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Nonvoice Calls and Line Testing
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
Self-Test
1. For years, line testing was used primarily to isolate DC faults and to restore service.
a. true
b. false
2. Traditional test equipment is equipped to provide the information needed to prequalify lines for increasingly popular digitized services such as ISDN and xDSL.
a. true
b. false
3. A test system need not be able to provide patterned test results to spot cables that have DC faults, water faults, load coil, or noise problems.
a. true
b. false
4. The only way to get uniformity is to use the same type of test head throughout a network.
a. true
b. false
5. The four types of line-test delivery are copper bypass pairs, digitized bypass pairs, switch-based (built-in) test equipment, and stand-alone line-test systems.
a. true
b. false
6. Load coils are used in approximately __ percent of the outside plant pairs in North America.
a. 10
b. 20
c. 75
d. 80
7. _____ is the most common type of problem reported.
a. noise
b. loss of service
c. loss of features
d. none of the above
8. The most important benefit of an inward test is _________.
a. fault detection
b. fault eradication
c. fault localization
d. fault concentration
9. The accuracy of the test head depends on ______________.
a. the ability of the test head to calibrate itself automatically
b. the number of bits used in the analog-to-digital conversion
c. the measurement algorithms used (three-terminal test technique
d. rejection of unwanted noise (power-line influence)
e. all of the above
10. Cross-functional data use can improve work flow and lower business costs in a number of crucial areas, including _______________.
a. security
b. engineering
c. building maintenance
d. corporate administration
e. all of the above
Glossary >>
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