed dial setting and insert pauses in the number.
On the product control panel, press the Setup button.
Press the Left Arrow button ( ) or Right Arrow button ( ) until Speed Dial Setup appears on the control panel display, and then press the OK button.
Press the Left Arrow button ( ) or Right Arrow button ( ) until Individual Speed Dial appears on the control panel display, and then press the OK button.
Press the Left Arrow button ( ) or Right Arrow button ( ) to select an unassigned speed dial entry, and then press the OK button.
Use the product keypad to enter any numbers that must be inserted before the fax number, such as an area code or access codes for outside lines or long-distance services, and then press the Redial/Pause button to insert a pause.
Enter the rest of the fax number, using the Redial/Pause button to insert pauses between the numbers, and then press the OK button.
Enter the name of the speed dial setting, and then press the OK button to save the speed dial setting.
Try to send the fax again.
If the issue is resolved , you do not need to continue troubleshooting.
If the issue is not resolved , continue to the next step.
Step three: Run a fax diagnostic test
Press the On button ( ) to turn on the product, and then make sure the product is correctly connected to the telephone jack.
Make sure that there is plain white paper in the input tray.
On the product control panel, press 6 , and then press 6 again.
This selects the Tools menu and then selects Run Fax Test .
The fax diagnostic test page prints.
Review the results of the test.
If the result of the fax diagnostic test is All Pass , skip to Step four: Reinitialize the fax.
If the result of the fax diagnostic test is a failure, a page prints that describes the issue and offers possible solutions. Follow the solutions on the printout.
If the solutions on the printout resolve the issue, you do not need to continue troubleshooting.
If the solutions on the printout do not resolve the issue, continue to the next step.
Step four: Reinitialize the fax
While the product is on, disconnect the power cord from the back of the product and from the electrical outlet.
Make sure that the telephone cord is fully inserted into the port labeled 1-Line on the back of the product.
Connect the power cord to the back of the product, and then connect the power cord to the electrical outlet.
When the product is in the ready state, try to send and receive a fax again.
If the issue is resolved , you do not need to continue troubleshooting.
If the issue is not resolved , continue to the next step.
Step five: Test the send/receive functions
Use the product keypad to send a fax. Watch the product control panel display and listen to the sounds the product makes.
If the product is working correctly, the following events occur.
When the product begins to dial, a dial tone is audible, followed by the sound of the product dialing. A Dialing message appears on the control panel display.
When the receiving fax answers the call, the product and the fax exchange tones. A Connecting message appears on the control panel display. During this phase, the product and the fax compare capabilities, exchange information about how to send the fax, and try to establish a reliable transmission speed.
After the connection is established, the product sends the pages of the document. Messages appear on the control panel display that indicate the status, such as Sending page 1 .
Review the results of the fax.
If the fax is transmitted successfully, continue to the next step.
If there is no audible dial tone or the receiving fax does not answer the call, try sending the fax to a different destination. If this second attempt also fails, continue to the next step.
If the receiving fax answers the call and begins beeping, but the Connecting message does not appear on the product control panel display, the product is not detecting the tones from the receiving fax. Continue to the next step.
Step six: Use an analog telephone service
HP Fax and All-in-One products are designed to work with analog telephone services and might experience some difficulties when they are connected to phone lines with digital services. Make sure the product is connected to an analog telephone service.
To obtain digital services information or support, contact the telephone service provider or system administrator.
Step seven: Check the phone cord and fax connections
Disconnect the telephone cord, and then examine the connector on the end of the cord. Make sure the cord only has two wires.
Figure 1: Telephone cord with two wires
Figure 2: Telephone cord with four wires
If the cord has four wires, replace it with a two-wire telephone cord.
If you must use a cord with four wires, use the converter that shipped with product. The converter allows a cord with four wires to work with a device that requires a cord with two wires.
Make sure the fax is connected directly to the telephone jack by a telephone cord. Connect the cord to the 1-Line port on the back of the product.
Figure 3: Fax only
1 - Telephone jack
2 - Telephone line
3 - 1-Line
4 - 2-Ext
If other devices need to use the same telephone jack, make sure they are connected to the 2-Ext port on the back of the product.
Connect a single-line telephone to 2-Ext , and then pick up the receiver and listen for a dial tone. Make sure you are able to dial out using the telephone keypad. If you hear a dial tone and are able to dial out using the phone, the product is properly connected to a working telephone cord and telephone jack.
Figure 4: Fax and telephone
1 - Telephone jack
2 - Telephone line
3 - 1-Line
4 - 2-Ext
5 - Telephone
Figure 5: Fax and PC or modem
1 - Telephone jack
2 - Telephone line
3 - 1-Line
4 - 2-Ext
5 - PC or modem
If you change any cable connections, try sending and receiving a fax again to make sure that the issue is resolved.
If the issue is resolved , you do not need to continue troubleshooting.
If the issue is not resolved , continue to the next step.
Step eight: Remove any other devices from the telephone line
If any other devices, such as a telephone, an answering machine, or a modem, are connected to the telephone line, remove each device.
NOTE: Remove each device even if it is in another room, connected to another telephone jack, or connected using a line splitter.
Connect the product to an analog telephone line by connecting one end of the two-wire telephone cord directly to the telephone jack and then connecting the other end of the telephone cable directly to the 1-Line port on the back of the product.
Try to send a fax again.
If the issue is resolved , you do not need to continue troubleshooting.
If the issue is not resolved , continue to the next step.
Step nine: Perform a partial reset of the product
A partial reset of the product returns all fax settings to the default values. It might be necessary to reset the language and country/region settings after the partial reset is complete.
Disconnect the power cord from the back of the product.
Wait 20 seconds, and then press and hold # and 3 on the product control panel.
Connect the power cord to the back of the product, and then release the buttons when the product turns on.
The product is reset to factory defaults.
Try to send and receive faxes again. If the problem still exists, continue to the next step.
Step ten: Service the product
If you have completed all the steps listed above and are still experiencing a problem, service the product.

There are 2 ports on the rear, 1 for the incomming phone line, and one to plug in a telephone handset (passthrough) if the telephone line is plugged into the wrong port, the fax machine is unable to dial properly, So try plugging into the other port on the back, it's just next to the other port hope this helps

Where the telephone line comes in from the wall, make sure that it is plugged in the "line" or "wall" port. There is probably another port call "tel" or "acc". If the line is plugged into that port you will still get a dial tone but you are not connected to the fax's modem. You hope that's it. Ed