This is a transfer where the user waits for the transfer destination to answer and potentially talks to that party before completing the transfer. However the initial consultation stage is presented as an internal call with internal call details and ringing.
This is a transfer completed whilst the destination is still ringing.
Automatic Transfer - Forwarding
The IP Office allows users to automatically transfer calls using forwarding options such as Forward on Busy, Forward on No Answer and Forward Unconditional. For full details see DND, Follow Me and Forwarding.