TAILIEUCHUNG - Accelerating the Deployment of VoIP and VoATM

Carriers are moving voice services to packet networks both to reduce upfront and operational costs and to provide more value-added services in an increasingly competitive environment. A recent study by a major carrier found that packet equipment was 70 percent less expensive than traditional voice equipment, and data access lines were 60 percent to 80 percent cheaper than voice lines. Maintenance of packet networks was 50 percent less expensive, while provisioning was 72 percent lower. | Accelerating the Deployment of VoIP and VoATM Overview The economic advantages of packet voice are driving both the access and core voice networks away from circuit switching towards packet. The industry continues to debate whether the future of these packet networks will be based on pure ATM pure Internet protocol IP IP over asynchronous transfer mode ATM IP over multiprotocol label switching MPLS or a combination thereof. There are advantages to both ATM and IP and reasons for choosing each. This tutorial will explore the role of next-generation switches which as they become widely adopted for both access and core networking must be able to handle voice traffic over both IP and ATM networks for future extensibility as the debate continues and must have the features necessary to interwork with existing public switched telephone network PSTN . Topics 1. Introduction 2. Voice over Packet Architecture 3. Why Voice over IP 4. Why Voice over ATM 5. Designer Considerations for Voice over Packet 6. Elements of a Next-Generation Switching Platform 7. Switching Platform Media Gateway 8. Signalling Gateway 9. The Softswitch Media Gateway Controller 10. Application Server AS and Services 11. Conclusion Self-Test Correct Answers Web ProForum Tutorials http Copyright The International Engineering Consortium 1 21 Glossary 1. Introduction Carriers are moving voice services to packet networks both to reduce upfront and operational costs and to provide more value-added services in an increasingly competitive environment. A recent study by a major carrier found that packet equipment was 70 percent less expensive than traditional voice equipment and data access lines were 60 percent to 80 percent cheaper than voice lines. Maintenance of packet networks was 50 percent less expensive while provisioning was 72 percent lower. However consolidation of voice from the PSTN onto packet networks has in the past proven difficult and therefore has happened very slowly. .

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