Table of Contents:

Definition and Overview

1. Introduction

2. The Limits of Traditional Line Testing Equipment

3. How Line Testing Meets Telcos' Business Objectives

4. What a Line Test System Must Do

5. Uniformity

6. Transmission, Noise, and ISDN Tests

7. Noise Levels and Modems

8. Inward Tests to Localize Faults

9. Test Accuracy

10. Test System Integration with Records Verification

11. Test Results Analysis and Data Management

12. Nonvoice Calls and the Future of Line Testing

Self-Test

Glossary

PDF of this tutorial

ALT
automatic loop test

ANI
automatic number identification

CLEC
competitive local exchange carrier

DC
direct current

DLC
digital loop carrier

DSL
digital subscriber line

I-Report
post-installation trouble report

ILEC
incumbent local exchange carrier

IP
Internet protocol

ISDN
integrated services digital network

LTS
line test system

MDF
main distribution frame

MTTR
mean time to repair

OSS
operations support systems

PCM
pulse code modulation

POTS
plain old telephone service

RTU
remote test unit

TCP
transmission control protocol

TOK
test okay