| 摘要 |
A facsimile device and a method for transmitting facsimile coded information from a transmitting communications terminal, through a communications network, to a receiving communications terminal by using the facsimile transmission protocol based on ITU-T T.T4 and ITU-T T.30 and an adapted PSTN mobile videophone protocol, said method involving the following steps: a) digital facsimile input data are compressed in the transmitting communications terminal; b) the compressed facsimile coded data are divided up by an adaptation layer and adapted to the underlying multimedia packet multiplex layer (ML) in accordance with H.223; c) each data block is flagged as a facsimile information control block or facsimile information data block and forwarded to the multiplex layer; d) all the information data blocks are multiplexed by the transmitting communication terminal using a PSTN/mobile video protocol based on ITU-T H.223 and H.224.5 (in the version of 11/95) using the multiplex layer, together with any other information blocks for speech, video, data, etc.; that may be present; they are then transmitted to the receiving communications terminal, where they are demultiplexed;. e) the demultiplexed data blocks are each routed to the appropriate dedicated adaptation layer (voice, video, data, or facsimile); the facsimile adaptation layer forwards the facsimile data to undergo a facsimile decompression process according to ITU-T T.4, T.6 or T.30, and the decompressed facsimile data are output or undergo further processing.
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