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Fax Technology and Testing Issues

Table of Contents:
Definition and Overview
1. Introduction
2. Why Fax Testing Is Necessary
3. Fax Operation Overview
4. Basic Fax System Structure and Process
5. Message Repetitions and Time-Outs
6. Fax System Test Issues
7. Network Test Issues
8. Common Deviations from ITU Standards
9. Fax Testing Customer Types
10. Fax Testing Application Areas
11. Conclusion
Self-Test
Glossary
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Self-Test
1. Fax transmissions account for between ___________ percent of the typical corporate phone bill.
a. 10–20
b. 20–30
c. 30–40
d. 40–50
2. The transport and quality expectations of fax in IP networks are similar to those of voice.
a. true
b. false
3. An image to be transmitted is first scanned to create a bit map composed of ______________.
a. black and white dots
b. ones and zeros
4. The correct order of fax call phases is which of the following?
a. call setup, pre-image handshake, line testing sequence, image transmission
b. call setup, line testing sequence, pre-image handshake, image transmission
c. line testing sequence, call setup, pre-image handshake, image transmission
d. pre-image handshake, line testing sequence, call setup, image transmission
5. Command messages are sent up to ___________ times or until acknowledged.
a. two
b. three
c. four
d. five
6. Fax standards compliance does not vary from manufacturer to manufacturer.
a. true
b. false
7. Which of the following standards defines procedures and message sequences used for fax communications?
a. T.6
b. T.30
c. T.37
d. T.38
8. Most fax systems deviate from ITU standards.
a. true
b. false
9. The ITU standard specifies a silent period of 75 ± 20 ms between signals using different modulation modes.
a. true
b. false
10. Fax testing is really only a necessity in engineering labs where fax products are created.
a. true
b. false
Glossary >>

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