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
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 |
|
|
Problem | Solution |
|
|
DL3800E unit doesn’t | If the DL3800E unit is AC powered, make sure it is plugged into a live AC |
power up. | 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 | Make sure both units are in Inverse Mux mode, not Single E1 DSU. |
with the remote DL3800E. | 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 | Make sure no tests are being initiated, and check the TEST display from a |
DL3800E unit is constantly | terminal. |
on. | 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. |
|
|
DL3800E Inverse Multiplex User’s Guide — July 9, 2001 |
