MFC-665CW FAQs & Troubleshooting MFC-665CW Not your product? Sort by: Updated Date Popularity 2 Results 1. 15/05/2013 I am using Voice Over Internet Protocol (VoIP) and I'm having problems receiving faxes. 2. 25/04/2013 Why doesn't the machine answer when receiving a call? Fax FAQs & Troubleshooting