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Bandwidth SIP 606 Not Acceptable

The request is not acceptable due to media constraints.

Resolving SIP 606 Not Acceptable Error in Bandwidth Voice API

Understanding Bandwidth Voice API

Bandwidth is a leading provider of Voice/Calls Communication APIs, enabling developers to integrate voice calling capabilities into their applications. The API allows for seamless voice communication, offering features such as call control, media streaming, and more. For more information, visit the official Bandwidth Voice API page.

Identifying the SIP 606 Not Acceptable Symptom

When using the Bandwidth Voice API, you might encounter the SIP 606 Not Acceptable error. This error typically manifests when a call request fails due to media constraints, preventing the call from being established successfully.

Explaining the SIP 606 Not Acceptable Issue

The SIP 606 Not Acceptable error indicates that the media settings specified in the call request are not compatible with the recipient's capabilities. This can occur if the codecs or media formats requested are not supported by the receiving party.

Common Causes of SIP 606 Error

  • Incompatible media codecs between caller and receiver.
  • Unsupported media formats in the call request.
  • Network restrictions affecting media negotiation.

Steps to Fix the SIP 606 Not Acceptable Issue

To resolve the SIP 606 Not Acceptable error, follow these steps:

Step 1: Review Media Settings

Ensure that the media settings in your call request are compatible with the recipient's capabilities. Check the codecs and formats being used. You can find a list of supported codecs in the Bandwidth API documentation.

Step 2: Adjust Media Constraints

Modify the media constraints in your application to use widely supported codecs such as G.711 or Opus. This can be done by updating the SDP (Session Description Protocol) in your call setup.

Step 3: Test the Call

After adjusting the media settings, test the call again to ensure that the changes have resolved the issue. Use tools like Wireshark to analyze the SIP traffic and verify successful media negotiation.

Conclusion

By understanding and adjusting the media settings in your Bandwidth Voice API calls, you can effectively resolve the SIP 606 Not Acceptable error. For further assistance, consider reaching out to Bandwidth Support.

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