Tested for IEC 61850 and IEEE 1613 IEEE 802.3 Layer-2,Layer-3 industrial switches Fastest Redundant Ethernet Ring-(recovery time < 10ms over 250 units of connection) Multiple Redundant Ethernet technology RSTP/STP/MSTP Configurable by Web-based Gigabit modules available Rugged, enterprise-class networking Advanced security features Powerful Management & Monitoring Rugged industrial DIN rail and Rack mount options Available in Ethernet to fiber Media Converter and Supports full/half duplex operation Support PTP Client (Precision Time Protocol) clock synchronization Available in SM, MM FO. Approved.