ADC H2TU-C-388 Manuale Utente Scaricare il pdf (Pagina 52)

Testing 152-388-100-02, Issue 2

44 June 6, 2000 H2TU-C-388 List 1

4 Have 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.)

5 Repeat 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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ADC H2TU-C-388 Manuale Utente Pagina 52