Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
What maker and model of fax machine are you asking about, please?
And is that fax machine already capable of sending a fax, as it is now?
Let me know, please. Thanks.
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Settings for receiving a fax are not working then? You may need to enable auto-receive.
In many HP faxing machines, this is done by pressing one button, that turns the auto-receiving light On.