The high‑performance industrial Layer‑3 (L3) managed backbone switch is designed for mission‑critical networks in power utilities, substations, transportation, and heavy industrial environments. It offers flexible Gigabit configurations with RJ45 and SFP ports and supports advanced fast‑recovery redundancy technologies such as DTRing and DRP/DHP (20–50 ms), along with comprehensive L3 routing functions including OSPF, RIP, VRRP, static routing, and multicast PIM. The switch provides strong cybersecurity through IEC 62443‑42 compliance, HTTPS, SSH, 802.1X, RADIUS/TACACS+, and ACL filtering, as well as precise PTPv2 time synchronization. Built with IEC 61850‑3‑class robustness—high EMC immunity, vibration/shock resistance (IEC 60068‑2‑6/27/32), redundant power inputs, and fanless IP40 metal housing—it ensures reliable operation across wide temperature ranges (–40°C to +75°C), making it ideal for substation automation and harsh industrial applications.