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TRACER 2 x E1 User’s Manual
61280004L2-1C
Section 4 Troubleshooting
33
“LBK-A” or “LBK-B” is Lit
This indicator will activate when a software or front panel command E1 loopback has been established.
Recommended Action
Possible Cause (see list below)
• A loopback has been commanded from the VT100 user interface. ......... 1,2
• The “LBK-A” or “LBK-B” button has been pressed. .............................. 1,2
Recommended Actions:
1. Through the VT100 user interface, deactivate the loopback in the Loopback Menu.
2. Press the “LBK-A” or “LBK-B” button to deactivate the loopback.
LOS/OOF Light on E1A or E1B
The LOS/OOF indicator will flash when an out of frame error has occurred.
This indicator will remain on (solid) if a loss of signal has occurred on the E1.
Recommended Action
Possible Cause (see list below)
• TRACER is receiving no E1 signal ............................................. .1,2, 3, 4, 5
• The connection at the E1 input or E1 equipment is faulty .......................... 6
• A compatibility or set up problem exists between TRACER and the
E1 equipment……. ...................................................................................... 7
Recommended Action
1. Reset the E1 equipment and verify operation.
2. Verify the presence of an E1 signal using an E1 test set.
3. Check the far-end equipment for alarms or an UA1 condition.
4. Check the E1 connections at the far-end equipment.
5. Reset the far-end equipment.
6. Verify that all cables and connectors are properly wired.
7. Check CCS/CAS settings of all equipment to assure compatibility.
I M P O R T A N T
If problems persist after you have followed the Recommended Actions, contact ADTRAN
Technical Support at (011) 256-963-8716.