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A call session

• Video/Audio call going on
• Whenever a location is encountered in the conversation, Arjun is prompted by the system -- "Location detected -- Stata Center" with a button, "Take Me There"
• Clicking on that button opens a direct manipulation interactive Stata Center map. 
• The interactive, direct manipulation interface helps Arjun explore Stata Center by navigating through the 3D map, varying altitude and changing camera angels.

This interface is inspired from Skype Interface Left sidebar (3 main links) Contacts (to see all the contacts)

• Recent (it shows recent 10 contacts -- efficiency)
• History (History of all the chats/calls)
• Top bar (search for any location)
  The Main Pane It is the main window for the active tab (in this case -- Contacts Tab)
  
• For each contact shows the status (online/offline/away)
• you can make a call
see a log of all previous callsThe interface (see the home page) uses the user mental model of chatting, calling and video calling
Most popular tool used by people for international calling is Skype -- this user interface is consistent with Skype interface