POE Switch CKP Series DIN-Rail Industrial POE Switches IGMPv1/v2, GMRP, GVRP, SNMPv1/v2C/v3 DHCP Service/Client, TFTP, SNTP POE SwitchIndustrial Ethernet switches, industrial ... Class of ServiceIEEE 802.3X for AuthenticationIEEE 802.3ad for Port Trunk with LACP Protocols:IGMPv1/v2, GMRP, GVRP, SNMPv1/v2C ... : IEC 60068-2-6EN61000-4-5(Surge),level3;EN61000-4-8 DIN-Rail Industrial POE Switch