Photosmart 7520 - can't send faxes

Question

I've been trying to set this fax machine up for weeks, and I've finally got it to receive faxes, but I can't send them. I always get the error that says Fax Sent - Error 388* "A communication error occurred during the fax transmission. If you're sending, try again and/or call to make sure the recipient's fax machine is ready to receive faxes. If you're receiving, contact the initiator and ask them to send the document again." And one time it said as it was dialing, the receiver was off the hook and it listed a phone number that I never entered before. I've made sure they are ready to receive faxes, and they are. I've also set the Fax Speed to slow like someone recommended and I turned the ECM to off. Is there anything else I'm doing wrong? I have had many people send me faxes, but I just can't get it to send. Can anyone help?

Answer 1

warnock58
Welcome to the HP Community Forum.
Interpreting Error Codes in Fax Communication Error or Fax History Reports
This error translates as a "noisy line". 
The problem with phone lines is that you can use a noisy phone line for voice, that is, using the phone line to make a phone call and talk to someone -- and the problem of a noisy line is not apparent.  Noise on the line is not a problem for voice transmission; many phone lines are "noisy" due to age, animal damage, poor connections, or a variety of other technical issues.
Data transmission is another issue entirely.  "Noise" on the line can be a problem when trying to use that same phone line for transferring data instead of your voice. 
Phone companies guarantee your phone line can be used to make phone calls.  If you want a clean, that is, a "not noisy" data line, in most cases you have to pay for that service.
Another possibility is that the phone line is OK; the location is not.  There may be other electrical interference: motors in heating / cooling equipment, lighting, other electrical issues in the vicinity.
Ideas:
You can try a different phone line in your house.  It is possible the issue is that particular phone line in the house in which you live.  Not all phone lines running through the walls are equal.  Some lines are not connected as well as are others, some lines may have suffered damage, some lines may be older or be of lesser quality materials.
If the issue is not the phone line but the location due to other electrical interference, moving the printer may alleviate the problem.
Make sure all other phones, extra services that use phone lines, are other interference are eliminated from the phone line.
You can call your phone company and plead you case.  Depending on your phone company's policy, your location, the general condition of your phone lines, the location of the "noisy line" problem, your phone company might upgrade or repair your line service.
You can try adding a noise filter to your phone line.
Additional Reference:
HP Photosmart 7520 Series – User Guide
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Dragon-Fur