What we need is to know the STAR-KEY sequence to use to pick up a call that is RINGING to another phone (not a call that has already gone to VM or has been Parked, but one that is still ringing).
This is called "Call Pickup" when an extension is ringing and we want to pick it up BEFORE it goes to voicemail - Presence is NOT the same thing at all, nor is using "shared" lines a solution.
The Polycom phones we have are capable of this, and it's usually a very simple thing to do - but the actual star-key sequence is set by the PROVIDER, not the phone hardware. With our old VOIP provider it was *98, with other non-VOIP providers it's usually something like *55. Every telecom service provider has this feature.
I just need to know what the star-key sequence is for RingCentral. We don't want to change our routing, nor to buy new phones - we just need to occasionally be able to pick up a coworkers ringing phone if they've stepped away - we try to be sure all calls are answered whenever possible.