Cisco IE-2000-4TS-B, Ethernet Switch, Network Ports-4, Twisted Pair, Category 5, Gigabit Ethernet, Network 10/100/1000Base-T, Expansion Slots-2, Standard Memory 256 MB, DRAM, Flash Memory 64MB, MTBF 374052 Hour, Input Voltage 60 V DC. The Cisco® Industrial Ethernet (IE) 2000 series is a range of compact, ruggedised access switches aimed at handling security, voice, and other low bandwidth traffic across industrial networks.