MFC-3820CN FAQs & Troubleshooting MFC-3820CN Not your product? Sort by: Updated Date Popularity 2 Results 1. 16/09/2014 Verify if the Brother machine has a dial tone 2. 15/11/2005 Can I still receive faxes or calls when the machine is in power save mode? More FAQs Telephone FAQs & Troubleshooting