Are you looking for something similar to this 'Bridged Call Appearance '?

Hi Anirban. I'm not familiar enough yet...we are in discovery right now. An example, we have 6 phones at a truck terminal. The main line/number rings on 4 bridged appearances on EACH phone. They can place that call simply on hold, and tell dispatch to pick up on whichever one is on hold on another phone. So I would have station 4334 on my phone on 4 buttons, as would all other phones and anyone can place those on hold and pick it up simply by pressing the button. NO FEATURE CODE. ty

Example, all 6 phones would have their primary as this bridged number, and anyone can answer/put on hold/go just press that key and answer anywhere a the terminal. Thanks again.

We are in the same situation with the need for bridged-appearances. The one feature that is not available is the ability when selecting a line appearance to be able to present the caller ID of the bridged line selected.

Is this what you are looking for? https://support.ringcentral.com/article/Configuring-delegated-lines-RingCentral-account.html