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Inject custom SIP headers into Telnyx AI Assistants for richer call context

29, May 2025

Custom SIP header support: richer AI assistant context

You can now inject dynamic variables into AI Assistants using custom SIP headers, including support for User to User and Diversion headers as system variables. This opens up new ways to pass call context—improving automation, routing, and compliance across regulated and high-volume voice environments.

What’s new

  • Custom SIP headers as dynamic variables: Pass context-specific data directly to your AI Assistant by embedding custom SIP headers in your call flows.
  • User to User and Diversion headers: Use these standard SIP headers as out-of-the-box system variables for AI logic and workflow decisions.
  • Context-enriched automation: Enable AI Assistants to tailor conversations based on caller intent, account type, or workflow triggers, improving self-service and triage.
  • Flexible integration: Adapt to industry-specific needs—like passing claim numbers, appointment details, or compliance context—without additional middleware.
  • Seamless with existing infrastructure: Works with modern PBX, CCaaS, or contact center stacks supporting custom SIP header insertion.

Why it matters

Passing granular call context is essential for advanced automation in healthcare, insurance, banking, logistics, and enterprise contact centers. By leveraging SIP headers as dynamic variables, you can inform AI Assistants with the purpose, urgency, or compliance requirements of each call—reducing manual handoff, accelerating resolution, and supporting audit readiness. This is especially valuable for regulated sectors where call intent, member ID, or case status must be handled securely and efficiently.

How to get started

  1. Configure your PBX or carrier platform to insert custom SIP headers (including User to User or Diversion) in outbound calls to Telnyx.
  2. In the AI Assistant builder, map these SIP headers to dynamic variables via the Telnyx developer documentation.
  3. Reference these variables in your assistant’s logic to drive conversation flow, authentication, or compliance checks.
  4. Test call flows by placing calls with different SIP header values and reviewing assistant responses in the Mission Control portal.

Learn more about it on https://developers.telnyx.com.

Get started today to transform AI conversations into meaningful, ongoing relationships.