Avaya 03-300430 User Manual

This test is destructive.
The Internal Loop-Around test is run by looping the transmitted DS1 bit stream back into the 
UDS1 board’s receiver. The loop occurs just before the DS1 facility interface. The test is highly 
destructive and can only be initiated by reset board location.
Each trunk or port on the UDS1 Interface circuit pack must be busied out using busyout 
board before running the Internal Loop-Around test. When the Internal Loop-Around test is 

initiated, maintenance software sends appropriate messages to the UDS1 Interface circuit pack 
to start the test. The test uses the Tone Generator and Tone Detector to exercise a bit-pattern 
consistency test for every port. If the transmitted and received bit patterns on a trunk or port are 
different, the test fails.
When the test completes, the maintenance software sends a stop loop around message to the 
UDS1 Interface circuit pack to put the circuit pack back into the normal operation mode. Every 
trunk or port of the UDS1 Interface circuit pack is restored to the in-service state after release 
board is entered.

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. Execute add ds1 

location to administer the UDS1 interface if it is not already 

administered.

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

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

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

busyout board location.

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

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

 3 of 3