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# Voice: transfer a call to a Twilio application

The Transfer Call block has a new **Twilio application** destination. Your AI Agent can send a caller to a TwiML Application that you own, for example a payment IVR or a Twilio Studio flow. The Agent stays on the call, and the application sees the caller's phone number. Key/value rows in the block reach the application as parameters.

When the application hangs up, it can decide what happens next. For a call from Aircall, the application can end the call, ring an Aircall line, team or user, or let the Smartflow continue. For a call from your own Twilio flow, the call goes back to that flow with the values that the application returned. A call made directly to the Agent ends.

See [Transfer a call to a Twilio application](/docs/channels/voice/contact-center-integration).