Can i make a call using x-lite on local LAN?

hi i have installed zaptel 1.2 libpri1.2 and asterisk 1.2 on linux fedora core 1 .
asterisk is running fiine and i have installled x-lite softphone on linux .

now i want to make a call in local network lan .
to another pc which has got only x-lite installed on it.there is no asterisk .
now by configuring both asterisk and x-lite on computer and by configuring only x-lite other computer which is a linux fedora core 1 kernel 2.4 v.
can i make a call ?

my ip is
other pc ip is
thanks in advance for the reply .