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Sunday, January 31, 2016



the colors of the light on the left top have different means,green means wait for calls, yellow lights when they change state to away,also lights when they reject the call,also when they accept the call before enter the class.  blue lights when they are in class.   if the light is not green for too long , teacher could change her state to away and then change back to online.  for example if teacher accept the call the light changes to yellow, but after 30 seconds, the student is not in class, she can change the state and change back.  other wise, they may be locked that can not received the calls for long time.

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