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Monitoring and Testing
Starting a Line Loopback
"
4-20
The Line Loopback command (LLB) loops the received signal on the network
interface back to the network without change.
DSU
CSU
ALL 1s
PORT 1
Procedure
To perform a Line loopback:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
Test:
Rlpbk Lpbk
F1
3. From the Loopback screen, select LLB.
Loopback:
Abort
LLB
F1
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 4-7
for valid loopback test combinations).
March 1999
NETWORK
LLB
INTERFACE
98-15946
Ptrns
F3
F2
PLB
F2
F3
3166-A2-GB20-20
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