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Amazon.com: PL2303TA USB RS232 to DB9 Cross Wired Rollover Null Modem Cable (Null Modem pinout: 2-TXD, 3-RXD 5-GND, 7-CTS. 8-RT) : Electronics
Null-Modem Serial Cables
Null modem - Wikipedia
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Null modem - Wikipedia
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What is a null modem? RS232 null modem pinout and wiring
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File:D9 Null Modem Wiring.png - Wikipedia
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DB9 Female to DB9 Female Null Modem Cable, 10 Foot Length - Sealevel
