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NDA-24300 CHAPTER 7
Page 495
Issue 1
CHAPTER 7 ROUTINE MAINTENANCE PROCEDURE
1. GENERAL
When a fault has occurred in the system, (for example when a fault has occurred to No. 1 circuit on the 16LC
card), the stations connected to No. 1 circuit become unserviceable. When the 16LC card has been replaced with
a spare to analyze the cause of the fault or to repair the fault, other normal lines also become unserviceable. As
in this example, even when the fault is restricted to a single component, it very often harms the system operations
as a whole.
Even if the system is operating normally, it is necessary to perform a routine check to prevent a fault occurrence
before it is too late to discover any latent cause of a fault.
This chapter categorizes the routine maintenance procedures of the PBX into the following three types, and ex-
plains the minimum required work steps and precautions pertaining to each of the three procedures.
• Daily Maintenance Procedure
• Monthly Maintenance Procedure
• Quarterly Maintenance Procedure
1.1 Flow of Procedures
The scheduling of routine maintenance (daily, monthly, quarterly) will vary with each installation and or-
ganization. Figure 7-1 shows the flow of the routine maintenance procedures.
Figure 7-1 Flow of Procedures
Section 2.7, Explanation of Terms in Chapter 2
Section 2, Routine Maintenance Procedures
•
Daily Maintenance Procedures
•
Monthly Maintenance Procedures
•
Quarterly Maintenance Procedures
Note:
Perform procedure performance per
each divided section
Section 3, Routine Maintenance Check Lists
•
Recording of checked items
Chapter 5, Fault Repair Procedures
Chapter 6, System Operations
Chapter 4, Unit/Circuit Card
Replacement Procedure