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
4. MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP
OR MULTIPREMISES PACKAGES
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Main-satellite/tributary (MS/T) networks are arrangements of switches in which one switch is designated as
the main, while subtending switches are satellites or tributaries. The main switch is fully functional; each
satellite uses the trunks and attendants at the main switch. Tributary switches differ from satellite switches
in that they have their own listed directory number (LDN) and may have their own attendant and public
network facilities. MS/T users reach other users by dialing their extension numbers. and public network
facilities.
MAIN
SATELLITE
ATTENDANT
LINES
LINES
TRUNKS
Figure 4-1. Standalone MS/T Network
MS/T configurations are appropriate when:
• A single location cannot be served by a single switch due to traffic throughput considerations.
• It is advantageous for users on different switches to use the same RNX and be able to reach each other
by dialing only extension numbers.
• It is more economical to centralize trunks and attendants than to disperse than across all switches.
• The switch site suggests that multiple switches be used because of either the organizational structure of
the company, or the physical layout of the premises. (For example, the site may consist of several large
buildings with limited cabling facilities between them.)
Note that main switches can function as the focal point of a MS/T complex of switches, as well as serve as
the access point to tandem switches in electronic tandem network arrangements.
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