Avaya 03-300430 Manual Do Utilizador

This test is destructive.
The CSU ELB (Equipment Loopback) test causes a loop back at the near-edge of the local 
120A CSU module or T1 sync splitter, and tests the connection from the TN767E DS1 board to 
the CSU module/T1 sync splitter (DS1 board edge interconnecting cable, and CSU module/T1 
sync splitter edge). This test will only be performed if the 120A CSU module/T1 sync splitter is 
present, administered, and connected to a 1.544-Mbps TN767E DS1 circuit pack on the back of 
the port carrier.
The test is destructive and can only be initiated by a technician-demanded test ds1-loop 
location ds1/csu-loopback-tests.
Use busyout board to busy out all trunks or ports on the DS1 Interface circuit pack before 

running the ELB test.
When the ELB test is initiated, maintenance software sends a message to the TN767E DS1 
Interface circuit pack to start the test. The board sets up the ELB loop back, transmits a test 
pattern, and verifies that the pattern is received unaltered through the loop back. If the 
transmitted and received pattern is different, the test fails.

0

NO 

BOARD

The test could not relate the internal ID to the port (no board).
This could be due to incorrect translations, no board is inserted, an 
incorrect board is inserted, or an insane board is inserted.

1. Verify that the board’s translations are correct. Use add ds1 

location to administer the DS1 interface if it is not already 

administered.

2. If board was already administered correctly, check the error log to 

determine whether the board is hyperactive. If so, the board was shut 
down. Reseating the board will re-initialize it.

3. If the board was found to be correctly inserted in step 1, enter 

4. Enter reset board
5. Enter release board
6. Enter test board long

This should re-establish the link between the internal ID and the port.

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