56-port Managed Layer3+ Gigabit switch, 48x Gigabit SFP + 4x Gigabit dual personality (RJ45/SFP) + 4x 10Gbit SFP+ ports, physical stacking of up to 4 units via 10G, IP routing, redundant power supply ftp://ftp.zyxel.com/XGS4600-52F/datasheet/XGS4600-52F_1.pdf