Professional 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 offline talkback (without server for SIP)
