Zyxel XGS-4528F Distribution Switch Ethernet Fiber

XGS4528F is a stand-alone layer 3, Gigabit Ethernet (GbE) switch with two 12 Gigabit stacking ports as well as support for an optional 2-port 10 Gigabit uplink module. By integrating router functions, the Switch performs wire-speed layer 3 routing in addition to layer 2 switching. The XGS-4528F comes with 24 GbE dual personality interfaces. A dual personality interface includes one Gigabit port and one slot for a mini-GBIC transceiver (SFP module) with one port active at a time. The Switch was removed from a working environment. It has no warranties whatsoever. All ethernet ports where tested. I had no way to test the fiber ones but they where working at the time of the removal it was on stack mode with another switch that I already sold. No errors on the switch and all fans are working good. Switch has some scratches that doesn't affects his functionality. This Switxh is an Enterprized Distribution Switch cost Thousands of dollars 580 OBO. Is posted on Ebay.