Preface
About This Guide
This user's guide provides the information needed to install and operate your Model 3550 or 3551 data service unit (DSU), which may or may not be equipped with a dial backup module (DBM) or time division multiplexer (TDM). If your DSU is not equipped with these options, skip the information that pertains to them.
Be sure to read the safety and regulatory information at the beginning of this guide.
It is assumed that you are familiar with the functional operation of digital data communications equipment.
How to Use This Guide
This guide provides basic information about your DSU, how to install it and verify that it is installed and operating correctly, how to operate the unit and its options, and how to configure it.
Two installation chapters are provided, one for the Model 3550 DSU and one for the Model 3551 DSU. Select the chapter that applies to your DSU.
Refer to the following chapters or appendices, as needed.
Chapter 1 | Provides a general overview of the |
| DSU and its options, information |
| about equipment upgrades and |
| conversions, and the unit's technical |
| specifications. It also includes |
| equipment warranty information and |
| equipment return instructions. |
Chapter 2 | Provides |
| installing your standalone |
| Model 3550 DSU. |
Chapter 3 | Provides |
| installing your |
| Model 3551 DSU. |
Chapter 4 | Describes how to operate your DSU |
| and its DBM and TDM/Flex options. |
Chapter 5 | Presents the basics of setting and |
| changing configuration options, and |
| provides Configuration Option Set |
| Tables, which describe each |
| configuration option in an option set, |
| along with its possible settings. |
Appendix A | Provides a diagram for navigating |
| the DSU's menu structure. |
Appendix B | Summarizes the configuration option |
| sets for you. |
Appendix C | Lists the DSU's status indicators, as |
| well as their messages, identifying |
| when they appear. |
Appendix D | Shows |
| application configurations and |
| network hookups. |
Appendix E | Provides cable and connector pin |
| assignments. |
Appendix F | Equipment List |
Glossary |
|
Reference Card |
|
December 1996 | vii |
