VoIP: Where We’re Going, Where We’ve Been E-01 Rich Birckbichler VP Sales Versatel Networks

By 2007 85% of all cell phones sold will be dual mode. Where we are Going………………Universal Communications Local PSTN Class 5 Wi-Fi VoIP VoIM IP becomes Social Collaboration interface Customer can seamlessly moves calls between Wi-Fi / VoIM / VoIP / PSTN, and cellular networks Cellular network never takes control of the call Auto Leap..QoS triggered Leap Can be one number/ one voice mail By 2007 85% of all cell phones sold will be dual mode.

Where we are Going…Core/Satellite Options Configuration PBX/Keysystem IAD Out-of-Region Area - 1 Local PSTN Class 5 VoIP Termination Carriers PSTN Tandem Core Configuration Remote PSTN Class 5 Satellite Configuration PBX/Keysystem IAD Out-of-Region Area - 2 Regional traffic stays in region Avoids backhauling LD routed to maximize profitability Ability to maintain Access/Termination fees Backhauled cost reduced via IP Local Gateway Utilized for pure LD plays

Where we are now…IP VoIP and Transport Network Engineering is critical for VoIP to deliver expected QoS to subscriber