Abstract: Various methods and systems are provided for real-time facsimile (fax) transmission over a packet network. In one embodiment, among others, a method includes monitoring fax communications across a pass-through connection and controlling transfer of the fax communications to a fax-relay protocol connection based at least in part upon the monitored fax communications. In another embodiment, a method includes monitoring a state of a state machine communicating over a pass-through connection and, responsive to a re-invite to the fax-relay protocol, transferring from the pass-through connection to a fax-relay protocol connection based at least in part upon the state of the state machine.

Abstract: Various methods and systems are provided for real-time facsimile (fax) transmission over a packet network. In one embodiment, among others, a method includes monitoring fax communications across a pass-through connection and controlling transfer of the fax communications to a fax-relay protocol connection based at least in part upon the monitored fax communications. In another embodiment, a method includes monitoring a state of a state machine communicating over a pass-through connection and, responsive to a re-invite to the fax-relay protocol, transferring from the pass-through connection to a fax-relay protocol connection based at least in part upon the state of the state machine.

Abstract: Binary data relay systems and methods are disclosed to allow users of peer-to-peer (P2P) communications networks designed for voice transport to send facsimile (fax) messages between P2P endpoints by using a computer (102, 104) suitably connected to the network (164). Although not limited to this implementation, this connection preferably uses the Internet to effect the connection between endpoint computers (102, 104). The computer (102, 104) may also be suitably connected to a facsimile terminal (160, 162). The binary data relay systems and methods provide the facsimile communications function, such as that usually provided by a stand-alone Group 3 facsimile terminal (160, 162), over the P2P network (164) intended for voice transmission, such as but not limited to, the Skype network. Such P2P network (164) is an overlay of the Internet, but is not limited to the Internet.