Standard |
TEL 112 - Digital
Telephony
Introduces students to the T1 digital carrier system and the signal itself. A technical description of T1 system is provided, and T1 services are compared to more common services. Topics include: introduction to digital telephony, T1 signal synchronization, technical aspects of T1, installation of customer premises equipment, T1 transmission services analysis, and related T1 services and enhancements.
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Competency Areas: |
Hours
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Introduction to Digital Telephony |
Class |
4 |
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T1 Signal Synchronization |
D. Lab |
0 |
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Technical Aspects of T1 |
P. Lab/O.B.I. |
6 |
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Installation of Customer Premises Equipment |
Credit |
6 |
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T1 Transmission Services Analysis |
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Related T1 Services and Enhancements |
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Prerequisite: TEL 111 |
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Corequisite: |
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Course Guide |
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Competency |
After completing this
section, the student will: |
Hours |
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Class |
D. Lab |
P. Lab/ O.B.I. |
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INTRODUCTION TO DIGITAL TELEPHONY |
2 |
0 |
0 |
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Historical overview of T1 technologies |
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T-carrier hierarchy |
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T1 terminology |
Define key terms associated with T1. |
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T1 capabilities |
Compare and contrast T1 capabilities with the existing technology. |
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T1 SIGNAL SYNCHRONIZATION |
4 |
0 |
0 |
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T1 signal synchronization |
Identify the levels of signal synchronization and describe the function
of each. |
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T1 framing formats |
Describe the three generations of AT&T T1 framing formats. |
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T1 channeling |
Describe major channeling format use in dividing the 1.536 Mbps into
channels. |
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Alarms, loopbacks, and keep-alive signals |
Define alarms, loopbacks, and keep-alive signals. |
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TECHNICAL ASPECTS OF T1 |
8 |
0 |
15 |
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Background |
Identify the major methods of digitizing voice. |
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Select the appropriate T-carrier facility for a given situation. |
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T1 electrical and physical characteristics |
Delineate the electrical and physical characteristics of T1. |
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INSTALLATION OF
CUSTOMER PREMISES EQUIPMENT |
14 |
0 |
45 |
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T1 spans |
Install and test T1 spans. |
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T1 channel service units |
Install channel service units. |
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Troubleshoot channel service units. |
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T1 multiplexers |
Install channel bank equipment. |
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Install and test multiplexer equipment. |
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Digital PBXs |
Install and troubleshoot digital PBXs. |
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Digital access and cross connect system (DACS) |
Summarize the applications of a digital access and cross connect
system. |
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Test equipment |
Perform loop-back and network testing. |
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Perform bit error rate and other impairment tests on all circuits. |
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End to end T1 configuration |
Ensure timing synchronization is accomplished on T1 installations. |
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T1 TRANSMISSION SERVICES ANALYSIS |
6 |
0 |
0 |
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T1 services |
Perform a tradeoff analysis between T1 and common voice grade or DDS
services. |
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T1 service performance parameters |
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Describe
AT&T's pricing structure for private line services. |
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RELATED T1 SERVICES AND ENHANCEMENTS |
6 |
0 |
0 |
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Introduction to T1 related services |
Describe common carrier services and enhancements that augment or can
be used in conjunction with T1 facilities. |
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Customer controlled reconfiguration (CCR) |
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Describe ISDN operation. |
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Suggested Resources |
Books:
Bellamy, J. C. (1982).
Digital telephony. New York: Telecom Library.
Cannon, D. L. (1983).
Understanding digital
troubleshooting. Dallas: Texas
Instruments.
Fike, J. L., &
Friend, G. E. (1984). Understanding
telephone electronics (2nd ed.). Indianapolis: H. W. Sams.
Flanagan, W. (1986).
The teleconnect guide to T-1
networking. (City, State): Author.