Transferring a call direct to voicemail is similar to a normal call transfer, but it sends the call straight to the user's voicemail box without ringing their extension. To do this, press the transfer button, then dial **, and finally dial the extension of the user you want to send the call to voicemail. This process allows you to redirect a call to a user's voicemail box quickly and efficiently. The transfer is completed by dialing the transfer code, **, and the desired extension.