The5ESSSwitching System: Introduction

Abstract

This special issue of the AT&T Technical Journal is devoted to the 52?&S™ switch. In this introductory paper the authors provide some historical background; outline the characteristics of this new, advanced system; and summarize its architecture, features, and status.

Predicting risk of software changes

“…As a test case we created such a model for a large software system, the 5ESS® switching system software. 1 We evaluated the predictive properties of our model and then transformed the model into a decision support tool. It is currently being used by the 5ESS project to evaluate the risk of changes that are part of software updates (SUs).…”