Fax gateway, fax machine, and fax transmission system

摘要

A FAX transmission system is composed of: a plurality of first FAX gateways having a function of receiving FAX data from a sending FAX machine over a telephone network and forwarding the FAX data over a communication network other than the telephone network; and a plurality of second FAX gateways having a function of receiving FAX data over the communication network and forwarding the FAX data to a receiving FAX machine over the telephone network. A first FAX gateway in the FAX transmission system acquires, for each second FAX gateway, device information that includes (i) an address on the communication network of the second FAX gateway and (ii) an address on the telephone network of the second FAX gateway or information for acquiring the telephone network address, and transmits the acquired device information to at least one other of the first FAX gateways.