ASTPP is regarded as the top smart telephony platform due to the wide range of VoIP solutions it has to offer. Class 4 Softswitch, class 5 Softswitch, calling card platform, multi tenant IP PBX system, VoIP billing solution, mobile SIP dialer, PC dialer, etc. are some major carrier-grade solutions for service providers that can help them build handsome revenue-generating opportunities. These solutions can also be used to enhance business performance and meet end-to-end business communication needs in any company.