Cabletron Systems SEHI-24 Hubstack Ethernet Hub

The Cabletron Systems SEHI-24 HubStack Ethernet Hub is a 24-port 10BASE-T stackable Ethernet hub with intelligence (SEHI) that combines standard repeater functionality with HubSTACK interconnect for scalable networking. It can form a stack with up to four SEH hubs via the rear-panel HubSTACK Interconnect bus, for a total of five devices in a single stack. Front-panel EPIM ports (two on the SEHI-24 family) accept Ethernet Port Interface Modules, expanding media to UTP/STP copper, multimode fiber, single-mode fiber, or thin coax, while LANVIEW LEDs provide status monitoring. Power is universal (100–125 VAC or 200–240 VAC, 50–60 Hz), it supports tabletop or 19-inch rack mounting, and operating conditions are 5°C to 50°C with 5–95% humidity (non-condensing), plus built-in polarity detection, correction, and fault protection for stack reliability.