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ACCULINK 317x E1 DSU/CSU
4-14 December 1996 3170-A2-GB20-20
Test Commands
The
test commands enable you to run loopbacks and
test patterns on the E1 DSU/CSU, and to test the front
panel LEDs. These tests can help you isolate areas of
trouble if you are having problems with your E1
DSU/CSU.
T
o access all T
est commands from the T
est branch,
press F2 to select T
est from the top-level menu screen.
F1
DS
U E
1 CEPT
Stat Test Cnfig
F2
F3
Remote Loopback Tests
The
Remote Loopback tests enable you to troubleshoot
your circuit by sending the following to a far-end E1
DSU/CSU:
• Data channel loopback up (DCLBUP) activation
sequence to initiate a V
.54 Loop 2
• Data channel loopback down (DCLBDN)
deactivation sequence to terminate a V
.54 Loop 2
You cannot perform remote loopbacks if any of the
local loopbacks are active. If you attempt to do so, the
error message
Invld T
est Combo (Invalid Test
Combination) appears.
T
o send a Data Channel Activation or Deactivation
loopback sequence to the far
-end E1 DSU/CSU,
1.
Press F2 to select T
est from the top-level menu
screen.
2. From the T
est screen, press F1 to select Rlpbk.
F1
Test:
Rlpbk Lpbk Ptrns
F2
F3
3.
From the Rem Loopback screen, press the
Function key that corresponds to the specific
loopback test you want to perform.
F1
Rem Loopback:
DCLBUP DCLBDN
F2
F3
The
Rem Loop screen appears, where
Type
is
either DCLBUP or DCLBDN.
F1
Rem Loop:
Type
Prt1 Prt2 Prt3
F2
F3
The
DCLBUP and DCLBDN commands send the
requested sequence out the network interface on
the DS0 channels allocated to the port you select
here.
4.
From the Rem Loop screen, press the desired
Function key to select the specific port. Use the
scroll keys, if necessary
.
After you select a port, the sequence is sent to the
far-end E1 DSU/CSU. During this time, Sending
appears on Line 2 of the LCD, followed by
Command Complete
when the sequence is
complete.
During the Sending
message, you can press the
and
keys without af
fecting transmission
of the loopback sequence.