LRES2025PT-T is a PCI Express v2.1 x4 four-port copper Gigabit Ethernet network adapter developed by Shenzhen Lianrui Electronics Co.,Ltd. based on the controller solution designed and produced in China. This adapter can be compatible with PCle x8 and x16 at the same time and backward compatible with PCle v1.0. The adapter card achieves a four-port bidirectional communication transfer rate with a theoretical throughput of 8GB on a PCI Express v2.1 x4 bus. The Ethernet optical fiber network card(LRES2025PT-T)with China's independent intellectual property rights launched by Shenzhen Lianrui Electronics Co.,Ltd.has a fully integrated Gigabit Ethernet media access control (MAC) module. It is widely used in fiber-to-the-desktop network communication, and can also be used on PC servers,embedded and other network devices. The main controller used by the optical fiber network card has China's independent intellectual property rights and independent controlability, which is of great significance for breaking the monopoly of certain enterprises and ensuring information security.?The controller used by LRES2025PT-T is autonomous and controllable. The indicators induding data transmission,data network bandwidth, average transmission delay, and actual small packet transmission rate have reached the industry level.