Null Modem cable wiring - THUNDERDOME – the ATARI site
Null modem cable
Amazon.com: DTech DB9 RS232 Serial Cable Male to Female Extension Null Modem Cord Cross TX RX line for Data Communication (15 Feet, Black) : Electronics
10 Foot DB9 Female / DB25 Male Null Modem Serial Cable RS232
Should I Use Null Modem or Straight Through Serial Cables? - NI