Crossover or "Null Modem" vs. Straight Through Serial Cable - Decisive Tactics, Inc.
Null Modem vs Straight | Cable Differences | ShowMeCables.com
Null-Modem Serial Cables
FTDI Chipset Cross Wired USB Serial DB9 FT232R USB RS232 Cable de módem nulo Cable de TV de control (estándar DB9 COM puerto pinout (pc(host) con USB a RS232 dispositivo terminal (esclavo)) :
Should I Use Null Modem or Straight Through Serial Cables? - NI
What is a null modem? RS232 null modem pinout and wiring