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...