transmitting system using of dying gasp

Ethernet-based dying gas system according to the present invention, in the dying gas system in the communication terminal connected to the Ethernet, the power supply of the Ethernet-based sub-system, and detects a power failure condition to detect the dying gas alarm signal Outputting SMPS; A CPU for receiving a dying gas alarm signal from the SMPS to generate and transmit an alarm packet; A PHY which receives the alarm packet transmitted from the CPU and uplinks the received packet to transmit to the upper stage; It is characterized in that it comprises an L3 switch receiving the alarm packet from the PHY to determine the power failure of the subsystem. According to the present invention, by applying a dying gasp to the Ethernet-based or E-PON-based system in the event of power failure or power failure, an alarm packet can be quickly determined to determine whether there is a power failure of the lower network from the device of the upper network. Can be created and sent.