| 摘要 |
Disclosed is a facsimile device and a method of transmitting facsimile-coded data from a transmitting communications terminal over a communications network to a receiving communications terminal using the facsimile transmission protocol based on ITU-T T.T4 and ITU-T T.30 and an adapted PSTN/mobile videophone protocol. The proposed method involves the following process steps: (a) digital facsimile input data are compressed in the transmitting communications terminal; (b) the compressed facsimile-coded data are divided up by a facsimile adaptation layer and adapted to the underlying multimedia packet multiplex layer; (c) each data block is flagged as a fax data block and forwarded to the multiplex layer; (d) all the data blocks are multiplexed by the transmitting communications terminal using a PSTN/mobile videophone protocol (based on ITU-T H.223 and H.245 in the version of 11/1995) using the multiplex layer, together with any other data blocks which may be present for voice, video, data etc.; they are then transmitted to the receiving terminal where they are demultiplexed; (e) the demultiplexed data blocks are routed to the appropriate dedicated adaptation layer (video, voice, data or fax); the facsimile adaptation layer forwards the facsimile data blocks to undergo a facsimile decompression process according to ITU-T T.4, T.30; and the decompressed facsimile data are output or undergo further processing. |
