The TP-Link SM331T is a 1000BASE-T RJ45 SFP module designed to provide a flexible copper connection for your network equipment. It allows you to convert an SFP slot into a standard Ethernet port, supporting data transmission rates of up to 1.25 Gbps and complying with the IEEE 802.3-2002 and SFP MSA standards. This compact device measures 67.4 x 13.75 x 13.8 mm and operates on a 3.3V power supply within a temperature range of 0 °C to 70 °C. By using Cat5e cabling, you can establish a stable link over distances up to 100 meters, making it useful for connecting nearby switches or servers without needing fiber optics. Because it is hot-swappable, you can install or replace the module without powering down your hardware. As part of the Omada product line, this module offers broad compatibility across various vendors, including Cisco, Huawei, Ubiquiti, D-link, Netgear, and Mikrotik. This versatility makes it a practical choice for network administrators who manage mixed-brand environments and need a reliable way to integrate copper Ethernet links into their SFP-based infrastructure.