Avaya CMC1 Manual Do Utilizador

The DS1 span test has 2 parts. 

●

Checking for circuit connectivity

The first part of the test powers-up the loopback jack and sends a signal from the DS1 
circuit pack, through the wiring, to the loopback jack. The test allows about 10 seconds for 
the signal to loop around the loopback jack and return to the DS1 circuit pack. Then it sends 
the results to the management terminal and proceeds to the second part of the test.

●

The second part of the test sends the standard, 3-in-24 DS1 stress-testing pattern from the 
DS1 board, through the loopback jack, and back to a bit error detector and counter on the 
DS1 board. A bit-error rate counter displays the results on the management terminal until 
you terminates the test.

Always perform both parts of the test. Proceed as follows.

Before you go any further, make sure that the problem is actually on the DS1 span by testing 
the equipment that connects to the span at the near end. Test the DS1 circuit pack, and perform 
any needed maintenance or repairs.

Now take the DS1 circuit out of service.

1. Once you are sure that the DS1 circuit pack and ICSU are functioning correctly, go to the 

management terminal and busy out the DS1 circuit pack by typing 

, where 

 is the cabinet number, 

 is the carrier letter, and 

 is the slot number of 

the DS1 board.

1. At the management terminal, open the DS1 administration form. Type 

, 

where 

 is the cabinet number, 

 is the carrier letter, and 

 is the slot number of the DS1 

board.

2. Make sure that the near-end csu type field is set to integrated.

3. Change to page 2 of the DS1 administration form, and confirm that the value of the TX LBO 

field is 0dB. 

4. If the value of the TX LBO field is not 0dB, record the current value. Then set the TX LBO 

field to 0dB for testing. 

5. Press ENTER to make the changes, CANCEL to quit without changes.