Testing

152-388-100-02, Issue 2

 

 

4Have the CO tester send the NLOC (4-in-7) inband loopup for 5 seconds. You should be able to observe the NLOC message on the front-panel display. (The Status LED on the front panel should be yellow, and the loopback mode should also be identified on the Span Status screen.)

5Repeat Step 2. If the test passes, the problem is in the downstream direction. If it fails, the problem is in the upstream direction.

Figure 27. Loopback Modes

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June 6, 2000

H2TU-C-388 List 1