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IEC 61850-3 managed rackmount Ethernet switch with 20 100BaseFX ports (MST), 4 10/100BaseT(X) ports, and 4 1000BaseSFP ports, for a total of up to 28 ports, 2 isolated power supply (88-300 VDC or 85-264 VAC), -40 to 85°C operating temperature Ethernet Interface 10/100BaseT(X) Ports (RJ45 connector) 4 1000BaseSFP Slots 4 100BaseFX Ports (multi-mode ST connector) 20 Optical Fiber Optical Fiber Read more Cabling Direction Front cabling Standards IEEE 802.1D-2004 for Spanning Tree Protocol IEEE 802.1p for Class of Service IEEE 802.1Q for VLAN Tagging IEEE 802.1s for Multiple Spanning Tree Protocol IEEE 802.1w for Rapid Spanning Tree Protocol IEEE 802.1X for authentication IEEE 802.3 for 10BaseT IEEE 802.3ab for 1000BaseT(X) IEEE 802.3ad for Port Trunk with LACP IEEE 802.3u for 100BaseT(X) and 100BaseFX IEEE 802.3x for flow control IEEE 802.3z for 1000BaseSX/LX/LHX/ZX Ethernet Software Features Filter 802.1Q, GMRP, GVRP, IGMP v1/v2c, Port-based VLAN, VLAN unaware Industrial Protocols EtherNet/IP, Modbus TCP Management Back Pressure Flow Control, BOOTP, DHCP Option 66/67/82, DHCP Server/Client, Flow control, HTTP, IPv4/IPv6, LLDP, Port Mirror, RARP, RMON, SMTP, SNMP Inform, SNMPv1/v2c/v3, Syslog, Telnet, TFTP, Fiber check MIB Bridge MIB, Ethernet-like MIB, MIB-II, P-BRIDGE MIB, Q-BRIDGE MIB, RMON MIB Groups 1, 2, 3, 9, RSTP MIB Power Substation IEC 61850 QoS, MMS, Configuration Wizard Redundancy Protocols Link Aggregation, MSTP, RSTP, STP, Turbo Chain, Turbo Ring v1/v2 Security Broadcast storm protection, HTTPS/SSL, TACACS+, Port Lock, RADIUS, Rate Limit, SSH Time Management