MFC-820CW FAQs & Troubleshooting MFC-820CW Not your product? Sort by: Updated Date Popularity 3 Results 1. 09/19/2014 Why doesn't my Brother machine have a dial tone? 2. 05/10/2013 Why doesn't the machine answer when receiving a call? 3. 06/15/2010 I can receive a fax, but cannot receive a telephone call. Telephone FAQs & Troubleshooting