Loop back call using xlite softphone

I am planning on buying a Supura soon but was trying to get a loop back call working using a softphone in the mean time.
Can I test my asterisk using loop back calls without attaching any hardware or did I get it completely wrong.
My understand of the asterisk manual is, I can use xlite softphone without a Supura hardware.
If this can be done, how can I go about it?

Any help will be appreciated.
Thanks

It is possible
google.com/search?q=xlite+asterisk

Try to refer asteriskguru.org .They gave good information on how to configure softphones for asterisk.