Sending EndFrame() in a LLM tool_call will not hangup the phone call

[zamia]

I want to hangup the phone in a LLM tool call, so in the tool context I called llm.push_frame(EndFrame()), but this could not hangup the call.

So is it possible to hangup the phone call in a LLM tool call context? In the twilio document it says the only way to hangup the call is close the websocket. I know the FastAPIWebsocketInputTransport will close websocket when it process EndFrame. But I cannot get the reference from a llm tool context. How should i do this?

Some other information:

• use Twilio bidirectional stream to connect call to LLM;
• use FastAPIWebsocketTransport

So any suggestions? Thanks!