Our software library provides a free download of SUDT SerialNull 1.7.0.699. The most recent setup file that can be downloaded is 563 KB in size. The most popular version among SUDT SerialNull users is 1.7. This software is an intellectual property of SUDT Studio. The latest version of the software is supported on PCs running Windows XP/7/8/10/11, 32-bit. The default filename for the program's installer is SerialNull.exe. The program lies within System Utilities, more precisely Device Assistants.
From the developer:
SUDT SerialNull is an advanced configuration utility, which purpose is to emulate RS232 serial ports connected via virtual null-modem cable using Virtual Serial Ports Driver, with SerialNull you can create any number of pure virtual serial ports in your system connected into pairs via virtual null-modem cable without having real serial ports occupied.
You may want to check out more software, such as SUDT SerialRemap or SUDT SerialTrace, which might be related to SUDT SerialNull.