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4-6
A.The DSU must be optioned for Soft Configuration mode in
order for you to perform LL Mode or DTE Self Test
Pattern selection from the Diagnostics Selection screen. If
NOTE
you attempt either selection while the DSU is in Hard
Configuration mode, the screen displays a message that
the function is not available.
B.When the DSU is in Soft Configuration mode, changes you
make to the LL Mode or DTE Self Test Pattern selection
from the Diagnostics Selection screen also apply to how
those functions operate in response to the front panel
switches.
4. Type the selection number of the test you intend to perform. The
DSU responds by initiating the test and displaying the DeskTop
T1 Diagnostics results screen, as shown in Figure 4-3.
The Diagnostics Results screen displays four lines of information
about the current test and a menu with four selections:
Current Test: identifies the test that is running, including
Unilateral/Bilateral specification for Network Line Loopback or
DTE Local Loopback.
Test Status: displays Running when the screen first
appears; it displays Stopped when you select [1] Stop Test
from the Results screen menu. The menu selection changes to [1]
Restart Test when Stopped is displayed here.
Test Duration: displays how long the test has run.
Bit Errors:is displayed only when the Self Test function is in
use; it normally displays the number of detected errors; it displays
NO SYNC if no test pattern is being received during an end-to-end
test.
In addition to [1] Stop/Restart Test, described together
with Test Status above, and [0] Return to Main
Menu the menu contains two selections:
[2] Inject Single Bit Error enables you to insert
GDC 048R154-000
Diagnostics
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