FAQs & Troubleshooting FAQ Search Results MFC-8510DN Not your product? Search by FAQ ID number Search Back to FAQs & Troubleshooting. 2 Results 1.faq00002757_010 Change or delete an existing One Touch or Speed Dial number. 2.faq00002757_009 Change or delete an existing One Touch or Speed Dial number. (For users using the machine with the Internet Fax function) FAQs & Troubleshooting