CRN VoIP, Telecommunications, Collaboration Microsoft To Take On Cisco In Unified Communications: "The public message will be one of collaboration between Microsoft and partners such as Cisco, Avaya and other makers of PBXes. Behind the scenes, though, all of those companies will compete for many of the same customer dollars.
'Do the math. The market for collaboration software is $4 billion. The market for voice is $40 billion. If you were Microsoft, where would you go?' asked a Microsoft source who requested anonymity. "