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4-25
3160-A2-GB21-80
March 1999
Starting a DTE Loopback
The DTE Loopback command (DLB) loops the received signal on the DTE
Drop/Insert (DSX-1) port back to the DTE without change.
496-14317-02
CSUDSU
NETWORK
INTERFACE
DTE
(DSX-1)
DLB
PORT 1PORT 2
ALL 1s
" Procedure
To perform a DTE loopback:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
F1
Test:
Rlpbk Lpbk Ptrns
F2
F3
3. From the Loopback screen, press the key until the DLB selection
appears on the screen.
4. Select DLB.
F1
Loopback:
LLB PLB DLB
F2
F3
Test Started appears on Line 2. If a DTE loopback is already in progress,
the Already Active message appears. If an invalid combination of
loopbacks is in progress, the error message Invld Test Combo appears
(see Table 4-8 for valid loopback test combinations).