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8. Troubleshooting
8-30
September 2002 9128-A2-GB20-80
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
→
Test
→
Data Port Physical Tests
An attached device or test equipment must generate data to be looped back.
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.
98-16190
Network
Interface
DSX
Interface
DTE
Port 1
DTE
Port 2
All 1s
DTLB DTLB