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Common problems HP Solution Center not working : Adobe Flash Player Error and Unable to scan
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My fax function is not working on my OfficeJet pro8720.

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HP 8720 Officejet Pro
Microsoft Windows 10 (64-bit)

I tried several times to fax a document this morning bur failed and received the following message " A communication error occurred during the fax transmission. I took the document to another location and successfully faxed the document.

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@Fish72, Welcome to HP Support Community!


Check for poor line conditions and resend when conditions improve. If available, try sending the fax through another wall jack and make sure you are using the phone cord that shipped with the fax machine.


Also, refer to the document HP Printers and Fax Machines - Fax Error Code Descriptions for any help with fax issues.


Hope this helps! Keep me posted. 


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