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DB25 Male to Female RS-232 Jumper Box
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RS232 pinouts and wiring
DB9 Jumper Box
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D-sub DB9 Breakout Board Connector with Case 9 Pin 2 Row Female RS232 Serial Port Solderless Terminal Block Adapter with Positioning Nuts - Newegg.com
Amazon.com: CableWholesale RS-232 Jumper Box, DB25 Male to DB25 Female : Home & Kitchen
Plastic PCB Jumper Box, DB9 Male / Female - DJB9MF
