as you must have already seen the jtapi on sun.java.com is just a framework. you need to have an implementation of those interfaces.
i searched the net and i have come accross only one FREE implementation that is on the following site xtapi.sourceforge.net
also search google with the key words ” jtapi implementation ” I am sure this will help you. If you have anymore resources then do let me know via this forum or e mail me : firstname.lastname@example.org