The IESMGR Industrial Managed Switch Series is a rugged, high‑performance Ethernet switching platform designed for mission‑critical industrial networks, power substations, SCADA systems, automation, and transportation applications. These switches support flexible Gigabit port combinations (RJ45 + SFP), advanced redundancy technologies such as DTRing, DRP/DHP, MRP, and ERPS for fast recovery (<20–50 ms), and robust L2/L3 networking with VLAN, QoS, multicast, and routing features. They ensure secure and stable operation with cybersecurity features (HTTPS, SSH, 802.1X, ACLs) and precise synchronization through IEEE 1588v2 / PTPv2. Built with IP40 metal housing, fanless cooling, dual redundant AC/DC power inputs, and wide temperature support (–40°C to +75/85°C), the series meets industrial standards including IEC 61850‑3, IEEE 1613, and IEC 61000‑4 EMC, delivering reliable performance in harsh environments.