| 摘要 |
A communication apparatus is provided that includes a modem configured to transition between a normal mode and a power-saving mode, a voltage variation generator configured to generate a voltage variation on a telephone line in response to a transition instruction, a communication controller configured to connect therethrough the modem with the telephone line, and to detect the voltage variation generated on the telephone line by the voltage variation generator, the communication controller being further configured to output a transition signal to cause the modem to transition from the power-saving mode to the normal mode, in response to detecting the voltage variation on the telephone line when the modem is in the power-saving mode. |
