Patent ID: 8670300
Filing Date: 2014-03-11
Classification: H04L,H04M

Abstract:
1. A network device, comprising: a communication port; a system-on-a-chip (SoC), operated under a first DC operation voltage and a second DC operation voltage, wherein the SoC is used for generating a dying gasp signal when the network device runs out of power; a line driver, coupled between the communication port and the SoC, and operated under the second DC operation voltage and a third DC operation voltage, wherein the line driver is used for receiving and amplifying the dying gasp signal from the SoC, and transmitting the amplified dying gasp signal to a central office (CO); a first conversion unit, coupled to the SoC and the line driver, for receiving and converting a DC input voltage, so as to generate the first DC operation voltage and the second DC operation voltage; a second conversion unit, coupled to the line driver, for receiving and converting the DC input voltage, so as to generate the third DC operation voltage; a first energy-storage unit, coupled to the first conversion unit, for providing a first DC power relating to the DC input voltage to the first conversion unit when the network device runs out of power; and a second energy-storage unit, coupled to the second conversion unit, for providing a second DC power relating to the DC input voltage to the second conversion unit when the network device runs out of power.