Zhone Technologies 900 ユーザーズマニュアル

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

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

T1 or E1 network failure

Improper frame relay network configuration

Improper FRS 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 frame relay traffic through 
the FRS card. There are numerous ways of isolating and clearing the problem. When 
troubleshooting frame relay communications problems through an FRS card, follow this 
general sequence:

1. If all Frame Relay traffic is affected, verify that the US/EUR jumper is correctly placed 

to match the US/EUR jumper on the chassis. The FRS card performs a self-test on 
power-up. A “healthy” card will have a green LED lit on the front panel. Do not 
proceed with further steps until a green LED is present.

2. Verify that the T1 or E1 network is working properly by checking for current CGA-Red 

and CGA-Yellow alarms (see Chapter 3-A for alarm viewing instructions). If no CGA 
alarms are present that would affect the frame relay traffic, continue with step 3.

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

port and that the correct type of LMI is selected. If a user card port is used, verify the 
configuration settings on the user card port and the cable connection to the DTE. The 
LMI must be UP for data to flow on the circuit. Do not proceed with further steps until 
the LMI is up.

4. Go to the Port Performance Monitoring Screen by pressing P from the FRS Main 

Screen. Analyze the register and status information provided to help determine the 
cause of the problem.