networkworld.com — By Jim Duffy, Network World February 23, 2012 08:28 AM ET Cisco's appeal of the European Commission's approval of the $8.5 billion Microsoft/Skype union is customer driven, Cisco CEO John Chambers said this week. Addressing a small group of reporters via TelePresence at Cisco facilities around North America, Chambers said customer desire for interoperability forced Cisco to appeal the EC ruling.