http://www.cs.vu.nl/~koole/ccmath/book.pdf
See this piece for more information about what we're saying. If you have a look at page 25 you can see the difference between a bigger and smaller call center if you have occupancy on the x-axis and servicelevel on the y-axis.
The same sort of curves are created when plotting asa and occupancy, however the curves are flipped upsidedown and are not limited (ie asa can increase till infinity).
The graphs you were trying to show me don't seem to work, only the fourth works.
I'm going to try and post some graphs in another website. I 'll send the link if this works