How to Transfer SIP Calls to Another Number in voice-pipeline-agent-python？

[ericyue]

Hello,

I am currently working on a simple demo using voice-pipeline-agent-python and have successfully configured the SIP settings as required.
However, I am looking to implement a feature where, after a user dials a number and enters the logic of the VoicePipelineAgent, they can trigger a signal that redirects the call to another number for manual response.

Here's what I have so far, and I'm wondering how I can proceed to achieve the call transfer functionality:

The user dials a number and is connected to the VoicePipelineAgent.

At some point during the interaction, the user triggers a specific signal.
Upon receiving this signal, I want the call to be transferred to another predefined number for human manual handling.

I have reviewed the documentation, but I'm not sure how to implement this feature within the voice-pipeline-agent-python framework. Could someone please guide me on the steps or provide an example of how to achieve this?

Thank you in advance for your help!