Sending caller directly to extension voicemail

Simple question with probably a simple answer, but I can’t figure it out.

How can I send a caller to an extension’s voicemail bypassing any ringing?

Thanks

I assume that you do not want to pick up any calls from this phone number. Then you only need to setup an inbound route for that phone number (DID) to just send the incoming calls to the voice mail box.
If you