NEC Neax 2400 Ipx System Operations And Maintenance Manual

							NDA-24307 CHAPTER 2
Page 23
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SYSTEM MAINTENANCE OUTLINE
Pattern 2 When the system has a Fusion link with other IPX series and an NCN exists within the system
If the system has a Fusion link also with other IPX series (i.e. the Fusion nodes exist also outside the
system), an NCN can be assigned from either Local Nodes outside the system or the Local Nodes
inside the system. In this example, LN0 of the IPX-U system is designated as the NCN.
Figure 2-18  Example of NCN Assignment (2/3) Note 1:
The network-level data (NDM data) can be assigned only at the NCN. However, other node-
level data (LDM data) must also be assigned at each node (including ISW), depending on the
requirements. For more details, refer to the “Installation Manual (IPX-U Type)” or the
“Fusion Network System Manual.”
Note 2:When the system is operated, the function to be performed by the ISW is only to provide PCM
time slot switching between the Local Nodes. However, an FPC (Fusion Point Code) must be
assigned also for the ISW together with other Local nodes, by using the ASYDL command. 
NDM
IS W  :  In te r-n o d e  S w itch
LN   :   Local  Node
NCN :  N etwork Control NodeD M    :  D ata M em ory
L D M :  L o ca l D a ta  M e m o ry
NDM: Network Data MemoryFPC   :  Fusion Point Code
TELN:   Telephone  Number
M AT  :  M aintenance Adm inistration Term inal
......
......
LN0
IS WLN1
LN3 LN2
...... ............
............
............
......
......
............
............
............
............
............
............
............
......
......
............
............
............
......
(F P C = 15) (F P C = 16)
(F P C = 17)
(FPC=19) (FPC=18)
LN-C(FP C=3)
LN-A(F P C = 1)
N ote  2
LDMNDM
DM
Assignm ent of NDM  D ata
        via C en tra lized  M AT
ND M
ND M
NDM
NDM
NDM
Note 1
Network Control Node
ND
M
 D
ata
 
Cop
y
Station B
TELN: 42005
Station D
TELN: 45007
       S ta tio n  E
TELN : 47001
       S ta tio n  G
TE LN: 49012
Station C
TELN: 43002Station A
TELN: 41000
......
............
............
............
......
...... ............
............
............
......
......
............
......
......
......
IPX-U
System
Station F
TELN: 48003
ND M
LN-B(F P C = 2)
Fusion Link
Network Data Memory
-System Data
ASYDN, AFMU, ALRTN....
-Number Planning Data
ANPDN, ASPAN....
-Station Numbering
ALGNN, ALGSN....
...... 
						

							CHAPTER 2 NDA-24307
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SYSTEM MAINTENANCE OUTLINE
Pattern 3  When the system has a Fusion link with other IPX series and an NCN exists outside the system
If the system has a Fusion link also with other IPX series (i.e. the Fusion nodes exist also outside the
system), an NCN can be assigned from either Local Nodes outside the system or the Local Nodes
inside the system. In this example, LN-A (NEAX2400IPX series, 4-IMG type) outside the system is
designated as the NCN.
Figure 2-18  Example of NCN Assignment (3/3) Note 1:
The network-level data (NDM data) can be assigned only at the NCN. However, other node-level
data (LDM data) must also be assigned at each node (including ISW), depending on the
requirements. For more details, refer to the “Installation Manual (IPX-U Type)” or the “Fusion
Network System Manual.” 
Note 2:When the system is operated, the function to be performed by the ISW is only to provide the PCM
time slot switching between the Local Nodes. However, a FPC (Fusion Point Code) must be
assigned also for the ISW together with other Local nodes, by using the ASYDL command. 
ISW  :   Inter-node Switch
LN    :  Lo ca l N o de
NCN:  Network Control NodeD M    :  D a ta  M e m o ry
LDM :   Local  Data   M e mory
NDM: Network Data MemoryF P C    :  F u s io n  P o in t C o d e
TELN:   Telephone Number
M AT  :   Maintenance Administration Ter minal
      Sta tio n  G
TELN: 49012
ND M
......
............
......
...... ............
............
........ .. . .
.. .. . .
NDM
......
......       S ta t i o n   F
TELN : 48003LN-B(F P C = 2 )
LN -C(FPC =3)
Fusion Link
......
............
............
............
............
........ .. . .
.. .. . .......
............
......LN-A(FP C =1)
LDMNDM
DM
Assignment of NDM  Data
        via C entra liz ed M A T
Note 1 Station E
TELN: 47001
Network Control Node
Station B
TELN: 42005       S ta tio n  A
TELN: 41000
...... ......IS WLN 1
LN3 LN2
......
............
............
............
......
...... ............
............
........ .. . .
.. .. . .
(FPC=15)(FPC=17)
(FPC=19) (FPC=18)N o te 2
ND M
ND M
NDM
NDM
LN0...... ............
............
........ .. . .
.. .. . .
(FPC=16)
ND M
Station D
TELN: 45007
TELN: 43002
       S ta tio n  C
...... ............
............
........ .. . .
.. .. . .
IP X-U
System
NDM Data Copy
Network Data Memory
-System Data
ASYDN, AFMU, ALRTN....
-Number Planning Data
ANPDN, ASPAN....
-Station N um bering
ALGNN, ALGSN....
...... 
						

