Table of Contents:

Definition and Overview

1. Introduction

2. Softswitch Architectural Overview

3. Network Element Failure Scenarios in the Network Office

4. High-Availability Techniques for the Network Office

5. Software Failure Analysis

6. Conclusions

Self-Test

Glossary

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CO
central office

CPU
central processing unit

IAD
integrated access device

IETF
Internet Engineering Task Force

ISDN
integrated services digital network

MGCP
media gateway control protocol

PSTN
public switched telephone network

SCTP
stream control transmission protocol

SIP
session initiation protocol

SS7
signaling system 7

TCP
transmission control protocol

WAN
wide-area network