### Answer The long transfer wait times you're experiencing are likely due to the Ring Duration setting in your agent configuration. This setting controls how long the destination phone rings before the transfer times out. [(1) ]() [(2) ]() To fix this: Check your agent's Ring Duration setting and adjust it to a more appropriate value (30-50 seconds recommended) . [(2) ]() If it's set too low (like 10-12 seconds) , the transfer may fail or timeout before the dispatcher can answer, causing delays. Additional factors that can affect transfer speed: - **Transfer Type**: Warm transfers take longer than cold transfers because the AI agent first connects to the destination, performs human detection, and potentially delivers whisper messages before bridging the caller. [(3) ]() [(1) ]() - **Human Detection Timeout**: For warm transfers, the agent detection timeout (default 30 seconds) determines how long the AI waits to verify a human answered. [(3) ]() If this is set too high, callers wait longer. - **Telephony Provider Configuration**: If you're using custom telephony (SIP trunking) , ensure your provider settings are optimized. [(4) ]() Some community users reported transfer issues were resolved by adjusting their Twilio SIP trunk permissions. [(5) ]() Recommended settings for faster transfers: - Set Ring Duration to 30-50 seconds [(

1) ]() [(2) ]() - Consider using cold transfer instead of warm transfer if the whisper message isn't essential [(3) ]() [(1) ]() - If using warm transfer, adjust the agent detection timeout to balance speed with accuracy [(3) ]() If you've already checked these settings and the issue persists, the problem may be related to your telephony provider's configuration rather than Retell itself. [(5) ]()

​ To learn more, see the sources I considered: [[1] Call Transfer Node](https://docs.retellai.com/build/conversation-flow/call-transfer-node) [[2] Warm call transfer issue.](https://discord.com/channels/1186424376300679209/1468937717097431215) [[3] Transfer call](https://docs.retellai.com/build/single-multi-prompt/transfer-call) [[4] Custom Telephony Overview](https://docs.retellai.com/deploy/custom-telephony) [[5] Warm transfer](https://discord.com/channels/1186424376300679209/1436106645632450671) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

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