							NDA-24307 CHAPTER 2
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SYSTEM MAINTENANCE OUTLINE
2.5 System Messages
System messages display during routine diagnosis, system operation status controlling, and fault
occurrence. Figure 2-19 shows an example of a system message.
Refer to Chapter 3 for details on each message.
Figure 2-19   System Message Example (1)           SYSTEM MESSAGE 3-E SUP LOCK UP FAILURE (TEMPORARY)
(2) NEC TOKYO
(3) LP00-0-ACT
(4)
4:0000 0000 0000 0000      5:0000 0000 0000 0000      6:0000 0000 0000 0000 1:1102 0000 0000 0000      2:0000 0000 0000 0000      3:0000 0000 0000 0000
7:0000 0000 0000 0000      8:0000 0000 0000 0000      9:0000 0000 0000 0000
Meaning:
(1)    :    SYSTEM MESSAGE 3-E     SUP     LOCK-UP FAILURE (TEMPORARY)
Meaning of the message
System Message Level
(Indicated by Alarm Lamp)Note 2
System Message Number
(2)   :   Office Name, Date and Time
(3)   :   LP00-0-ACT
ACT/STBY indication for dual systems
Faulty processor/Related processor 
No.0/No.1 system indication for dual systems
(4)   :   Message detail data (notation by hexadecimal numbers)
Note 1:The data here indicates the Office Name, uniquely assigned to each node and ISW. This
can be set by using the ASYD (SYS1, Index 96-115) or AOFC command.
Note 2:There are four kinds of alarm information to be indicated by alarm lamps: MN, MJ, SUP,
and NON indications.
JUL 24 09:35 Note 1 
						

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SYSTEM MAINTENANCE OUTLINE
2.6 Fault Detecting Function
The system finds a fault by its fault detecting circuit and the fault detecting program. Once a fault occurs,
the system initiates a remedial action such as system changeover, make-busy setting, or restart processing
by the automatic diagnosis function. This action reduces the influence of the fault so that system servicing
may be minimized. The result of the process taken and the fault situation are indicated for equipment con-
cerned.
Among the faults, those related to speech path (noise, one-way speech, speech inability, etc.) are not
detectable. Since these fault reports are to be obtained from a station or operator, periodic trunk tests must
be performed without failure to detect the faults related to speech path.
Figure 2-20 and Figure 2-21 shows an outline of fault detection, and Figure 2-23 shows a block diagram
of fault detection. 
						

							NDA-24307 CHAPTER 2
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SYSTEM MAINTENANCE OUTLINE
Figure 2-20   Fault Detection General Diagram (via Alarm Lamps on TOPU)
Indication of Fault Occurrence Information Collection
and DiagnosisExample of Faults
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
MMC
 Indication of
Alarm Lamps
       on TOPU
MMC
 Indication of
Alarm Lamps
       on TOPU
MMC
 Indication of
Alarm Lamps
       on TOPU
MMC
 Indication of
Alarm Lamps
       on TOPU
Indication 
of Audible
and Visual Alarm
Indicating Panel
LN0
LN1
ISW
LN2
LN3
MMC
EMA
EMA
EMA
EMA
Note:  Alarm Indicating Panel indicates the fault information on both ISW and other Local Nodes (fault notification on  a system
            basis). Meanwhile, alarm lamps on the TOPU for ISW and Local Nodes (indicated in dotted lines above) provide the fault 
            indication only related to the belonging node. For more details, refer to CHAPTER 6.
 Indication of
Alarm Lamps
       on TOPUEMA
MJNEC
ONOFFBELL
......
......
......
......
......
......
......
......
......
...... 
						

