Transferring calls from your phone:


https://support.ringcentral.com/article/Transfer-Call-Voicemail-using-Polycom-VVX-Device.html


Setting default transfer method from your phone:


https://support.ringcentral.com/article/Deskphones-Polycom-Phones-Change-Default-Transfer-Type.html


Voicemail notifications to email:


https://support.ringcentral.com/article/9740.html


Turn off Parked Call Notifications:


https://support.ringcentral.com/article/Polycom-VVX-Phones-Ringing-Incorrectly-for-Parked-Calls-and-Presence-Notifications.html