12 Port L2 Managed Switch Switch with 8 x 10/100/1000BaseT(X) ports & 4 x 100/1000BaseSFP ports - Industrial Gigabit Managed Switch - 8 x 100/1000BasetT Auto-Negotiating Ports - 4 x 100/1000Base SFP slots - Support Single & Multiple rings; Ring coupling; Dual-homing; Chain with link loss recovery < 20ms - IEEE 802.1D/1w/1s Spanning Tree Protocol, 802.3ad Link Aggregation - Port-based VLAN, 802.1Q, 802.1ad Double Tagging (Q in Q), 802.1v Protocol-based VLAN, Private VLAN - IGMP v1/v2/v3, IGMP snooping - IEEE 802.1X authentication Network Access Control, RADIUS or TACACS+ AAA - WEB-based Management and SNMP v1, v2c, v3 - Redundant Input Terminals with Input Voltage Range 12-58 VDC - Power Consumption Max. 17W - Multicast/Broadcast/Flooding Storm Control - IP-30 Ingress Protection - Operating Temperature -40°to 75°C - Environmental Test: Shock - IEC 60068-2-27, Freefall - IEC 60068-2-32, Vibration - IEC 60068-2-6 - Certifications: UL 60950-1, CE, FCC, NEMA-TS2 - Fanless design - DIN-