Paradyne ACCULINK 316x - Manual (Page 122)

ACCULINK 316x DSU/CSU
4-6 December 1996 3160-A2-GB22-10
Table 4-2
Valid Loopback Combinations
LLB PLB DLB RLB DCLB DTLB
LLB N/A NO YES YES NO YES
PLB NO N/A YES NO NO YES
DLB YES YES N/A NO YES YES
RLB YES NO NO N/A NO YES
DCLB NO NO YES NO YES
(on separate
ports)
YES
(on separate
ports)
DTLB YES YES YES YES YES
(on separate
ports)
YES
(on separate
ports)
Starting a Line Loopback
The Line Loopback command (LLB) loops the
received signal on the network interface back to the
network without change.
To perform a Line loopback,
1. Press F2 to select Test from the top-level display
screen.
F1
DSU ESF
Stat
Test Cnfig
F2 F3
2. From the Test screen, press F2 to select Lpbk.
F1
Test:
Rlpbk Lpbk
Ptrns
F2 F3
3. From the Loopback screen, press F2 to select
LLB.
F1
Loopback:
Abort
LLB PLB
F2 F3
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
Invalid Test Combo appears (see Table 4-2 for
valid loopback test combinations).