This adapter by Delock can be connected to the Sub-D 9 pin port of your device or system to use it as a null modem. Furthermore you it converts a standard serial cable into a null modem cable. Thus you can use to connect two computers directly.
• Sub-D 9 pin male > Sub-D 9 pin female (only 8 pins connected)
• Sub-D 9 female with screw nuts
• Sub-D 9 male with screws
• A free Sub-D9 pin interface
• Sub-D 9 adapter
• Delock poly bag