Tripp Lite Keyspan High Speed USB to Serial Adapter - serial adapter - USB - RS-232 - USA-19HS - USB Adapters - CDWG.com
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StarTech.com 4 Port PCI RS232 Serial adapter card - PCI - serial - 4 ports - Add 4 high-speed RS-232 serial ports to your PC through a PCI expansion slot - pci
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StarTech.com 16 Port PCI Express Serial Card - High-Speed PCIe Serial Card - expansion module - PCIe 1.1 - RS-232 x 2
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