1 Scaling Advanced Real-Time Communications Bob Alice User Campus / Enterprise UserWANs/MANs/LANs Campus / Enterprise Host Network-Layer Connectivity high-performance, end-to-end IP transit High-performance, end-to-end IP connectivity is necessary, but not sufficient to connect Alice with Bob ?!!?

2 Bob Alice Bob Today: 3 rd Party ASPs Provide the Missing Middleware User Campus / Enterprise UserWANs/MANs/LANs Campus / Enterprise Host Network-Layer Connectivity Applications 3 rd Party ASPs Skype high-performance, end-to-end IP transit FWDYahoo!… ? Communications is Balkanized by competing 3 rd parties, who are unable to provide strong authentication, identity management, or rich presence for their users ? Bob Jones Skype: bob2_bigu.edu FWD: Yahoo!: bobj26 BU

3 Alice Bob Alice User Campus / Enterprise UserWANs/MANs/LANs Campus / Enterprise Host Network-Layer Connectivity Applications Campus Middleware high-performance, end-to-end IP transit Identity management, authentication, call routing, and rich presence are best implemented and scaled by campus / enterprise middleware Connective Middleware Bob Jones BU Moderating Middleware Presence Campus / Enterprise Middleware

4 Market Maker Role Bob Alice User Campus / Enterprise UserWANs/MANs/LANs Campus / Enterprise Host Network-Layer Connectivity Applications Identity Management, Call Routing, Authentication, Presence...or... Auxiliary Services Bridging, Gatewaying, Messaging, … Identity Management, Call Routing, Authentication, Presence Campus Middleware Bridging, Gatewaying, Messaging, … Bridging, Gatewaying, Messaging, … high-performance, end-to-end IP transit Open campus / enterprise SIP communications creates a communications commons, creating vast new markets ASPs Hard / Soft Client Vendors Proxies, Directories, Feature Servers…