Do you use IM? A cell phone? E-mail? How about VOIP? Video conferencing? Desktop sharing?? OK those last few may be outside your normal day-to-day activities... but for Rakesh, the "UC" Guy, it's the norm.
He's a Senior Test Manager on our Unified Communications team where he works to bring all of the ways you are contacted or communicate together. You will see how he uses IM on his cell phone, receives a phone call on his phone, laptop, cell phone, and desktop computer simultaneously, and best of all... shares a video conferencing/code-debugging session with some of his teammates who are working remotely.
As a bonus, Rakesh describes some of the protocols and services required to run such a sophisticated system. So if you're interested in UC and what it's like at Microsoft, this one's for you.