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4. Maintenance
3160-A2-GB21-90 February 2001
4-29
4. Select DTLB.
5. From the DTLB screen, press the Function key for the port for which you want
to perform the data terminal loopback. Use the scroll keys, if necessary.
Test Started
appears on Line 2. If a Data Terminal 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, Valid Loopback Combinations, for valid loopback test
combinations).
Aborting Loopbacks
The Abort Loopback command stops all loopback tests or any selected loopback
test currently active on the DSU/CSU.
Procedure
To abort one or more loopback tests:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
3. From the Loopback screen, select Abort.
F1
F2 F3
Loopback:
RLB DCLB DTLB
F1
F2
F3
Loopback: DTLB
Prt1 Prt2 Prt3
F1
F2 F3
Test:
Rlpbk Lpbk Ptrns
F1
F2
F3
Loopback:
Abort LLB PLB