Asterisk Management System with PHP

Hello, We are looking for someone to help us start the development of an Asterisk Management System. The control panel must be developed in PHP. I am not the best with Asterisk and I am unsure how the control panel would communicate with Asterisk. This is what we need the control to do: - Add a SIP Trunk Channel (For PSTN connectivity) - Remove a SIP Trunk Channel - Add Telephone Numbers to the database which can be used by extensions for outbound and inbound calls - Remove telephone numbers - Create a telephone extension - Delete a telephone extension - Create a multi-level IVR -- By multi-level, I mean the IVR will play a sound, expect key press, then it can play another sound, and expect another key press. The control panel should have all data stored in a MySQL Database, I do not know if Asterisk can read that database(?) but if it can then this is how it should be done. Very important! We need step by step instructions to be able to install asterisk and all modules along with a copy of all the PHP files so that we can install your work again on another server. The instructions should explain exactly what we need to do to get the control panel working on a new server. Any development must be opensource. Thanks, Ben