Table of Contents
Advertisement
ACCULINK 3163 DSU/CSU
Starting a Line Loopback
The Line Loopback command (LLB) loops the
received signal on the network interface back to the
network without change.
DSU
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
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
loopback test combinations).
4-12
CSU
NETWORK
LLB
INTERFACE
98-15946
Ptrns
F2
F3
LLB
PLB
F2
F3
Table 4-5
for valid
Starting a Payload Loopback
The Payload Loopback command (PLB) loops the
received signal on the network interface back to the
network after it has passed through the framing circuitry
of the DSU/CSU. Framing CRCs and BPVs are corrected.
DSU
ALL 1s
PORT 1
"
Procedure
To perform a Payload loopback:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
3. From the Loopback screen, select PLB.
Test Started appears on Line 2. If a Payload
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
valid loopback test combinations).
March 1999
CSU
NETWORK
PLB
INTERFACE
98-15947
Test:
Rlpbk Lpbk
Ptrns
F3
F1
F2
Loopback:
Abort
LLB
PLB
F1
F2
F3
Table 4-5
3163-A2-GB20-10
for
Advertisement
Chapters
Table of Contents
