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8. Troubleshooting
9700-A2-GB20-20 December 2002 8-23
Data Port Physical Tests
The FrameSaver DSL CSU/DSU supports a single physical test for the data port,
the DTE Loopback. This test does not appear for the router.
DTE Loopback
The local DTE external Loopback (DTLB) loops the received signal on the DTE
interface back to the DTE without affecting the operation of the remaining ports.
Use this test to isolate problems on the user data port.
Main Menu
Test Data Port Physical Tests
An attached device or test equipment must generate the data to be looped back,
and the Port (DTE) Initiated Loopback option must be enabled. Refer to
Configuring the CSU/DSU’s Data Port Physical Interface
in Chapter 4,
Configuration Options.
CAUTION:
This test may affect operation of frame relay PVCs for the port. Any data
being sent while this test is active will be disrupted.
99-16284
Network
Port
User
Data
Port
DTLB