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VOIP features

Internet and LAN linking of SDR radios via UDP datagrams

  • UDP audio streaming for both transmit and receive
  • UDP audio can be transmitted and received either using FM modulation (SVXLink) or other modulation types supported by QRadioLink
  • Interoperability with SVXlink via UDP audio. This enable QRadioLink to act as a SVXLink node.

Radio over IP using the Mumble protocol

  • Multicast radio to VOIP bridge (Radio-over-IP) connection between two or more endpoints operating in simplex or semi-duplex mode. The VOIP bridge uses a star topology with a central application (umurmur) acting as voice packet router and providing logical channel separation.
  • Compatible with the Mumble client application at the protocol level. Audio from Mumble clients can be transmitted over the RF channel unmodified
  • Configurable VOIP bitrate
  • Direct VOIP talk-around (only requires connection to a VOIP server and no radio)
  • Radio forwarding over VOIP - forward analog or digital radio voice to VOIP connection and viceversa
  • Wideband audio streaming over the Internet using the Opus audio codec
  • Radio node linking via VOIP and Mumble protocol - a group of radio nodes can be linked by sharing the same logical Mumble channel. Advantages of using the Mumble VOIP protocol include: multicast full-duplex voice transmission, no call setup overhead after initial network connection, simplicity of implementation, user defined logical channels, free software and open standard. This feature is still undergoing development.