On most of the traditional PBX's I've messed with there is a Hands free/Privacy/Tone option on the phone. When you turn hands free or privacy on, that is only for extension to extension calls. Outside calls coming in will still ring the phone regularly. I am trying to figure out how to mimic this behavior with the Cisco SPA and Yealinks. I see an auto-answer option in the Yealink, but when that is enabled it auto-answers all calls, internal and external. Is there any way of doing this?