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Azure open ai Realtime SIP connection details

reid kleman 0 Reputation points
2025-09-11T15:10:15.1733333+00:00

Hello, I was reading this article https://learn.microsoft.com/en-us/azure/ai-foundry/openai/whats-new?utm_source=chatgpt.com and saw realtime now SIP entry supported: public SIP URI, SIPS/SRTP, PSTN, HD Voice… I couldn’t find any documentation on this though. How can I find the public SIP URI we should target to connect phone calls to this resource?

Azure OpenAI in Foundry Models

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  1. Gowtham CP 7,955 Reputation points Volunteer Moderator
    2025-09-12T04:36:05.56+00:00

    Hello reid kleman ,

    Thank you for reaching out on the Microsoft Q&A.

    At this time, Azure OpenAI does not provide a documented public SIP URI for Realtime deployments. The “SIP entry supported” note you saw in the What’s new page confirms the capability is on the roadmap, but Microsoft has not yet published guidance on how to obtain a SIP URI for an Azure resource. Current documentation only covers WebRTC and WebSocket entry points. Microsoft Learn

    If you need SIP today, you have two options:

    Use the OpenAI Realtime SIP Connector, which gives you a public SIP URI in the OpenAI console. OpenAI Platform

    Or, if you want to stay fully on Azure, bring calls in via Azure Communication Services (ACS) (Direct Routing, PSTN, or numbers), and then forward the audio to Azure OpenAI Realtime over WebRTC or WebSocket. Azure Communication Services

    In other words, today the supported Azure path is PSTN/SIP → ACS → Realtime (WebRTC/WS), not SIP directly into an Azure OpenAI resource. If Microsoft exposes direct SIP entry, it will appear in the Realtime guides or Azure AI Foundry portal.

    I hope this helps!

    If the information is useful, please accept the answer and upvote it to assist other community members.

    1 person found this answer helpful.

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