Patent ID: 8107889

Claim:
A transceiver device, suitable for an Ethernet network, the transceiver device comprising: an attenuation estimation module, coupled to a transmission path, for estimating an attenuation value caused when a signal passes through the transmission path, wherein a signal is outputted from a far-end device through the transmission path, and the far-end device changes a coding manner of the signal according to a receiving capacity of the far-end device; a transmitter, coupled to the transmission path, for outputting a transmission signal; and a control module, coupled to the attenuation estimation module and the transmitter, for adjusting an output power of the transmitter to be lower when the attenuation value is smaller than a default value; and a timer, for timing a period of time; and a receiver, coupled to the transmission path, the timer, and the control module, for checking whether a confirmation signal outputted from the far-end device is received or not in the above period of time, wherein the confirmation signal indicates that the far-end device can receive the transmission signal correctly, when the receiver does not receive the confirmation signal in the above period of time, the control module resets the output power of the transmitter.