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.