Quick Eagle Networks DL3800E User Manual
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DL3800E Inverse Multiplex User’s Guide — July 9, 2001
6
accomplished through DTE loopback and a self test. Testing for the
proper functioning of the remote DL3800E unit is accomplished by a Line
loopback.
It is also possible to verify the path from the DTE through the E1 line to the
remote-end DL3800E, provided the DTE equipment can generate and
detect looped back bit streams.
These suggestions can help determine which portion of the network might
be at fault. When discovering a failure, check the simple solutions first. Is
the power turned on? Is the equipment set up and configured properly?
Will swapping cable pairs solve the problem?
The DL3800E unit is equipped with alarms that alert you to the existence of
possible problems with the unit, and received signals from the DTE or
network. LEDs on the Module provide a quick indication of the status of
that module: green light indicates everything is functioning normally.
Table 6-1 Troubleshooting (1 of 5)
Problem
Solution
DL3800E unit doesn’t
power up.
If the DL3800E unit is AC powered, make sure it is plugged into a live AC
outlet. If it is DC powered, make sure the respective DC leads are not
crossed.
Check all fuses for opens, replace as needed. If the DL3800E unit blows
fuses continuously, call Quick Eagle Networks Technical Support.
You cannot communicate
with the remote DL3800E.
Make sure both units are in Inverse Mux mode, not Single E1 DSU.
Verify that the local and remote units have unique ID’s.
If a DTE device is not connected at either end, set DTE LOSS to None.
Make sure your E1 port LED’s are solid green, indicating that the circuits are
up and running.
The TEST LED on the
DL3800E unit is constantly
on.
Make sure no tests are being initiated, and check the TEST display from a
terminal.
If a test is running, end it by selecting the test and set it to Off in the DTE and
NETWORK TESTS MENU.
Make sure the DTE device or the E1 carrier is not sending loop up and loop
down codes.