StarTech.com 10' RS232 Serial Null Modem Cable - 10ft Null Modem Cable - SCNM9FF - Serial Cables - CDW.com
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RS232 Cable 15ft, Null Modem DB9 to DB9 Serial Cable Male to Male RS-232 Cord Cross TX RX line for Data - Walmart.com
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QVS DB-9 RS 232 Serial Female to DB-9 RS 232 Serial Female Null Modem Cable 6 ft. - Beige - Micro Center
StarTech.com USB to Serial Adapter Null Modem FTDI USB UART Chip DB9 9 pin USB to RS232 Adapter - Office Depot
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