FAX-2850 FAQs & Troubleshooting FAX-2850 Not your product? Sort by: Updated Date Popularity 2 Results 1. 15/12/2014 I am using Voice Over Internet Protocol (VoIP) and cannot send and/or receive faxes. What can I do? 2. 14/05/2013 I am experiencing problems sending a fax, what can I do? Fax FAQs & Troubleshooting