Crosses the data transmission lines in straight-through serial cables
Null Modem Adapter DB9 Female to DB9 Female
Connects any RS232 serial device with DTE DB25 to PC with DB25 serial port. This also works as RS232 serial null modem cable for any standard serial applications.
Micro Connectors 6'Null modem cables and adapters connect two serial devices that require a null modem (cross-wired) configuration. cable has a DB9 female connector on one end and a DB25 male connector in the other end. See Documentation
This null modem cable allows you to transfer files between two computers using its DB9 serial port as well as all RS232 DTE to DTE connections.