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NDA-24300 CHAPTER 5
Page 311
Issue 1
FAULT REPAIR PROCEDURES
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.
ISDN Line Fault • A specific DCH/PRT card is faulty.
• When the signal transmission line is a digital line,
transmission/receiving of control signals cannot be
performed.
Section 13.3, Specific DCH/PRT
Card Is Faulty and
Section 13.4, Fault of DCH, DTI,
and Related Flat Cable
Hard Time Clock Fault EMA card is faulty. Section 14, Hard Time Clock Fault
Table 5-2 Line Fault Situation
FAULTY SITUATION REFERENCE SECTION
When Dial Tone cannot be heard Section 1.3, Line Fault - When Dial Tone (DT) Cannot Be Heard
When dialing results in a wrong connection Section 1.4, Line Fault - When Dialing Results in Wrong
Connection
When the bell does not ring Section 1.5, Line Fault - When Bell Does Not Ring
When call cannot be answered and speech cannot be
made
Section 1.6, When Call Cannot Be Answered and Speech
Cannot Be Made
D
term
Fault Section 1.7, D
term
Fault
Table 5-1 Fault Repair Procedure Quick Reference (Continued)
FAULTY ITEM FAULTY SITUATION REFERENCE SECTION