MFC-6890CDW FAQs & Troubleshooting MFC-6890CDW Not your product? Sort by: Updated Date Popularity 3 Results 1. 19.09.2014 Why doesn't my Brother machine have a dial tone? 2. 11.05.2012 Why doesn't the machine answer when receiving a call? 3. 15.06.2010 I can receive a fax, but cannot receive a telephone call. Telephone FAQs & Troubleshooting