Test Commands; Remote Loopback Tests - Paradyne 3172 Operator's Manual

ACCULINK 3172 and 3174 E1 DSU/CSU

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.
To access all Test commands from the Test branch,
press F2 to select Test from the top-level menu screen.
DSU E1 CEPT
Stat Test
F1 F2

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 Test Combo (Invalid Test
Combination) appears.
To send a Data Channel Activation or Deactivation
loopback sequence to the far-end E1 DSU/CSU:
"
Procedure
1. Press F2 to select Test from the top-level menu
screen.
2. From the Test screen, press F1 to select Rlpbk.
Test:
Rlpbk Lpbk
F1
4-14
Cnfig
F3
Ptrns
F2 F3
March 1999
3. From the Rem Loopback screen, press the
Function key that corresponds to the specific
loopback test you want to perform.
Rem Loopback:
DCLBUP
F1
The Rem Loop screen appears, where Type is
either DCLBUP or DCLBDN.
Rem Loop: Type
Prt1 Prt2
F1
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 affecting transmission
of the loopback sequence.
DCLBDN
F2 F3
Prt3
F2 F3
3170-A2-GB20-30