Module Problems

NOTE:

If the system does not recognize a 408 GS/LS-MLX module during testing, check the release number of the system. The 408 GS/LS-MLX module does not work with Releases 1.0 or 1.1. An 008 MLX module must be used to provide extension jacks with Releases 1.0 or 1.1.

To run a module test, follow the steps below.

1To determine which modules are suspect, read the error logs and review any user-reported problems.

2If the error logs indicate the processor is the problem, refer to “Processor Problems,” earlier in this chapter, to service the processor before continuing.

Replacing a faulty processor may resolve module problems.

3Busy-out or reset the module.

See “Busy-Out and Reset” for general guidelines.

4Run the internal Ioopback test.

See “Internal Loopback Test,” later in this chapter. If errors occur, record them as described in “Considerations” above.

5Run the board controller test.

See “Board Controller Test,” later in this chapter. If errors occur, record them as described in “Considerations” above.

6For MLX modules (008 MLX and 408 GS/LS-MLX), continue with the B-Channel Loopback test.

See “B-Channel Loopback Test” later in this chapter. If errors occur, record them as described in “Considerations” above.

7For 100D modules, continue with the CSU Ioopback test.

See “100D Module Problems” later in this chapter. If errors occur, record them as described in “Considerations” above.

8Replace the module with a module of the same type, whether you are troubleshooting or replacing the module permanently.

9Restore the module.

Menu Maintenance Slot Dial the slot no. Restore Yes

4-36Control Unit Problems

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AT&T 3.0 manual Busy-out or reset the module, Run the internal Ioopback test, Run the board controller test