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[[http://www.google.com/+/learnmore/hangouts/|Google Hangouts]]. Visit: https://plus.google.com/hangouts/_/dd32b7d1e96c8f7615e3859786d37bb9f64fc169?authuser=0&hl=en
 
this card at call time for url.
 
Please do a trial run before the call if you have never used Google Hangouts.