Abstract: The power saving device and method are provided. The power saving device which applies to a network apparatus includes a Phase-Locked Loop circuit, a computing module and a clock-selecting register, the Phase-Locked Loop circuit is configured to receive a reference clock frequency and generate a clock frequency-increasing signal according to the reference clock frequency; the computing unit is configured to calculate a setting parameter and the clock-selecting register is configured to generate an operating clock signal according to the clock frequency-increasing signal and setting parameter and send the operating clock signal to the network apparatus, wherein the network apparatus adjusts the clock frequency rate according to the operating clock signal.

Abstract: A network device of an optical network terminal (ONT) includes an optical communication interface, an input interface, a memory and a processor. Wherein the optical communication interface transmits optical signals with adjusted transmission power; the input interface is used to input a distance; the memory stores a plurality of distances, and a plurality of databases respectively correspond to the distances; the processor electrically connects to the optical communication interface, input interface and the memory, and is used to access the database in the memory corresponding to the inputted distance, and then adjust the transmission power of the optical communication interface according to the content in the database. In addition, a method of adjusting the power of optical signals is further provided in this invention.

Abstract: The power saving device and method are provided. The power saving device which applies to a network apparatus includes a Phase-Locked Loop circuit, a computing module and a clock-selecting register, the Phase-Locked Loop circuit is configured to receive a reference clock frequency and generate a clock frequency-increasing signal according to the reference clock frequency; the computing unit is configured to calculate a setting parameter and the clock-selecting register is configured to generate an operating clock signal according to the clock frequency-increasing signal and setting parameter and send the operating clock signal to the network apparatus, wherein the network apparatus adjusts the clock frequency rate according to the operating clock signal.

Abstract: A network device of an optical network terminal (ONT) includes an optical communication interface, an input interface, a memory and a processor. Wherein the optical communication interface transmits optical signals with adjusted transmission power; the input interface is used to input a distance; the memory stores a plurality of distances, and a plurality of databases respectively correspond to the distances; the processor electrically connects to the optical communication interface, input interface and the memory, and is used to access the database in the memory corresponding to the inputted distance, and then adjust the transmission power of the optical communication interface according to the content in the database. In addition, a method of adjusting the power of optical signals is further provided in this invention.