We just switched to RingCentral and are trying to utilize the intercom system with the Yealink T48s and Expansion docks. We have gotten the intercom to work by pressing Intercom on the Yealink T48 then entering the Extension Number we wish to use. However when we add someone to the expansion hotkey and setting it up with Intercom to a specific user it just rings the user.

How do we get this to work on the Yealink T48s with Expansions?