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8-Port RS-232 USB to Serial Adapter Data Control Box
StarTech 4-Port USB to Serial Adapter Hub with COM ICUSB2324X
4-Port USB to RS-232 DB9 Serial Adapter w/ Prolific Chipset
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32 Port RS-232 USB-to-Serial Adapter - Coolgear
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USB to RS-232 DB9 1-Port Serial Interface Adapter - Sealevel
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USB to RS232 Hub (4-Port / Industrial) – CommFront
4 Port Professional RS-232 USB 2.0 to Serial Adapter
8-Port Terminal Block RS232/422/485 to USB Isolation/Surge Protection
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