iSoftSwitch is Linux based VoIP SoftSwitch with its web-based architecture & professional billing tools.

iSoftSwitch is a carrier-grade softswitch with integrated billing and unmatched routing flexibility for effective VoIP traffic management. Based entirely on the SIP standards platform, iSoftSwitch provides real time communication over IP networks. Once installed on a server, iSoftSwitch functions as a VoIP softswitch by connecting calls from one phone line to another within the same or different networks. At the same time, it provides advanced real-time monitoring, prepaid and post-paid billing, automatic invoice scheduling, and call-plan subscription.