Starting A Data Channel Loopback - Paradyne 3172 Operator's Manual

ACCULINK 3172 and 3174 E1 DSU/CSU
3. From the Loopback screen, press
display the RLB selection on the screen.
Loopback:
Abort
F1
4. Press F3 to select RLB.
Loopback:
PLB
F1
Test Started appears on Line 2. If a Repeater
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).

Starting a Data Channel Loopback

The Data Channel Loopback command (DCLB) loops
the data received from the network interface, for all DS0
channels allocated to the selected port, back to the
network. The loopback occurs after the data passes
through the port circuitry but before it is sent out the data
port.
To perform a Data Channel loopback:
"
Procedure
1. Press F2 to select Test from the top-level menu
screen.
4-18
twice to
LLB PLB
F3
F2
DLB RLB
F2 F3
Table 4-8 for
2. From the Test screen, press F2 to select Lpbk.
3. From the Loopback screen, press
to display the DCLB selection on the screen.
4. Press F3 to select DCLB.
5. From the DCLB screen, press the Function key for
the port for which you want to perform the data
channel loopback. Use the scroll keys, if
necessary.
Test Started appears on Line 2. If a Data Channel
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
Test:
Rlpbk Lpbk Ptrns
F3
F1 F2
three times
Loopback:
Abort LLB PLB
F1 F2 F3
Loopback:
DLB RLB DCLB
F1 F2 F3
Loopback: DCLB
Prt1 Prt2 Prt3
F3
F1 F2
Table 4-8
3170-A2-GB20-30
for