A group of users can be created with a purpose of receiving voice announcements through the speaker of a telephone set, but it has to be in the waiting mode.
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.