The office I work in has a Comdial Impact 8024S LCD DXP Speakerphone. If I am on an outside line on a phone call many in the office noticed that this one person in particular will not be on an outside line and appear to be in his voicemail (vm) when he does not have any vm. My question is: does this phone have certain buttons in which it enables one station to listen to another station's call without the second being notified? If so, how is this done?