| 摘要 |
A HomePNA device with the function of transmitting power over a network wire, which connects to another HomePNA device via the network wire and transmits power using a non-data signal line in the communications protocol. The HomePNA device contains a first and second network wire connection ports for network wire terminals to plug in so as to receive and transmit data signals according to the communications protocol and to receive or transmit power provided via the non-data signal line; a power input port, which receives the external power provided through the power terminal and has a switch; and a plurality of sets of phone line connection ports for connecting data transmitting phone lines to the computer host. When the power input terminal is plugged with a power terminal, the switch is inactive and connects the non-data signal line of the first network connection port to the non-data signal line of the second network connection port and an internal control circuit. At the moment, the network device uses the power provided through the non-data signal line of the first network connection port to function. When the power input port is plugged with a power terminal, the switch functions and connects the power signal line of the power terminal to the non-data signal line of the second network connection port and the internal control circuit. In this case, the network device uses the power provided from the power terminal to function.
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