asterisk sip phone

to design a front end for asterisk for click to call,sms and call conferencing on a web page. We want a page were two text boxes will be created and users will be able to entered two phone numbers then click a button to call, they can also make the text box expand for call conferencing, the conferencing can be scheduled by selecting time on the webpage. Below those two texy boxes should be a larger text box for sms users can select wether to text up to 20 numbers. Calling card module will be on it two. IVR services for loading those cards too are required. We have set of PHP scripts to load unto the page. WE have an apache server with asterisk and myqsl already. Fast delivery at the lowest price is what we want. Billing will be done with A2Billing and payment through [login to view URL]