Hi I am using v10 demo for test run, I setup 2 cisco SPA303 remote users and 4 extensions - 101 & 102 for operator(group ring set so lamp will flash on both users when someone calls in), 103 & 104 for extension of the remote users separately. On each cisco SPA, I set line 1 for user own extension, line 2 for 101 and line 3 for 102. I have no idea on how I can set as:- 1. 103 can notice from his phone if 104 is talking with somebody or vice versa 2. 103 can notice if 104 has picked up the incoming call or vice versa Sorry I am newbie on IPPBX, please advise if the setting is correct and help on busy lamp setup.