feat: add Telnyx SIP trunk provider example

[a692570]

Summary

This PR adds an example demonstrating how to configure LiveKit Agents to work with Telnyx as a SIP trunk provider for telephony integrations.

Changes

• Added directory with:
  • • Configuration guide for Telnyx SIP trunk integration
  • • Example agent for handling incoming calls via Telnyx
  • • Example for initiating outbound calls through Telnyx
  • • Environment variable configuration template
  • • Dependency notes

Technical Details

The example demonstrates:

1. Environment variable configuration for Telnyx SIP trunk (, )
2. Inbound call handling with Telnyx trunk
3. Outbound call initiation using LiveKit SIP API with Telnyx trunk
4. Integration with LiveKit Inference for STT, LLM, and TTS

Prerequisites

Users need:

1. LiveKit Cloud account with SIP trunk configured using Telnyx
2. Telnyx account with phone number and SIP connection
3. Configuration of environment variables (see README.md)

Testing

The examples follow the same patterns used in existing telephony examples (, ) and use standard LiveKit SIP APIs.

Checklist

• Code follows project style guidelines (ruff format)
• Documentation included for configuration
• Examples tested for syntax correctness

References

• LiveKit SIP Documentation: https://docs.livekit.io/realtime/sip/
• Telnyx SIP Trunking: https://telnyx.com/products/sip-trunking
• Existing telephony examples: ,

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[devin-ai-integration]

✅ Devin Review: No Issues Found

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