MFC-820CW FAQs & Troubleshooting MFC-820CW Not your product? Sort by: Updated Date Popularity 3 Results 1. 15/05/2013 I am using Voice Over Internet Protocol (VoIP) and I'm having problems receiving faxes. 2. 10/05/2013 Why doesn't the machine answer when receiving a call? 3. 24/05/2006 I cannot receive a color fax. Why? Fax FAQs & Troubleshooting