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USB to RS232 Serial Converter -- DataPro
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USB to RS232 DB9 Serial Adapter Cable - Serial Cards & Adapters | StarTech.com France (en)
USB 4-Port Serial Adapter / USB 2.0 Quad Port Serial DB-9 RS-232
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USB to Serial adapter for the FLEX-6000 series – FlexRadio
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
HP USB to Serial Port Adapter J7B60AA B&H Photo Video
