I have 2 facilities with Norstar MICS. I tried at both locations to initiate a conference call with 2 other people outside of phone system. I would assume that you make the first call, hit the conference feature, make the 2nd call, hit the conference button again and bridge all 3 phones together. What happens is that the first call is made, the conference feature button is pushed, the display reads "make second call" but it does not place first call on hold or give dial-tone for 2nd call. Is this a problem or is there a feature that needs to be activated in the system programming that we do not have turned on?