| 摘要 |
A communication method using first and second different transmission speeds in an upstream communications line from user's premises to a central office and a downstream communications line from the central office to the user's premises, respectively, is disclosed. The communication method includes the steps of (a) calculating bandwidth employable for the upstream and downstream communications lines; and (b) allocating the bandwidth between the upstream and downstream communications lines so that the ratio of the first transmission speed to the second transmission speed is set to a certain value.
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