### Answer
I don't have specific documentation about a live call barge-in or listen-in feature for human agents monitoring AI agent calls in real-time.
What the sources do mention is
warm transfer functionality, which allows the AI to hand off a call to a human agent with context preserved. [(1) ](
) [(2) ](
)
For your specific use case (live monitoring/barging into calls) , I'd recommend:
Check out these potentially useful sources:
- [AI Phone Agent](
)
- [AI Phone Agents for Contact Centers | Retell AI](
)
- [Human Agents vs. AI Agents: ROI Comparison | Retell AI](
)
Would you like me to provide a general answer based on my knowledge, or would you prefer to reach out to Retell AI directly for this specific feature inquiry? You can [Contact Sales](
) for detailed product capabilities.