The ComNet RLGE2+1SMS is a substation-rated and industrially hardened three-port self-managed switch with uplink management functionality. Fully compliant with the requirements of IEC 61850-3, IEEE 1613 Class 2, EN50155, and NEMA TS-1/TS-2, it is designed for deployment in environments where high levels of electromagnetic noise and interference (EMI) and severe voltage transients and surges are routinely encountered, such as electrical utility substations and switchyards, heavy manufacturing facilities, trackside and roadside electronic equipment, and other difficult out-of-plant applications. The DIP-switch-selectable 100BASE-FX or 1000BASE-FX port supports conventional CAT-5e/CAT-6 copper or optical transmission media by selection of the appropriate ComNet SFP* module. User-selectable link fault pass-through provides remote indication of a network fault, and two summary fault alarms provide a local or remote indication via dry contact closures in the event of loss of optical link or operating power. The 10/