Checkout these step by step instructions
http://www.voipuser.org/forum_topic_9971.htmlhttp://www.asteriskextras.com/index.php?option=com_content&task=view&id=12&Itemid=2another step by step
http://www.voipjots.com/2006/02/click-to-call-with-your-asteriskhome.htmlhttp://www.webmaster-talk.com/php-forum/156207-click-to-call-using-php.html---------------- Here the simple steps ------------------
cd /var/www/html
wget vocalroute.com/webcall/web
call.tar.g
z
tar xzvf webcall.tar.gz
then redirect your browser to "
http://Asterisk-ip/click-to-call. php", by default code call an extension "9999", you can simply modify this accourding to your needs.