MFC-7820N FAQs & Troubleshooting MFC-7820N Not your product? Sort by: Updated Date Popularity 3 Results 1. 01/20/2014 I'm using Voice Over Internet Protocol (VoIP) and am having problems receiving faxes. 2. 05/10/2013 Why doesn't the machine answer when receiving a call? 3. 12/18/2008 I am experiencing problems receiving faxes. What can I do? Fax FAQs & Troubleshooting