Sangoma B500 boards are designed for easy integration with open source projects, including Asterisk and FreeSWITCH, as well as other open source and IP PBX, Switch, IVR, and VoIP Gateway applications. B500 boards provide developers with new efficient solutions and cost effective connectivity.
Provide wholesale international callback service in China for voip service providers and call shops. We offer competitive price and billing system to our wholeseller. We are using SS7 PSTN line and no connection fee to customers.