asterisk users - Sep 2009 - IPKall using iax

Is it possible to receive a call via IPKall through IAX connectivity without
registration?
If so how to set it up.

I've run-into and old link;
http://forum.voxilla.com/ipkall-support-forum/ipkall-beta-testing-iax-connectivity-without-registration-26728.html

-- 
Joseph