Digital faxing through existing fax servers

Abstract

Traditional fax servers may be improved to interoperate with secure fax servers, enabling high-resolution, color fax receipt by the traditional fax server in addition to traditional low-resolution, black-and-white fax receipt. A process for authenticating and registering allows the traditional fax server to receive digital faxes sent through the secure fax server. Further, an automated registration process allows sending to any existing fax number through the secure fax server. If no verified destination is known, a traditional fax is sent. If that reaches a interoperable traditional fax server, the number may be verified, digital fax retrieved, and all future faxes to that number through the secure fax server delivered as high-resolution color digital faxes. This enables seamless fax quality upgrades within existing fax servers.