Zhone Technologies 900 ユーザーズマニュアル

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Model No.

Running Head

Refer to Appendix B in the System Reference Guide for further information on Error 
Messages regarding this card.

Problems with a ATM card could indicate a number of causes. Some possibilities are:

T1 or E1 network failure

Improper installation of ATM child card

Improper ATM card configuration

Improper user card configuration

Faulty cabling between the DTE and user card

Improper DTE configuration

Typically, a problem is indicated by the inability to send or receive ATM traffic through the 
ATM card. When troubleshooting communications problems through an ATM card, follow 
this general sequence:

1. Verify that the T1 or E1 networks are working properly by checking for current 

CGA-Red and CGA-Yellow alarms. If no CGA alarms are present that would affect 
ATM traffic, continue with step 2.

2. Verify that the ATM card’s DS3 port is functioning properly. Use the built-in loopback 

commands (LB CFG, LB GEN, LB DET) from the ATM Main Screen to test the 
external connection, as detailed earlier in this chapter. Loopbacks are available on the 
DS3 port only.

3. Verify that the ATM card’s User Network Interface (UNI) is up (accessed by pressing 

N from the ATM card Main Screen). 

4. Review the performance statistics of each active port (accessed by pressing P from any 

port screen). Analyze the information provided on these screens to help determine the 
cause of the problem, as detailed earlier in this chapter.

5. Verify that all cards programmed to output traffic to the ATM card are functioning 

properly and that their output is directed to the proper card slot (the slot in which the 
ATM card is installed).

6. Verify that the ATM port is connected to the proper WAN card and time slot or user 

card port. If a user card port is used, verify the configuration settings on the user card 
port and the cable connection to the DTE.

7. If the ATM card is determined to be faulty, replace it and return the faulty unit for repair 

to the location specified by your distributor.