Table of Contents
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Overview
This chapter describes the test functions of the DeskTop T1 DSU and
provides instructions for their use. There are three ways to control tests
locally:
•
Terminal Interface Diagnostics Selection screen enables you to
command all DSU tests
•
Front panel switches enable you to command all but three of the
DSU tests
•
DTE interface signals can command two tests – DTE Local and
Remote Loopbacks.
The DSU can also be commanded remotely into tests that involve
looping the networks signal back to be checked for errors at the remote
site. The remote site DSU transmits inband loop codes to command
remote loopbacks at the local unit. This chapter identifies the tests that
can be commanded remotely.
The structure of the chapter is based on the terminal interface
Diagnostic Selection screen since it includes all the the test functions.
The other two means of diagnostic control are limited to subsets.
The table on the following page lists the available tests and how each
can be commanded.
4 Diagnostics
GDC 048R154-000
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