StarTech.com 10' RS232 Serial Null Modem Cable - 10ft Null Modem Cable - SCNM9FF - Serial Cables - CDW.com
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Amazon.com: 5ft/1.5m 9 Pins 2-3 (TXD-RXD) Null Modem DB9 Male to Female Serial Cable Adopter(Null Modem, Male to Female) : Electronics
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Amazon.com: USB to RS-232 DB9 Female 9 Pin Null Modem Rollover Serial Adapter Cable for Windows,Linux MAC OS (Null Modem) : Electronics
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