The monitor uses fluorescent lamps with improved phosphors, and its color gamut is far larger than sRGB in greens and somewhat larger in reds.
The gamma curves are higher than the theoretical one at the default settings, producing a low-contrast, faded image. It means that the gamma value is set too low.
If you select “+0.6” in the monitor’s gamma settings, the curves improve, but not completely so. They are still above the theoretical curve in the left part of the diagram.
The curves are even higher at the reduced contrast than at the default settings.
Again, you can improve the curves somewhat by choosing “+0.6” in the monitor’s gamma settings. So, the gamma compensation setup is rather sloppy in the 245T, but you can easily make it acceptable using the monitor’s own settings, without additional calibration.