ASTPP is a leading open-source VoIP Billing and Telecom Management Platform built on FreeSWITCH, trusted by VoIP service providers, telecom operators, ITSPs, and enterprises worldwide. Designed to support wholesale, retail, calling card, SIP trunking, and carrier-grade communication services, ASTPP helps businesses automate billing, routing, customer management, and service provisioning from a single platform. With a comprehensive suite of telecom solutions, ASTPP offers VoIP Billing Software, Class 4 Softswitch, Class 5 Softswitch, Multi-Tenant IP PBX, Calling Card Platform, DID Management, SIP Trunking, Mobile SIP Dialer, PC Dialer, and more. Its powerful real-time billing, routing, and management capabilities enable service providers to increase operational efficiency, reduce revenue leakage, and create new revenue opportunities. Trusted by telecom businesses across the globe, ASTPP continues to drive innovation with scalable, carrier-grade solutions that simplify telecom operations and support business growth.