IEC 61850-3 modular managed rackmount Ethernet switch system with 1 slot for Fast Ethernet modules and 1 slot for Fast Ethernet or Gigabit Ethernet modules, for a total of up to 10 or 8+2G ports, cabling on top panel, 1 power supply (88-300 VDC or 85-264 VAC), -40 to 85°C operating temperature