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Troubleshooting
6-17
9664-A2-GB20-00
March 2000
Physical Tests
Physical Tests can only be commanded for the user data port.
DTE Loopback
The DTE external Loopback (DTLB) test loops the received signal on a user data
port back to the DTE. Use this test for isolating problems on the user data port.
An attached device or test equipment must generate data to be looped back.
99-16284
Network
Port
User
Data
Port
DTLB
CAUTION:
This test will affect the operation of the frame relay PVCs assigned to
the user data port. Any IP data being sent while this test is active will be
disrupted.
To start and stop a DTE Loopback:
Main Menu
→
Test
→
Data Port Physical Tests
View the length of time that the test has been running in the Result column.