User's Manual

CHAPTER 5 NDA-24300
Page 346
Issue 1
FAULT REPAIR PROCEDURES
5. SPEECH PATH (TSW) SYSTEM FAULT
This section explains the fault repair procedure when any of the faults shown in Table 5-7 has occurred in the
whole system.
5.1 Check Point
When repairing a speech path fault, consider that when any of the faults shown in Table 5-7 have 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.
Table 5-7 Speech Path (TSW) System Fault Situation
FAULTY SITUATION REFERENCE SECTION
• Noise, one-way speech, no tone
• Even if dialing has been made, dial tone does not stop.
Section 5.2, Speech Path System Fault - Fault
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
message or an alarm lamp.
Section 5.4, Speech Path System Fault - STBY Side
Has Become Faulty