8. Troubleshooting

DTE Loopback

The DTE external Loopback (DTLB) test loops the received signal on a DTE interface back to the DTE without affecting the operation of the remaining ports. Use this test for isolating problems on the DTE interface.

Main Menu TestData Port Physical Tests

An attached device or test equipment must generate data to be looped back.

DSX

Interface

All 1s

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DTLB

 

DTLB

 

 

 

 

 

DTE

 

DTE

 

Port 2

 

Port 1

Network Interface

98-16190

CAUTION:

This test may affect operation of frame relay PVCs assigned to the selected port. Any IP data being sent while this test is active will be disrupted.

8-30

September 2002

9128-A2-GB20-80

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Paradyne 9128-II, CSU, DSU, 9126-II manual DTE Loopback, Main Menu → Test→ Data Port Physical Tests, Dsx, Dtlb DTE