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StarTech.com 1 Port FTDI USB to Serial RS232 Adapter Cable with COM Retention - USB to RS232 Serial Port Adapter
48-port 10/100/1000 switch with 1 open uplink module slot and 1 open backplane stacking module slot, Dual ARM Coretex A9 @ 1 GHz, 2 GB DDR3 SDRAM, up to 190.5 Mpps Throughput, 320 Gbps Routing/switching capacity