Ethernet switch. Allows creating IP communication networks between EN 54 devices. Includes 4 Fast Ethernet ports + 2 SFP ports and 2 SFP transceivers. Redundancy: X Ring Pro. RSTP/STP (802.1w/1D). Security: 802.1x, RADIUS. Management: SNMP v1/v2c/v3, WEB, Telnet, standard MIB, private MIB. Dual power input from 12~48V DC and 1 relay output.