ASTPP is renowned as the #1 open source VoIP Billing Solution based on FreeSWITCH. It is developed to meet the needs of wholesale, retail, and other VoIP service providers. For several years, it has been bringing transformational changes in the VoIP industry with its innovative features and exceptional performance.ASTPP makes it possible to embark on an entrepreneurial journey without stressing about capital investment as it is available for free. It is one of the best carrier grade solutions for service providers.