AT&T 3.0 manual System Components, Busy-Out/Reset, Test Notes, Power supply

Module Problems

Considerations

Review the following items before you begin a module test procedure.

System Components

Before running a module test, make sure the following system components are working:

■Power supply

■Processor. Save the system programming onto a floppy disk. See System Programming and Maintenance (SPM.) To back up onto a memory card, see Appendix D, “Backing Up with a Memory Card. ”

■Maintenance Terminal (MLX-20L console or PC). To run tests on the MLX module connected to the MLX-20L console, you must run the test from the PC, not from the MLX-20L console.

Busy-Out/Reset

Before running a module test, busy-out or reset the modules. Busy-Out is the best method, but it will not work if any line or extension is on a stable call. See “Busy-Out” and “Reset,” later in this chapter, for more information on these features.

Test Notes

For each test, you should note the following:

■When beginning the board controller test or the internal Ioopback module test, choose to run it once or repetitively.

■You can interrupt any module test by selecting Exit ( (F5) on the PC).

■A module test can fail for one of the following reasons:

— The module being tested was not busied-out. Exit the test, busy-out the module, and try again.

— The error messages indicate that the module is faulty.

■If errors indicate that the module is faulty, record them on the module repair tag immediately after running the test.

Control Unit Problems 4-35