Hello! i have an ongoing probelm with my hp 7310 all in one. when i fax something i cannot hear the sound for the numbers i'm dialing nor can i hear the sound telling me the fax went through ( i literally have to put my ear to the machine and i can hear the appropriate sound very faintly). i have checked all my volumes for which they are on loud and i have turned the machine off as well as checked all plugs. my fax goes through however no sound. thank you in advance for your help!

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Try using the HP Scan Diagnostic Utility in Windows - HP Customer Care (United States - English)

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Using the HP Network Diagnostic Utility in Windows - HP Customer Care (United States - English)

Your HP all-in-one provides three levels for adjusting the ring and speaker volume. The ring volume is the volume of the phone rings. The speaker volume is the level of everything else, such as the dial tones, fax tones, and button press beeps. The default setting is Soft.
1 Press Setup.
2 Press 4, and then press 8.
This displays the Basic Fax Setup menu and then selects Ring and Beep Volume.
3 Press to select one of the options: Soft, Loud, or Off.
Note If you select Off, you will not hear a dial tone, fax tones, or incoming ring
tones.
4 Press OK.

A) Run the fax test on the printer itself to see if it's connected properly and has an active phone line.. HP All-in-one printers still make a dial tone sound even if they aren't connected to a phone line. To run the test 1)..Press the SETUP button. Press the down arrow button until "Tools" is highlighted then pres OK. 2) Press down arrow key again and select "Run Fax test" The printer will then print out the results. It will tell you if anything fails. If it does, the correct the problem it mentions. IF everything passes, then the problem is likely your cable phone line which is a "Digital" and Fax machines still use an analog signal. Here is what you can try to overcome the deficiencies in a cable phone system. 1) Set your fax speed to Medium 2) Turn your ECM (Error correction mode) OFF
To set your fax speed, Press the SETUP button again.. Press your down arrow again until you find "Advanced Fax Settings" and the press OK.. arrow down until you find "Fax Speed" and hit OK. Then choose Medium (14,400) and press OK This will take you to your previous menu (Advanced Fax setings).. Find "ECM Choose OK again.. Then choose OFF and press OK. Press the X button on your printer's control panel and then Retry your fax.. Hope this helps

Error 389 when I dial a specific number. Other numbers work okay. HP 7200 all-in-one. Previously did not have problems with this number. Archie

Your problem is how you have set up your long distance carrier. You may not be able to use your fax if you must first go through a phone card system. However, sometimes you can use enough pauses in your fax dialing to get through it. If your long distance carrier is your local phone company, they SHOULD be able to tell you how to dial.

According to the HP manual for this unit:

1. Verify that your HP all-in-one is set to answer fax calls automatically. (Press the Auto Answer button so the light is on.)
2. Press Setup.
3. Press 5, and then press 1.This displays the Advanced Fax Setup menu and then selects Answer Ring Pattern.
4. Press the down arrow key to highlight an option, and then press OK. When the phone rings with the ring pattern assigned to your fax phone line, the HP all-in-one answers the call and receives the fax.

You can download the manual from HP here if you've misplaced yours and need more setup information.

once you dial the number you fax will automatically start sending the the Fax signal which sounds like short beeps. This is done so the receivers phone (when answered) will recognized the beeps and switch to fax receive mode.  If you are getting the recording that you mentioned above, that means the number you dialed was not successful in making the connection.  Once you dial the number you should hear the phone ringing followed by some churping noises when the other end answers the call... then other churping and gargle like sounds initially as the fax proceeds.  
sounds like your are having trouble with the number you are dialing.
Hope this helps..
~enov8

I use a calling card for long distance faxes. You don't have to "set" anything. They just mean listen to the printer. I am not at home right now to get the specific steps, but I believe all you do is put your fax stuff in the document feeder (I don't know if you can do this directly from the computer) and enter the 1-800 number from your calling card. Then the calling card will ask for your options and you will hear it from printer. That's what they mean by monitor. Then just follow the prompts.

From what your saying, the problem is not on your end, but on the receiving end. The other fax is not answering the call.