I am an avid asterisk programmer for many years. I have build many asterisk pbx phone systems for personal, and business use systems. I can meet your needs to teach you installation, dialplans, setting up extensions using SIP or IAX protocol and using a2billing alongside with asterisk to bill customers and create your own telephone provider or calling card provider. You will be able to create your own plans to offer to customers such as unlimited or minute based plans. You will have a complete understanding how asterisk works and how to use asterisk with mysql database for advanced dialplan logic and routing. I have created my own company called zoik networks in which we offer full end Voip services to users online, we offer calling card services, DID's, and termination/origination. I also have created customized applications within asterisk such as spoof call in which you can change your caller ID to anything you want before you dial out. I will work with you closely in developing great asterisk telephony skills to accomplish your needs and goals.