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
Null-Modem Serial Cables
RS232 null modem | Null modem adapter
Should I Use Null Modem or Straight Through Serial Cables? - NI