| 摘要 |
<p>A LAN rely system of the present invention includes: a LAN monitoring device monitoring the operation state of LAN a LAN signal expander and identifying whether an Ethernet switch side has a fault or whether a subscriber side has a fault, a LAN signal expander expanding a transmission distance by using pulse amplitude modulation (PAM) 4 to an Ethernet signal, a hybrid LAN signal expander transmitting voice call and Ethernet signals simultaneously by using four phone lines, wherein a transmission distance is expanded by using the PAM 4, a power over Ethernet (PoE) based hybrid LAN signal expander being a device obtained by adding a PoE module to the hybrid LAN signal expander, wherein the power over Ethernet (PoE) based hybrid LAN signal expander enables a subscriber side to use the hybrid LAN signal expander without a separate power supply, and a processor enabling the LAN monitoring device, the LAN signal expander, the hybrid LAN signal expander, and the power over Ethernet (PoE) based hybrid LAN signal expander to be selectively used according to a user selection. ice node, and transmitting the selected and scheduled content to the intermediate node.</p> |
