D-Link DGS-1530-28/E

24 Ports Gigabit for downlink 4 Ports 10G SFP+ for uplink 6kV surge protection on all Gigabit Ethernet ports Physical stacking up to 9 switches Support Redundant Power Supply (RPS) ZTP (Zero-Touch Provisioning) Ethernet Ring Protection Switching (ERPS) IEEE 802.1ag for Connectivity Fault Management ITU-T Y.1731 for Delay Measurement Massages Manage through the Nuclias Network Controller.