MFC-7450 FAQs & Troubleshooting MFC-7450 Not your product? Sort by: Updated Date Popularity 3 Results 1. 20/01/2014 I'm using Voice Over Internet Protocol (VoIP) and am having problems receiving faxes. 2. 17/01/2014 I am having a problem receiving faxes. 3. 25/04/2013 Why doesn't the machine answer when receiving a call? Fax FAQs & Troubleshooting