StarTech.com 2-Port PCI Express Serial Card with 16C1050 UART - RS232 - PEX2S1050 - Serial Adapters - CDW.com
StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe to Dual Serial DB9 RS232 Controller - PEX2S553 - Serial Adapters - CDW.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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