NEC NDA-24300 manual Speech Path System Fault Fault Related to Speech

FAULT REPAIR PROCEDURES

5.2 Speech Path System Fault - Fault Related to Speech

Faulty Situation:

•Fault related to speech such as noise, one-way speech, no-speed, etc. occurs.

•Even if dialing started, Dial Tone (DT) does not stop.

•[1-C] Both TSW Write Failure

ATTENTION

Contents Static Sensitive

Handling Precautions Required

•[1-D] TSW Write Failure

(1)For Dual Configuration

START

Check to see if fault occurs by extracting TSW circuit cards one by one.

Check to see if fault occurs by extracting MUX circuit cards one by one.

A

B

Replace the TSW circuit card referring to Section 2.3.2, TSW Card Replacement Procedure, in Chapter 4.

Place the TSW circuit card into ACT mode by flipping the MBR key on the active GT (PH- GT09) card. Refer to Section 12.1.6, Manual System Changeover of Speech Path System, in Chapter 6.

Check to see if a station-to-station connection can be set up and identify a TSW circuit card responsible for the fault.

Perform the above check by extracting the TSW circuit cards individually.

Replace the MUX circuit card referring to Section 3.3.2, MUX Card Replacement Procedure, in Chapter 4.

Place the MUX circuit card into ACT mode by flipping the MBR key on the active GT (PH-GT09) card. Refer to Section 12.1.6, Manual System Changeover of Speech Path System, in Chapter 6.

NDA-24300CHAPTER 5

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