How To Enable DTMF Digits on AR_M_280N Fax machine??

You can send a fax to up to 142 fax numbers, using any combination of dialing methods:
- One-touch Speed Dialing (up to 32 destinations)
Press the desired One-Touch Speed dial button(s)
- Coded Speed Dialing (up to 100 destinations)
Press [Coded Dial] > enter the 2 digit code (00-99) using the numeric buttons and be sure to press [Coded Dial] before each code
- Regular dialing and redialing (10 destinations)
Enter the number using the numeric buttons or [Redial/Pause] and be sure to press [Set] after each entry with the numeric keys

After all the numbers are listed, press [Start]. The machine will scan in the document (memory) and then begin sending it to the destinations in numerical order, starting with One-Touch, then Coded and finally the numbers dials with the numeric keys.

You can also create a group if you frequently send faxes to the same group of people by first saving them as One-Touch and then adding them to a new group.

You can send a fax in a variety of ways. Using the control panel, you can send a black and white or color fax. You can also send a fax manually from an attached phone. This allows you to speak with the recipient before sending the fax.
To send a basic fax (single- or multiple-page black-and-white fax) by using the control panel.These features allow you to control the pace of your dialing. They are also useful when you want to use a calling card to charge the call and you have to respond to tone prompts while dialing. NOTE: If you need printed confirmation that your faxes were successfully sent, enable fax confirmation before sending any faxes. TIP: You can also send a fax manually from a phone or by using monitor dialing.
1. Load your originals. NOTE: If you are sending a multiple-page fax, you must load the originals in the document feeder tray. You cannot fax a multiple-page document from the glass. 2. Enter the fax number by using the keypad, press Speed Dial or a one-touch speed dial button to select a speed dial, or press Redial/Pause to redial the last number dialed.TIP: To add a pause in the fax number you are entering, press Redial/Pause, or press the Symbols (*) button repeatedly, until a dash (-) appears on the display. 3. Press START FAX Black or START FAX Color. • If the device detects an original loaded in the automatic document feeder, it sends the document to the number you entered. • If the device does not detect an original loaded in the automatic document feeder, the Fax from glass? prompt appears. Make sure your original is loaded print-side down on the glass, and then select Yes.TIP: If the recipient reports issues with the quality of the fax you sent, you can try changing the resolution or contrast of your fax.

Send a fax manually from a phone You can send a fax from a telephone on the same phone line if you prefer to use the keypad on your phone, instead of the keypad on the control panel of the device. You can do this by plugging in a phone into the 2-EXT port on the back of the device. When you send a fax manually, you can hear the dial tones, telephone prompts, or other sounds through the handset on your telephone. This makes it easy for you to use a calling card to send your fax. Depending on how the recipient has their fax machine set up, the recipient might answer the phone, or the fax machine might take the call. If a person answers the phone, you can speak with the recipient before sending the fax. If a fax machine answers the call, you can send the fax directly to the fax machine when you hear the fax tones from the receiving fax machine.
1. Load your originals. NOTE: This feature is not supported if you load your originals on the glass. You must load your originals in the document feeder tray. 2. Dial the number by using the keypad on the phone that is connected to the device. NOTE: Do not use the keypad on the control panel of the device when manually sending a fax. You must use the keypad on your phone to dial the recipient's number. 3. If the recipient answers the telephone, you can engage in a conversation before sending your fax. NOTE: If a fax machine answers the call, you will hear fax tones from the receiving fax machine. Proceed to the next step to transmit the fax. 4. When you are ready to send the fax, press START FAX Black or START FAX Color. NOTE: If prompted, select Send Fax, and then press START FAX Black or START FAX Color again. If you were speaking with the recipient before sending the fax, inform the recipient that they should press Start on their fax machine after they hear fax tones.
The telephone line is silent while the fax is transmitting. At this point, you can hang up the telephone. If you want to continue speaking with the recipient, remain on the line until the fax transmission is complete.

