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Military

Field Manual
No. 24-27

FM 24-27                 
HEADQUARTERS           
DEPARTMENT OF THE ARMY 
Washington, DC, 27 February 1987

 

FM 24-27

TACTICAL AUTOMATIC CIRCUIT SWITCHING AN/TTC-39

Table of Contents


Preface

Chapter 1 - AN/TTC-39 Circuit Switch

1-1. Mission and Functions

1-2. Communications-Electronics Management System

1-3. Information Flow

Chapter 2 - Equipment Description

2-1. AN/TTC-39( )(V)

2-2. Overview

2-3. Hardware

2-4. Communications Security Group

2-5. Software

2-6. AN/TTC-39A

Chapter 3 - Planning Factors

Section I - Features

3-1. Loop and Trunk Capacities

3-2. Digital Operating Rates

3-3. Traffic Handling Capacity

3-4. Secure and Nonsecure Operation

3-5. Timing of Switches

3-6. Numbering Plan Format

3-7. Services and Classmarks

3-8. Essential User Bypass

3-9. Signaling and Supervision

3-10. Magnetic Tape

3-11. Satellite Connectivity

3-12. Operator/Machine Interface

3-13. AN/TTC-39A Capabilities and Functions

Section II - Control and Diagnostics

3-14. Switch Control

3-15. Diagnostics

Section III - Interface

3-16. Connections to Subscribers

3-17. Trunk and Telephone Interface Equipment

3-18. Switch, Trunk, and Telephone Line Interface Table

3-19. Communications Security

Section IV - Operational Considerations

3-20. Operations Under Emergency Conditions

3-21. Operation Under Extreme Conditions

3-22. Reliability and Maintainability

3-23. Survivability and Vulnerability

3-24. Physical Security

3-25. Siting

Chapter 4 - Application

4-1. Operations of the Switch

4-2. Traffic Switching and Processing

4-3. Initialization Process

4-4. Numbering Plan

4-5. Technical Management

4-6. Data Entry

4-7. Routing

4-8. AN/TTC-39A Application

Chapter 5 - Employment

5-1. Use of the Switch in a Communications System

5-2. General Concept of Operations

5-3. Nodal Composition

5-4. Traffic Engineering

5-5. Coordination and Information Flow

5-6. System Planning and Network Development

5-7. Displacement

5-8. Reconfiguration and Restoral

5-9. Interoperability

Appendix A - Tables

Appendix B - Planning Example

Appendix C - Reproducible Forms

Glossary

References

Blank Forms

Authorization Letter


DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited.



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