Welcome to the Jazz Community Forum
RTC 3.0.1 und WAS

Accepted answer

As Ralph said, we don't support this configuration.
For what it's worth, we did some exploratory testing with this configuration over a year ago, but ran into some issues which couldn't be easily resolved.
Sean.
2 other answers

Have you looked at this?
Comments

I know this article, the question should be, has anybody experience running RTC-Server on system-i without WAS.

Andreas, given that article and looking at http://www-03.ibm.com/systems/i/software/ias/ and http://www-03.ibm.com/systems/i/software/ias/faq.html it seems that the Integrated Web App server is very limited compared to WAS, so my first thought would be no. I passed your question to someone who might be able to answer.