StarTech.com 10' RS232 Serial Null Modem Cable - 10ft Null Modem Cable - SCNM9FF - Serial Cables - CDW.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
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Tripp Lite 6ft Null Modem Serial DB9 RS232 Cable Adapter Gold M/F 6' - null modem cable - DB-9 to DB-9 - 6 ft - P454-006 - Serial Cables - CDW.com
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