User guide

5-1
5
Diagnostics 5
This chapter explains using diagnostics to locate and resolve problems
with the Solo E1 DSU and/or equipment connected to the Solo E1 DSU.
Verify your connections and circuits to troubleshoot problems by running
built-in diagnostic and pattern tests. These tests can isolate problems when
they occur. In most cases, you wonÕt need to use test equipment.
Diagnostic Considerations
Running a test interrupts payload trafÞc. Run the tests at off-peak hours or
during a designated maintenance window.
Running A Diagnostic
To run a test with Menu-9 Diagnostics (Figure 5-1):
1. Select the test in the Next Test.
These are Full Bandwidth loop code, Fractional loop code and
USER1 Pattern and USER2 Pattern. The selections for fractions are
Full (Bandwidth), and DATA01.
The 20 test selections cycle with the up or down arrow key. For quick
access to a speciÞc test use the shortcut key (refer to Table 5-1).
2. Set the Next Test Length: unlimited, 60 min, 15 min, 1 min.
3. Press s to start the test.
4. Press y to conÞrm.
Press any other key to cancel your action.
The test results are shown in the upper half of the screen.
5. To end the test, press e, then y to conÞrm
Or any other key to leave the test running.
6. To clear the pattern error counter, press c , then y to conÞrm.
Or any other key to cancel.