							CHAPTER 2 NDA-24307
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SYSTEM MAINTENANCE OUTLINE
Figure 2-21   Fault Detection Block Diagram (via Display of System Messages)
Indication of Fault Occurrence Information Collection
and DiagnosisExample of Faults
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
CPU
Fault of line/trunk card
TSW write failure,
Fault of clocks, etc.
Abnormal temperature,
power supply failure,
fuse blowing, etc., within
the equipment frame
MMC
MMC
MMC
MMC
LN0
LN1
ISW
LN2
LN3
MMC
EMA
IOC
IOC
IOC
IOC
IOC EMA
EMA
EMA
EMA
Note:In addition to the connection to a port of IOC (PH-IO24) circuit card, a MAT can be connected also to the
Ethernet via LAN Interfaces (PZ-PC19: PCI Slot 01 of each CPR).
...-:;..+..*...-:;..+..*...-:;..+..*...-:;..+..*
Display of
System Messages
LANI
...-:;..+..*...-:;..+..*...-:;..+..*...-:;..+..*
Display of
System Messages
...-:;..+..*...-:;..+..*...-:;..+..*...-:;..+..*
Display of
System Messages
...-:;..+..*...-:;..+..*...-:;..+..*...-:;..+..*
Display of
System Messages
...-:;..+..*...-:;..+..*...-:;..+..*...-:;..+..*
Display of
System Messages
...-:;..+..*...-:;..+..*...-:;..+..*...-:;..+..*
Display of
System Messages
LANI
LANI
LANI
LANI
Ether
- Symbols - 
EMA: PH-PC40             MMC:  PH-M22            LANI:  PZ-PC19            IOC:  PH-IO24 
						

							NDA-24307 CHAPTER 2
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SYSTEM MAINTENANCE OUTLINE
Figure 2-22   Fault Detection Block Diagram
PWR
PWR
GT
DLKC
GT
PWR
GTGT
DLKC
To/From TSW
    of each LN
MJ, MN fault
Power, Fuse blown fault
Temperature, CPU fault
Speech Path System fault (SPE)
RGU, Howler fault
PFT fault
CPU Clock fault Note:
CPU
EMAMMC
To  M AT,
Printer, etc.
Alarm Lamps on the TOPU
Thermal Reed Relay
RDY
Clock
etc.
Howler
Ringing
Circuit
Fault
Information
Note
PWR Supply
Failure,
Fuse Blown
Firmware
    Fault
C-level
monitor
C-level
monitor
TSW/
INT
LC/TRK
MUX
TSWM1
TSW/
INTTSW/
INTTSW/
INT
LC/TRK
MUX
TSWM0
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
IOC
LANI
To TSW
of ISWMTo TSW
of ISWM
CPU
EMAMMC
To  M AT,
Printer, etc.
Alarm Lamps on the TOPU
Thermal Reed Relay
RDY
Clock
etc.
Howler
Ringing
Circuit
Fault
InformationNotePWR Supply
Failure,
Fuse Blown
Firmware
    Fault
C-level
monitor
C-level
monitor
TSW/
INT
LC/TRK
MUX
TSWM1
TSW/
INTTSW/
INTTSW/
INT
LC/TRK
MUX
TSWM0
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
IOC
LANI
To TSW
of ISWMTo TSW
of ISWM
CPU
EMAMMC
To  M AT,
Printer, etc.
Alarm Lamps on the TOPU
Thermal Reed Relay
Howler
Ringing
Circuit
Fault
InformationNote
PWR Supply
Failure,
Fuse Blown
C-level
monitor
TSW/
INT
IOGT
HSW
ISWM
RDY
Clock
Write
etc.
RDY
Clock
Write
etc.
IOC
From 
other existing
Local Nodes
From 
other 
nodes
LANI
< LN >
< ISW > < LN >
      To MAT
on the Ethernet
: Circuit Card
: Main faults to be detected: Speech path
: Flow of fault information
CPU
EMA
MMC
TSW
INT
MUX
HSW
DLKC
PWR
LANI
IOC
GT
IOGT
LC/TRK
MAT
LN
TSWM
ISW
ISWM:Central Processing Unit
:Emergency Alarm Controller
:Man Machine Controller
:Time Division Switch
:Speech Path Control Interface
:Multiplexer
:Highway Switch
:Data Link Controller
:Power Supply
:Local Area Network Interface
:I/O Controller
:Gate
:Input/Output Gate
:Line/Trunk
:Maintenance Administration Terminal
:Local Node
:Time Division Switch Module
:Inter-node Switch
:Inter-node Switch Module -  Symbols - 
						

