Table of Contents:

Definition and Overview

1. Introduction

2. Voice over Packet Architecture

3. Why Voice over IP?

4. Why Voice over ATM?

5. Design Considerations for Voice over Packet

6. Elements of a Next-Generation Switching Platform

7. Switching Platform/Media Gateway

8. Signaling Gateway

9. The Softswitch/Media Gateway Controller

10. Application Server (AS) and Services

11. Conclusion

Self-Test

Glossary

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ACELP - adaptive code excited linear prediction

AIN - advanced intelligent network

AS - application server

ATM - asynchronous transfer mode

BHCA - busy hour call attempts

CBR - constant bit rate

CDV - cell delay variation

CES - circuit emulation services

IN - intelligent network

IP - Internet protocol

ITU - International Telecommunications Union

LNP - local number portability

MGCP - media gateway control protocol

MPLS - multiprotocol label switching

NEBS - network equipment building standards

PIC - primary interexchange carrier

PSTN - public switched telephone network

QoS - quality of service

RBOC - regional Bell operating companies

RSVP - resource reservation protocol

SAR - segmentation and reassembling

SCE - service creation environments

SCP - service control points

SCTP - stream control transmission protocol

SS7 - signaling system 7

TCAP - transactional capabilities application part

TDM - time division multiplexing

VCC - virtual circuit channel

VoDSL - voice over digital subscriber line

VoP - voice-over-packet