Copper SFPs (Small Form-factor Pluggable copper transceivers) are compact, hot-pluggable modules that convert an SFP or SFP+ port on a switch, router, or server into a standard RJ45 Ethernet interface. The industry-standard Cisco Small Form-Factor Pluggable (SFP) Gigabit Interface Converter (Figure 1) links your switches and routers to the network. The hot-swappable input/output device plugs into a Gigabit Ethernet port or slot. By allowing standard copper cabling (Cat5e/Cat6/Cat6a) to plug directly into modular networking. For the shortest connections, passive copper direct attach cable (DAC) is a simple and cost-effective solution. 1GbE SFP optical transceivers include short-reach (SX), and long-reach (LX). It features an RJ45 connector type and is capable of supporting hot plugging. Notably, the transmission distance of the copper module typically ranges from 10 to 30. Copper SFP modules help organizations leverage an existing copper infrastructure, not only saving the cost of rewiring, but also continuing the ever-changing world of optical fiber. To learn about practical adapter solutions that enable flexible network designs integrating both copper and fiber. If you intend to use the optical port in your switch, server, media converter or router for copper UTP transmission, you will need an SFP or SFP+ RJ45 transceiver, also known as TX module.