The cost-effective SIP Opus Codecs combine the simplicity of SIP-based connection establishment with the efficiency of the Opus audio compression format. The SIP Opus Codec devices encode or decode audio signals using the open standard Opus Codec, a royalty-free audio compression format known for its exceptional quality and reliability in interactive voice and music transmission over the Internet. The devices leverage the quality, efficiency, and low latency of the Opus Codec with SIP functionality to create seamless connections over SIP-compatible phones or other IP-based communication systems. Barix devices automatically accept incoming calls and connect to another device to negotiate a transmission link for Opus-based audio streaming. The SIP Opus Codecs provide a reliable, high-quality solution for studio-to-studio (SSL) and studio-to-transmitter (STL) applications at a cost-effective price. Included: Barix - SIP Opus Codec M400.