** janus audio bridge plugin
This plugin mix the audio streams. This is Multipoint Control Unit (MCU) with audio mixing functionality. This plugin sdp default disable video. Peers can then mute/unmute themselves by using sending message through plugin.
** video room plugin
This is videoconferencing Selective Forwarding Unit (SFU) for Janus. This is only publisher we should disable the audio publish. it handle by the audio bridge.
** text room plugin
This plugin use for text conversations for participants