*Professional IP/SIP audio encoder and decoder to transmit audio signal to all devices in the network
*Adopt high-speed industrial grade chip, startup in less than 1s
*Support most of the SIP telephone system like Cisco or Avaya
*With line out and mic in for audio intercom
*With built-in microphone for Intercom, will be disable automatically with external mic plug-in
*With 1 relay input and 1 relay output
*With audio input for external audio source to target terminals
*Support offlfline talkback (without server for SIP)