| 摘要 |
<p>Subcarriers in the DMT modem scheme are divided and allocated to each data communication unit (2b1 to 2bk) in a subscriber-side system B. For example, four subcarriers of ch10 to ch13 are allocated to a data communication unit (2b1), the next four subcarriers of ch14 to ch17 are allocated to a data communication unit (2b2), and the next four subcarriers of ch18 to ch21 are allocated to a data communication unit (2b3).... Therefore, the data communication units (2b1 to 2bk) can concurrently receive data from a telephone station-side system A, which has received the data from a data communication network N2 or the like, via ADSL.lite modems (3b1 to 3bk) and one telephone line. <IMAGE></p> |
