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CHAPTER 1 General
• The following is an example where the fault was recovered after the replacement of circuit cards:
(9) When a fault recovery is completed, use the RALM command to clear all the alarm indications and regis-
tered system messages. If required, restore temporary cross connections and transient data for testing to the
original ones.
4.2 How to Follow Diagnostic Procedure/Fault Repair Procedure
(a) Diagnostic Work
A fault diagnostic procedure by system message is explained in the TREE format on an individual sys-
tem message basis.
Set the first circuit card back into its mounting slot
If the fault recurs: Replace the circuit card.
Set the second circuit card back into its mounting slot
If the fault recurs: Replace the circuit card.
Set the third circuit card back into its mounting slot
If the fault recurs: Replace the circuit card.
If a circuit card is found faulty, send the faulty circuit card for repair.
The fault may be a temporary one, or due to poor contact of the circuit card. Observe the
situation for a while.
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