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SIP Opus CodecNew

Automatic link negotiation for high quality audio over IP transport

The cost-effective SIP Opus Codecs combine the ease of SIP-based link 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 exceptional quality and reliability in interactive speech and music transmission over the Internet. 

The devices build on the Opus codec’s quality, efficiency and low latency with SIP functionality to establish seamless links across SIP-compatible telephone or other IP-based communications systems. The Barix devices dial another device and accept an incoming call automatically to negotiate a transmission link for Opus-based audio streaming. The SIP Opus Codecs offer a reliable, high-quality solution for studio-to-studio (SSL) and studio-to-transmitter (STL) applications at cost-efficient pricing.

Supported Codecs

Use Case for Remote Contribution

  • Bi-directional mono Opus codec
  • Microphone / line level input
  • Audio level supervision with SNMP trap generation
  • Support of multiple coding standards
  • Line level output (balanced)
  • Amplified output 5W (8 Ohm)
  • Power over Ethernet (PoE)

Choose your device

Built on Barix’s latest-generation, high-performance IPAM 400 audio module, the SIP Opus Codec devices are available in two powerful models (more coming). The bi-directional mono MA400 SIP Opus Codec is powered by PoE and features analog microphone or line-level input and 5W 8-ohm or line-level output. Meanwhile, the stereo, externally powered M400 SIP Opus Codec can be configured as either an encoder or a decoder, and offers line-level analog input or output with RCA connections. The M400 also supports directly connected USB microphones. Both models support audio level supervision with SNMP trap generation and interoperate easily with third-party SIP-compliant, Opus-compatible products. The MX400 device with XLR connectors is in development.


  • Line level input (RCA)
  • Line level output (RCA)
  • RS232 for tunneling
  • 2x USB ports
  • External Power Supply


  • Bi-Directional
  • Microphone /line level input
  • 5 Watt 8Ohm or Line level output
  • RS232 for tunneling
  • Power over Ethernet 


  • Balanced XLR Input / Output

Coming Soon!

SIP Opus Codec Installation

Use Cases

The SIP Opus Codec is perfect for remote contribution, STL and SSL.

SIP based Studio to Transmitter link

Live audio codec for sports or event contribution

SIP based Studio to Studio Link

Contact us about the SIP Opus Codec

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Ordering Numbers

  • 2019.9260

    MA400 SIP Opus Codec (PoE)

  • 2019.9263

    M400 SIP Opus Enc/Dec EU Package

  • 2019.9264

    M400 SIP Opus Enc/Dec US Package

  • 2019.9265

    M400 SIP Opus Enc/Dec UK Package

  • 2019.9266

    M400 SIP Opus Enc/Dec NoPSU Package

Documents & Downloads


SIP OPUS Firmware 1.3.1