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null modem with loop back serial cable pinout | Modem, Electronics mini projects, Electronics circuit
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Pl2303TA USB RS232 to DB9 Cross Wired Rollover Null Modem Cable (Standard pinout: 2-RXD, 3-TXD, 5-GND, 7-RTS 8-CTS): Amazon.co.uk: Computers & Accessories
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DB9-F-RJ45-NULL | Binary DB9 Female to RJ45 Modular Adapter with Null Modem Pinout | Snap One | AV-iQ
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serial - Can't figure out EIA-232 (RJ45) to DB9 cable... (seems simple!) - Electrical Engineering Stack Exchange
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