							CHAPTER 2 NDA-24307
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SYSTEM MAINTENANCE OUTLINE
(a) Main Faults
Faults that may occur in the system can be generally categorized into Processor System Fault, Speech
Path System Fault, Line/Trunk Fault, etc.
Processor System Fault
The CPU alarm detecting circuit continuously monitors whether the CPU is working normally. If
a fault is detected, the CPU calls up the diagnostic program, which identifies the cause of the fault
and determines whether the fault is temporary or permanent. When the fault affects system
operations, Active/Standby status of the CPU is changed over (provided that the system has dual
configuration).
Bus System Fault
The CPU transfers line/trunk card control information to the associated peripheral circuits via IO
Bus. When a parity error is detected in the transfer data or when the required information cannot
be transferred from a circuit card, the CPU identifies the cause of the fault, changes over the CPU
so that system operation is not affected, and executes restart processing.
Speech Path Fault
The CPU monitors the operating status of the TSW card, the occurrence of errors in writing data
to the switch memory, and the basic clocks supplied to the speech path. Upon detecting a fault, the
CPU identifies the cause of the fault, determines whether the fault is temporary or permanent, and
executes required processing such as changeover of the TSW card.
Others
The alarm detecting circuit on the EMA card continuously monitors the occurrence of faults in the
PWR supply cards, such as abnormal temperatures within the equipment frame, and lights the
alarm lamp on the TOPU when a fault is detected.
(b) Lamp Indications on the TOPU
When a fault occurs, the corresponding lamp on the TOPU indicates the location of the fault. For the
meaning of each lamp indication, refer to Chapter 6. 
						

							NDA-24307 CHAPTER 2
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SYSTEM MAINTENANCE OUTLINE
2.7 Range of Faults Specification
(1) Upon receiving a fault report from a station user or an operator, the technician can assume a faulty card
exists if the range to be affected by the fault can be determined. For the detailed procedure, refer to
Chapter 5. Use the following actions to check the MDF:
(a) Check the LENS of the reporter (Station or ATTCON/DESKCON).
(b) Check other circuits of the circuit card in which the reporter (station line or ATTCON/DESKCON)
is located.
(c) Check the other groups (other circuit cards mounted in the same module) in the module in which the
reporter is located.
(d) Check lines in each of the other modules on the basis of plural lines.
(2) If the fault cannot be detected by the system (a fault related to the speech path such as noise during speech,
one-way speech, speech inability), the range of (a) through (d) (itemized above) should be limited.
(3) When a major fault is detected in the dual systems, the CPU or TSW system automatically changes over
if the fault range is (c) and (d). In this case, the whole module involved is placed into make-busy status
even if the fault is partial, and the station lines currently operating normally become faulty status.
Diagnose the fault from the content of the system message displayed and repair the fault as required.
(4) When limiting the range of faults, consider the system circuitry that consists of the control (see Figure 2-
24 and Figure 2-25, where CPU 0 is active) and speech path systems (see Figure 2-26).
(5) As seen from the block diagrams in Figure 2-24 through Figure 2-27, if a fault occurs within the common
portions to be controlled, all other associated portions are affected by that fault occurrence. If the range
of faults is outside PIM fault, CPU/TSW system changeover is executed (only when the fault is detectable
by the system). 
						

							CHAPTER 2 NDA-24307
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SYSTEM MAINTENANCE OUTLINE
Figure 2-23   General System Block Diagram (1/2)
HSW
TSWM0TSWM1
TSWM0TSWM1
< ISW (Inter-node Switch) >
ISAGT:  PZ-GT13          LANI:  PZ-PC19                 IOGT:  PH-GT10          TSW:  PU-SW00
HSW:  PU-SW01           PLO:  PH-CK16/17-A         EMA:  PH-PC40           IOC:  PH-IO24
< LN (Local Node) >
ISAGT-A:  PZ-GT13       ISAGT-B:  PZ-GT20            LANI:  PZ-PC19          GT:  PH-GT09              TSW:  PH-SW12          MUX:  PH-PC36 
DLKC:  PH-PC20           PLO:  PH-CK16-A              CLK:  PH-CK18           EMA:  PH-PC40           IOC:  PH-IO24
MISCIOCEMA
PLO
MISCIOCEMA
MISCIOCEMA
PLO
GT
ISAGT-B
TSW00TSW01TSW02TSW03
TSW00TSW01TSW02TSW03
TSW00TSW01TSW02TSW03
IOGT
ISAGT
CPU
LANI
GT
ISAGT-A
CPULANI
Fusion Link
ISWLN0LN1
To PLO of
  LN2/3
DLKC
GT
ISAGT-A
GT
ISAGT-B
CPULANI
TSW00TSW01TSW02TSW03
DLKCPLOCLK
To MUX
(IMG0)To MUX
(IMG1)
To MUX
(IMG0)To MUX
(IMG1)To MUX
(IMG2)To MUX
(IMG3)
To MUX
(IMG2)To MUX
(IMG3)
CLK
Note 1
Note 3
Note 4
Note 4
Circuit Card 
(No. 0 System) 
Circuit Card 
(No. 1 System)
Note 1
HSW00, 01 for No. 0 System / 
HSW10, 11 for No. 1 System
Note 2
ISW-LN TSW CA-n Cables
Note 3
ISW-LN PLO CA-n Cables
Note 4
PLO-CLK CA-n Cables
:
:
TSW00TSW01TSW02TSW03
Note 2
To TSW
of LN2To TSW
of LN3
Note:For details on each equipment’s switching network, see Chapter 6, System Control
Procedures.