1. Service Provider Network Customer Site Customer Site First Offering... WAN... PSTN LAN Enterprise Gateway Enterprise Gateway vmail gen d OSS ConfIM Network Gateway

2. Router Cisco 3640 3660 2600 IOS12.1(5) XM Customer Premises WAN; WorldCom Data Networks PBX PSTN Phone PBX Enterprise Gateway PVC Managed Services Router PVC or T1 or T1 IP Phone WorldCom Switchnet Network Gateway IP Phone PSTN Phone VBNS PSTN Phone Router SIP Server R/S Server Dialing Plans DAP L A N vmail gen d OSS ConfIM WorldCom Voice over IP

3. Features at Launch Single access pipe –Data applications –Internet –Inbound and Outbound Voice –Local, National and International –Mobile –Emergency Calling –Freephone (not GIS) –Directory Enquiries –Number Portability Private Dial Plans Forced on-net routing Network Based Voicemail