Title Page

About This Document

Contents

Overview

Fault Handling Process

Basic Concepts and Methods of Fault Locating

Rectifying Service Interruption

Rectifying Transient Interruption

Rectifying Optical Power Abnormity

Rectifying Bit Errors

Rectifying a Fault in Pointer Justification

Rectifying NE Offline Problems

Rectifying Board Offline Problems

Rectifying Automatic Switching Failure

Rectifying Automatic Reverting Failure

Rectifying Optical Power Management Problems

Rectifying Ethernet Problems

Rectifying ECC Problems

Rectifying Clock Problems

Rectifying Orderwire Problems

Rectifying Interconnection Faults

Remote Maintenance Guide

Glossary