4-Port USB to RS-232 Serial Adapter Hub
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Can a serial port be converted to a USB? - Quora
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Buy RS232 USB to RS232C Serial Port Adapter - CNC Specialty Store
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4-Port USB to RS-232 Serial Adapter Hub
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Amazon.com: StarTech.com 1 Port USB to Serial RS232 Adapter - Prolific PL-2303 - USB to DB9 Serial Adapter Cable - RS232 Serial Converter (ICUSB232V2) : Electronics
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Amazon.com: Plugable USB to Serial Adapter Compatible with Windows, Mac, Linux (RS-232/DB9 DTE Male Connector, Prolific PL2303HX Rev. D Chipset) : Electronics
USB Serial Adapter – Windows 10 Compatible High-Speed RS232 adapter
