MFC-L3750CDW FAQs & Troubleshooting MFC-L3750CDW Not your product? Sort by: Updated Date Popularity 4 Results 1. 12/20/2018 Set the F/T Ring Time (Fast Double-ring) 2. 12/20/2018 Set the Number of Rings Before the Machine Answers (Ring Delay) 3. 06/13/2017 Use voice mail on the same line as my Brother machine. 4. 06/13/2017 What is Distinctive Ring and how do I program it? Telephone FAQs & Troubleshooting