Connective Peripherals ES-U Series - Figure 8 - ES-U-3008-RM Has a Set of Jumpers for each Port (One Set Circled)

USB to Serial Converters Manual
Version 2.0
Document Reference No.: CP_000032 Clearance No.: CP#022
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Figure 8 - ES-U-3008-RM has a set of jumpers for each port (one set circled)