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8. Testing
3160-A2-GB24-10 March 2001
8-9
Line Loopback (LLB)
The Line Loopback command (LLB) loops the received signal on the network
interface back to the network without change.
Procedure
To perform a Line loopback:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
3. From the Loopback screen, select LLB.
Test Started
appears on Line 2. If a line 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 8-2, Valid Loopback Combinations, for valid loopback test
combinations).
496-14319-02
CSUDSU
NETWORK
INTERFACE
DTE
(DSX-1)
ALL 1s
LLB
PORT 1PORT 2
ALL 1s
ALL
1s
F1
F2
F3
Test:
Rlpbk Lpbk Ptrns
F1
F2 F3
Loopback:
Abort LLB PLB