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Amazon.com: TRENDnet USB to Serial 9-Pin Converter Cable, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 21 Inch Cable Length,
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Uport 1650-16 USB to 16-port RS-232/422/485 Serial Hub - Webshop Hatteland Technology - Sweden
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RS-232 Cables, Wiring and PinoutsRS-232 Cables, Wiring and Pinouts - PBXDom
Communication ports
