SI-IES-121D-LRT has one SFP slot and two RJ45 ports. The RJ45 ports support 802.3at (PoE+), and can provide 30W on each copper port for high power applications. The SFP slot provides more flexibility when planning and implementing the network. The slot can accept either a 100m or 1000m SFP module. This makes it possible to easily change the transmission mode and distance of the connection by using a different module. The SFP module is hot-swappable, and there is a dip switch to adjust the LFP function