Send a fax using monitor dialing Monitor dialing allows you to dial a number from the control panel as you would dial a regular telephone. When you send a fax using monitor dialing, you can hear the dial tones, telephone prompts, or other sounds through the speakers on the device. This enables you to respond to prompts while dialing, as well as control the pace of your dialing. TIP: If you do not enter your calling card PIN fast enough, the device might start sending fax tones too soon and cause your PIN not to be recognized by the calling card service. If this is the case, you can create a speed dial entry to store the PIN for your calling card. NOTE: Make sure the volume is turned on, or you will not hear a dial tone. To send a fax using monitor dialing from the control panel
1. Load your originals. NOTE: If you are sending a multiple-page fax, you must load the originals print-side up in the document feeder tray. You cannot fax a multiple-page document from the glass. 2. Press START FAX Black or START FAX Color. • If the device detects an original loaded in the automatic document feeder, you will hear a dial tone. • If the device does not detect an original loaded in the automatic document feeder, the Fax from glass? prompt appears. Make sure that your original is loaded on the glass, and then select Yes. 3. When you hear the dial tone, enter the number by using the keypad on the control panel. 4. Follow any prompts that might occur. TIP: If you are using a calling card to send a fax and you have your calling card PIN stored as a speed dial, when prompted to enter your PIN, press Speed Dial or a one-touch speed dial button to select the speed dial entry where you have your PIN stored. Your fax is sent when the receiving fax machine answers.

That sounds ok for me.
It is common thing what fax 2920/2820 should do.
Have you ever send fax to that same number previous?
Its probably problem with destination fax machine.

I have this manual. [email protected]. Please put SAMSUNG SF3100 as the subject. List of Features
This machine was designed using the latest technology. It is a full-featured, high-performance machine that not only meets, but exceeds industry standards. The following is a list of its many exciting features:
Features for both SF-3100 and SF-3100T
• Inkjet printing on plain paper
• 14.4Kbps high speed faxing
• 80 page holding memory
• Seven language display and report; English, German, French, Italian, Spanish, Portuguese and Dutch .
• Stand-alone, full-function fax machine
• Convenient 99 pages desk-top copier
• 15 page Anti-Skew Document Feeder
• Five One-Touch and 50 Speed-Dialing locations
• Group Dialing to eliminate repetitive dialing to the same multiple destinations
• Four reception modes; TEL, FAX, AUTO and TAM1
• Broadcasting to send the same document to multiple destinations

Sending a fax to another county is easy - almost as easy as sending a fax to someone in your own country. The only difference is the phone number that you'll dial.
When sending a fax from one U.S. city to another, you dial a 1, then the area code, then the seven-digit phone number. When sending a fax from the U.S. to another country, you usually dial 011, then the country code, then a city code (which is like an area code), then the phone number. (The phone number isn't necessarily seven digits.) Check out the web site www.HowToCall.info, which will give you the specific country and city codes for the place that you're trying to send a fax to.
Other than figuring out the phone number, faxing internationally is identical to faxing domestically. Fax machines in other countries use the same protocols as ones in the United States, so you should have no difficulty communicating with a foreign fax machine. Older fax machines and noisy overseas phone lines may cause the transmission to take a bit longer than you're used to, but it should get there.
The first time you send a fax to another country, it might be a good idea to listen in as the fax machine dials. On some fax machines, you can press the "Dial" button to hear the dial tone, and dial the number manually. Listen for the ring and fax tone, then press the Start button to send the fax. You might want to do this the first time you send a fax overseas, just to make sure it's working as expected.

As you said, the set up is either trying to dial a "9" or other number to access an outside line before dialing your destination number. You will need to get into the menu and delete that command. After that, you should be able to dial out.
Remember to have the fax set to "FAX" not "TELEPHONE" to send and receive automatically.

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 :)

Does it only happen going to one certain fax destination or every destination? There are some things to try on the Lexmark web site.

Go to www.lexmark.com and click Support->Technical Support. Type in 4270 in the 'Search by Model' box. Type in 'Remote fax error' in the 'Search the Knowledgebase' box. There is a topic called 'Problems Sending a Fax to Specific Fax Machines' that has some good general tips.

Steve

see if the line mode is set to tone or dtmf mode.

It will surely help if you are using a calling card that has a pinless dialing feature where you don't need to dial your pin. I use Onesuite.com calling card and it has that feature and sending a fax through regular fax machine is easier than having to dial your pin midpoint.