Charles Giancarlo, Cisco Systems Inc.’s chief development officer and heir-apparent to CEO John Chambers, resigned Thursday to join the investment firm Silver Lake Partners. With the capabilities of IP there’s a lot happening with telephony, software and IT. Silver Lake owns Avaya, IPC Communications and a number of other interesting tech companies. They really get the big picture of where things are going in the world of IT and Telephony conversion. Seems like Charles Giancarlo liked what he heard. Your thoughts!