MFC-7420 FAQs & Troubleshooting MFC-7420 Not your product? Sort by: Updated Date Popularity 2 Results 1. 12/02/2009 How do I adjust the settings of the ring volume, beeper volume and speaker volume on my Brother machine? 2. 13/01/2009 What is Distinctive Ring and how do I program it? Telephone FAQs & Troubleshooting