C1D2 and ATEX compliant for harsh industrial environments application Compact IEEE 802.3 Layer 2 industrial switches Plug-and-play functionality. Support store and forward transmission Duplex and cable sensing Support auto-negotiation and auto MDI/MDI-X Hardened for the toughest applications SM, MM FO, Giga Ports available. Fastest Redundant Ethernet Ring-(recovery time < 10ms over 250 units of connection) Multiple Redundant Ethernet technology RSTP/STP