FAULT REPAIR PROCEDURES

5.SPEECH PATH (TSW) SYSTEM FAULT

This section explains the fault repair procedure when any of the faults shown in Table 5-7has occurred in the whole system.

Table 5-7 Speech Path (TSW) System Fault Situation

FAULTY SITUATION

REFERENCE SECTION

 

 

• Noise, one-way speech, no tone

Section 5.2, Speech Path System Fault - Fault

• Even if dialing has been made, dial tone does not stop.

Related to Speech

 

 

 

Dial tone cannot be heard.

Section 5.3, Speech Path System Fault - When Dial

 

Tone (DT) Cannot Be Heard

 

 

A fault occurring in the STBY side TSW is indicated by a system

Section 5.4, Speech Path System Fault - STBY Side

message or an alarm lamp.

Has Become Faulty

 

 

5.1Check Point

When repairing a speech path fault, consider that when any of the faults shown in Table 5-7have occurred in the system, it is possible that the TSW circuit card is at fault. Always check the alarm lamps on the TSW circuit card.

CHAPTER 5

NDA-24300

Page 346

Issue 1

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NEC NDA-24300 manual Speech Path TSW System Fault, Faulty Situation Reference Section