NEC Neax 2400 Ipx System Operations And Maintenance Manual

NDA-24307 TABLE OF CONTENTS
Page ix
Issue 1
TABLE OF CONTENTS (CONTINUED)
Pag e
3.4 Collection of System Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 574
3.5 Display of Locked-out Station. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  575
3.6 Fan Unit Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  576
3.7...

TABLE OF CONTENTS NDA-24307
Page x
Issue 1
TABLE OF CONTENTS (CONTINUED)
Pag e
DTF301 Display of UCD Route Peg Count Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 647
DTF302 Display of UCD Group Peg Count Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 648
DTF303 Display of Station Peg Count Data  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 649
DTF501 Display of Attendant Answering Peg Count...

NDA-24307 LIST OF FIGURES
Page xi
Issue 1
LIST OF FIGURES
Figure TitlePage
Figure 2-1 Flow of Administrative Management Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Figure 2-2 NEAX2400 IPX IPX-U  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
Figure 2-3 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
Figure 2-4...

LIST OF FIGURES NDA-24307
Page xii
Issue 1
LIST OF FIGURES (CONTINUED)
Figure TitlePag e
Figure 4-15 Circuit Card Mounting Face Layout of ISWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Figure 4-16 System Block Diagram (IOGT and Other Speech Path Echelons)  . . . . . . . . . . . . . . . . . . . . .  333
Figure 4-17 FANU Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  346
Figure 4-18...

NDA-24307 LIST OF FIGURES
Page xiii
Issue 1
LIST OF FIGURES (CONTINUED)
Figure TitlePag e
Figure 6-7 Line Load Control Operations on ATTCON—Cancelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  459
Figure 6-8 Line Control Indication (ATTCON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  459
Figure 6-9 Line Load Control Key Operations on DESKON—Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . .  460
Figure 6-10 Line Load Control...

LIST OF FIGURES NDA-24307
Page xiv
Issue 1
LIST OF FIGURES (CONTINUED)
Figure TitlePag e
Figure 6-56 IOGT/TSW/HSW/DLKC/MUX in STBY Mode  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  538
Figure 6-57 Speech Path System Changeover via Active IOGT MBR Key. . . . . . . . . . . . . . . . . . . . . . . . .  539
Figure 6-58 LED Indications Before and After Speech Path System Changeover . . . . . . . . . . . . . . . . . . .  540
Figure 6-59 PLO/CLK in ACT/STBY Mode . . . . . . . . ....

NDA-24307 LIST OF TABLES
Page xv
Issue 1
LIST OF TABLES
Table TitlePage
Table 2-1 How to Follow This Manual Guide   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 2-2 Kinds of Circuit Card Front Restart  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 3-1 List of System Messages   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 3-2 Error...

LIST OF TABLES NDA-24307
Pag e x vi
Issue 1
This page is for your notes. 

NDA-24307 CHAPTER 1
Page 1
Issue 1
CHAPTER 1 INTRODUCTION
1. GENERAL
This manual describes routine system maintenance and fault repair procedures. This chapter explains how to
follow the manual and provides precautions pertaining to maintenance jobs as a whole. Be sure to read this chap-
ter thoroughly before starting the required maintenance job.
2. HOW TO FOLLOW THE MANUAL
If technicians engage in a fault repair with a sufficient amount of knowledge of the system (system
configurations, controlling...

CHAPTER 1 NDA-24307
Pag e 2
Issue 1
INTRODUCTION
 When only the contents of a system message needs to be known, or when a fault is to be diagnosed
from a system message
 When the range of faulty conditions has been specified and a faulty circuit card can be assumed
 When investigating the system for the purpose of a fault repair
 When replacing a unit/circuit card with a spare
 When performing routine maintenance
Chapter 5
See Section 4, Repo rting Fault to NEC, in Chapter 2. Chapter 5
See Section...