Network Ports-48, Expansion Slots-6, Expansion Slot SFP+, QSFP+, SFP+ Slots-4, Twisted Pair, Gigabit Ethernet, Network 10/100/1000Base-T, Rack-mountable, Network (RJ-45) Ports-48, Flash Memory 512 MB, SDRAM, Input Voltage 110 V AC, 220 V AC, Standard Memory 2 GB. The HP 5900 Switch Series is a family of high-density, ultra-low-latency, top-of-rack (ToR) switches that is part of the HP FlexNetwork architecture's HP FlexFabric solution.