FAX-1840C FAQs & Troubleshooting FAX-1840C Not your product? Sort by: Updated Date Popularity 2 Results 1. 06/20/2012 Hear the dialing, ringing, and fax-receiving tones while I'm sending a fax. 2. 08/29/2006 Can I confirm that the FAX was sent correctly? Fax FAQs & Troubleshooting