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CHAPTER 5 Operation Procedure for System with PIR
Faulty Situation:
• Fault related to speech such as noise, one-way speech, no-speed, etc. occurs.
• Even if dialling is made, Dial Tone (DT) does not stop.
•[1-C] Both TSW Write Failure
•[1-D] TSW Write Failure
(1) Check to see if fault occurs by extracting TSW circuit cards one by one.
(a) Replace the TSW circuit card by referring to TSW Card Replacement Procedure in this chapter.
(b) Place the TSW circuit card to ACT mode. Refer to How to Control Switching Block in Chapter 2.
(c) Check to see if a Station-to-Station connection can be set up and identify a TSW circuit card respon-
sible for the fault.
(d) Perform the above check by extracting the TSW circuit cards individually.
(2) Check to see if fault occurs by extracting MUX circuit cards one by one.
(a) Replace the MUX circuit card by referring to MUX Replacement: 1-IMG/MUX Replacement: 4-IMG
in this chapter.
(b) Place MUX circuit card to ACT mode. Refer to How to Control Switching Block in Chapter 2.
(c) Check to see if a station-to-station connection can be set up and identify a TSW circuit card responsi-
ble for the fault.
(d) Perform the above check by extracting the TSW circuit cards individually.
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