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AssigneeInternational Telephone and Telegraph Corporation
InventorsWilliam C. Crager, Sudhindra R. Umarji, Robert H. Griffin, Gerard J. Louit
Estimating the term…
A packet-switched facsimile communication system operable in a store-and-forward mode is provided for enabling substantially simultaneous full-duplex communication between a plurality of telecommunications terminals, such as facsimile transceivers, over a communications network with a plurality of other facsimile transceivers having access to the communications network and with which such communication is desired. The disclosed packetizing of data and transmission thereof in a store-and-forward mode with dynamic routing provides a highly efficient utilization of the transmission facilities, substantially error-free data transmission and a handshake capability between a wide variety of dissimilar and otherwise incompatible facsimile machines having differing protocols, modulation techniques and other speed and code characteristics. Large blocks of data and other message information from facsimile data terminals are subdivided into data packets prior to transmission, converted into a systemwide compatible protocol, compressed, transmitted independently and time multiplexed with other packetized data from other terminals on the communications network, stored and forwarded on a priority basis and in accordance with network availability at one or more switching nodes in the network, reassembled from the received packets at a destination processor into the original data messages for coupling to the message destination terminals such that the received message is decompressed and reconverted into a format compatible with the destination terminal characteristics to enable information interchange therebetween.
A packet-switched facsimile data communications system comprising:
A packet-switched facsimile data communications system operable in a store-and-forward mode for providing bidirectional communication between a plurality of source and destination facsimile data terminals at a plurality of locations over a communications network comprising:
A packet-switched communication system for transmitting facsimile messages between a plurality of facsimile machines having differing operating characteristics, comprising:
A full-duplex facsimile communications system comprising processing means at a first location and processing means at a second location, each of said processing means comprising:
A method for the transmission of facsimile message information from a first facsimile terminal to a second facsimile terminal over a communications network, comprising the steps of:
Dependencies are inferred from the claim text.