About This Guide
Document Purpose and Intended Audience
Document Summary
7520-A2-GB20-20
This guide contains information needed to set up, configure, and operate the
Model 7520 DSU and is intended for installers and operators.
Section
Description
About the DSU. Describes the DSU features and shows
Chapter 1
examples of typical configurations.
Using the Asynchronous Terminal Interface. Provides
Chapter 2
instructions for accessing the user interface and navigating
the screens.
Chapter 3
Customizing the DSU. Provides procedures for setting up
the user interface and DSU configuration.
Chapter 4
Monitoring the DSU. Describes monitoring the DSU using
the LEDs, DSU status, and network statistics.
Chapter 5
Testing. Provides details about available tests and test
setup.
Chapter 6
Messages and Troubleshooting. Provides information on
device messages and troubleshooting, and procedures for
resetting the unit and viewing unit identification information.
Configuration Option Tables. Contains all configuration
Appendix A
options, default settings, and possible settings.
Worksheets. Contains all the configuration options, default
Appendix B
settings, and possible settings to use for planning.
Cables and Pin Assignments. Contains connector and
Appendix C
interface information.
Technical Specifications. Contains physical and regulatory
Appendix D
specifications of the DSU.
May 1998
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