MFC-L3770CDW FAQs & Troubleshooting MFC-L3770CDW Not your product? Sort by: Updated Date Popularity 4 Results 1. 20.12.2018 Set the F/T Ring Time (Fast Double-ring) 2. 20.12.2018 Set the Number of Rings Before the Machine Answers (Ring Delay) 3. 13.06.2017 Use voice mail on the same line as my Brother machine. 4. 13.06.2017 What is Distinctive Ring and how do I program it? Telephone FAQs & Troubleshooting