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CC2045B-FF - DB9 Female to Female Standard Serial RS232 Null Modem Adaptor
Crossover or "Null Modem" vs. Straight Through Serial Cable - Decisive Tactics, Inc.
Rocstor Premium 5ft 1 Port USB to Null Modem RS232 DB9 Serial DCE Adapter Cable with FTDI - 1 x DB-9 Female Serial - 1 x USB Type A Male - Black - RS232 Serial Adapter - Y10C225-B1
Amazon.com: C2G 08075 DB9 Male to DB9 Female Serial RS232 Null Modem Adapter, Beige : Electronics
new Mini Null Modem DB9 feMale to DB9 feMale plug Adapter Gender Changer | eBay
Null Modem DB9 Male to DB9 Female Mini Adapter 9Pin Connector RS232 Crossover | eBay