MFC-640CW FAQs & Troubleshooting MFC-640CW Not your product? Sort by: Updated Date Popularity 2 Results 1. 16/03/2012 What is Distinctive Ring and how do I program it? 2. 31/03/2006 How do I store One Touch/Speed Dial numbers on my fax machine. More FAQs Telephone FAQs & Troubleshooting