Serial Port 9 Pin Null Modem Adapter DB9 Male / Female RS232
6' Null Modem 9 Pin (DB9) Serial Male - Female Cable
Crossover or "Null Modem" vs. Straight Through Serial Cable - Decisive Tactics, Inc.
StarTech.com 10 ft DB9 RS232 Serial Null Modem Cable F/M - SCNM9FM - Serial Cables - CDW.com
Adapters and Cables - Verifone 9pin Null Modem - Seneca Store
StarTech.com USB to Serial Adapter - Null Modem - FTDI USB UART Chip - DB9 ( 9-pin) - USB to RS232 Adapter - Add a Null Modem RS232 serial port to your laptop
RS232 null modem | Null modem adapter
3ft DB9 F/F Null Modem Cable
StarTech DB9 RS232 Serial Male to Male Null Modem Adapter NM9MM