AT&T 3.0 manual Internal Loopback Test

Module Problems

The screen below appears when the Restore fails. Try again, and be sure to specify the correct slot.

Console Display/Instructions Additional Information P C

Restore Slot xx:

Restore FAILED Board Mismatch

xx= slot number entered in Step 2

Exit

Internal Loopback Test

This test checks communication between the processor and the module

being tested. If you have not read “Module Test Process” above, do so before continuing.

Summary

Console Procedure

PC Procedure

Appropriate Modules

Time Estimate

Menu →Maintenance →Slot →Dial the slot no. →

Enter →Demand Test →IntLoopback →Test Once or

Test Repetitive.

(F6) →(F2) →Type the slot no. →(F10) →(F6) →(F3) →(F2) or (F3)

This test can be run on any module. The 100D module and the 408 GS/LS-MLX module each have two digital switch elements (DSEs); both DSEs are tested.

It takes approximately 1.5 minutes to run each test, The 10OD module and 408 GS/LS-MLX module each take approximately 3 minutes, because they each have two DSEs.

Control Unit Problems 4-45