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CHAPTER 5 Operation Procedure for System with PIR
3.1 LINE FAULT
This section explains the fault repair procedure in a case where only one specific station line is in any of the
faulty conditions listed in Table 5-2.
3.1.1 Check Point
When repairing a line fault, consider the following items:
(1) Check alarm lamps on line circuit cards.
(2) Check the fault line on the MDF.
Table 5-2 Line Fault Situation
FAULTY SITUATION REFERENCE SECTION
When Dial Tone cannot be heard Section 3.1.3, Line Fault - When DT Cannot Be Heard
When dialing results in a wrong connection
Section 3.1.4, Line Fault - When Dialing Results in Wrong
Connection
When the bell does not ring Section 3.1.5, Line Fault - When Bell Does Not Ring
When call cannot be answered and speech cannot be
made
Section 3.1.6, When Call Cannot Be Answered and Speech
Cannot Be Made
Dterm Fault Section 3.1.7, Line fault - Dterm
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