| 摘要 |
A digital subscriber line modem 200 comprises a first part 210 operable to operate in accordance with a high bandwidth Digital Subscriber Line protocol and a second part 220 operable to operate in accordance with a low bandwidth Digital Subscriber Line protocol, wherein the second part is arranged to operate continuously whilst the first part is arranged to transition into a low power mode, in which less or no data is transmitted or received by the first part, when the demand for bandwidth over the connection falls below a predetermined amount. The modem 200 additionally includes a router 240 which controls the sending of data via the first and second parts as appropriate and controls the aggregation of data received via the two parts. The modem also includes a service splitter 230 for passing signals received from a copper twisted pair forming a communications link 10 via which the modem 200 communicates with another modem 100 to either the first part or the second part as appropriate based on the frequencies of the received signals. |
