Communications System Owner Manual
Table Of Contents
- Table of Contents
- ABOUT THIS DOCUMENT
- 1. INTRODUCTION TO CONNECTIVITY
- 2. COMMUNICATION SYSTEM NETWORKING (em AN OVERVIEW
- 3. TANDEM TIE TRUNK NETWORKS
- 4. MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES
- 5. ELECTRONIC TANDEM NETWORK (ETN) THROUGH THE ETN AND PNA PACKAGES
- 6. DISTRIBUTED COMMUNICATIONS SYSTEM (DCS)
- 7. DATA CONNECTIVITY - AN OVERVIEW
- 8. DATA COMMUNICATIONS CAPABILITIES
- 9. DATA COMMUNICATIONS CONFIGURATIONS
- A. RELATED DOCUMENTS
- B. SYNCHRONIZATION OF DIGITAL FACILITIES
- THE NEED FOR SYNCHRONIZATION
- SYNCHRONIZATION HIERARCHY
- CHANGES TO THE SCS SOFTWARE MADE AVAILABLE VIA SOFTWARE PATCHES
- NETWORK SYNCHRONIZATION AND ENGIINEERING
- AVAILABILITY OF SYNCHRONIZATION SOURCES
- CONCLUSIONS ON SYNCHRONIZATION
- USE OF GENERIC 2 AS A SYSTEM CLOCK REFERENCE
- USE OF GENERIC 1 AS A SYSTEM CLOCK REFERENCE
- C. TRUNKING TERMS AND CAPABILITIES
- D. COMMUNICATIONS PROTOCOLS
- E. LEAD DEFINITIONS
- F. NETWORKING FEATURES - AVAILABILITY MATRIX
- ABBREVIATIONS
- GLOSSARY
- INDEX

1-4 TRANSMISSION TYPES
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T
s
1
6
1
3
6
4
3. PCM
pulses
4. PCM
output
011 001 110 001 011 110 100
3
3.0
1.4
6.2
1.3
2.8
5.9
4.1
1. Original
signal
2. PAM
pulses
011001110001011110100
Adapted from: Data and Computer Communications, by William Stallings, Macmillan Publishing Co., N.Y., 1988
Figure 1-1. Analog-to-Digital Conversion