See this related article on How to Transfer Calls from Your RingCentral Desk Phone
If the recipient is busy, you can transfer the caller directly to the recipient’s voicemail.
- Press the icon. This will put the caller on hold.
- If your default transfer type is not set to blind, you’ll have to click the blind key before the next step.
- Enter *0 (asterisk and then zero) and then enter the extension, you would like to transfer the call to
- Wait a couple of seconds for the transfer to complete