StarTech.com 10' RS232 Serial Null Modem Cable - 10ft Null Modem Cable - SCNM9FF - Serial Cables - CDW.com
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Amazon.com: Letotech Cross Wired USB Serial Cable DB9 CP2102 ZT232 USB RS232 to DB9 Null Modem Cable PC Control TV Cable (Null Modem Pinout) : Electronics
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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
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