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NEC Neax 2400 Imx System Operations And Maintenance Manual

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    							CHAPTER 6 NDA-24238
    Page 464
    Revision 3.0
    SYSTEM OPERATIONS
    (2) Check the mate CPU’s STBY mode. Also check the mate GT’s STBY mode. Refer to Fig-
    ure 6-43 and Figure 6-44.
    STEP 2 Flip the MBR key on the DSP of the active CPU. Refer to Figure 6-45.
    Figure 6-45   CPU Changeover via MBR Key 
    Note:
    If the MBR key remains in the UP position, the CPU stays in its make-busy status. Be sure to return the
    key to the DOWN position except in the case of a special purpose.
    STEP 3 Confirm the changed lamp indications.
    To confirm the CPU changeover, check the lamps in Figure 6-46 on both DSPs. LED indica-
    tions must change as shown when the CPU system has been correctly changed over.
    Figure 6-46   LED Indications Before and After CPU Changeover
    STEP 4 Analyze the displayed system messages.
    After STEPs 1 through 3 are performed, the system messages [7-C] and [7-D] automatically
    display. Confirm that no errors occurred during the CPU changeover process.
    Note:When the CPU mode change executes, the MAT (TCP/IP) is once disconnected. Then, log in to the sys-
    tem again.The system changeover of CPU can be done only when the mate CPU is in STBY mode. Do
    not attempt the changeover if the mate CPU is closed.
    WAR NI NG
    After the above steps, set the MBR key as shown below.
    The system changeover starts automatically.
    12
    34
    567
    8
    OFF
    12
    34
    567
    8
    OFF
    12
    34
    OFF
    4C026AE
    12
    DSP (Active)
    STATUS 
    ATTENTIONContents
    Static Sensitive
    Handling
    Precautions Required
    CPU Formerly Active After Changeover
    CPU Formerly in STBY ModeCPU OPE
    IMG0
    IMG1-3
    MB/OPE (GT Card)   
    After ChangeoverOFF
    Flash (green)
    OFF
    OFF : Steady-ON (green)
    : Flash (green)
    : Flash (green)
    : Steady-ON (green)
    CPU OPE
    IMG0
    IMG1-3
    MB/OPE (GT Card)   Steady-ON (green)
    Steady-ON (green)
    Flash (green)
    Steady-ON (green) : OFF
    : Flash (green)
    : OFF
    : OFF 
    						
    							NDA-24238 CHAPTER 6
    Page 465
    Revision 3.0
    SYSTEM OPERATIONS
    12.1.4 Forced Changeover of CPU
    Figure 6-47 shows how to perform the forced changeover of CPU by key oper-
    ation on the EMA (PH-PC40) card. Because the key operation will cause the en-
    tire system to initialize, do not rely on this method except as a last resort.
    Figure 6-47   Forced CPU Changeover
    ATTENTIONContents
    Static Sensitive
    Handling
    Precautions Required
    12
    34
    567
    8
    OFF
    12
    34
    567
    8
    OFF
    12
    34
    OFF
    MBR
    FDD ON
    OFF
    ON
    OFF OUT PWR
    IN PWR5AHDD SW
    MB
    SYSTEM SELECT0
    SENSE SYSTEM SELECT1
    SYSTEM SELECT2
    CPURST
    SLOT No.    0 1 2 3 4 5 6 STATUS IMG1 IMG2 IMG3 CPUOPE
    WDTIMG0
    ON
    ON
    ON4C026AE
    12
    34
    567
    8
    OFF
    12
    34
    567
    8
    OFF
    12
    34
    OFF
    MBR
    FDD ON
    OFF
    ON
    OFF OUT PWR
    IN PWR5AHDD SW
    MB
    SYSTEM SELECT0
    SENSE SYSTEM SELECT1
    SYSTEM SELECT2
    CPURST
    SLOT No.    0 1 2 3 4 5 6 STATUS IMG1 IMG2 IMG3 CPUOPE
    WDTIMG0
    ON
    ON
    ON4C026AE
    00 01 02 03 04
    MISC MISC/IOC IOC(PH-IO24) EMA(PH-PC40)MISC
    LPM
    CPR
    LANI(PZ-PC19)ISAGT(PZ-GT13)
    For the forced system changeover, set the CPU-SEL
    switch from middle to Up or Down. Note this operation
    also leads to system initialization.
    1) UP
    2) MIDDLE
    3) DOWN
    For more information, see the Circuit Card Manual.: The CPU#1 is placed into the ACT-side.
    : Normal setting for dual CPU configuration.
    : The CPU#0 is placed into the ACT-side.
      (This setting is mandatory for single CPU
       system.)
    UP
    MIDDLE
    DOWN
    CPU-SEL KeySW A0
    SW92 SW73
    SW70
    SW62
    SW65
    OPE/MB
          MB
    
    ACT1
    CKERR1
    ACT0
    CKERR0
    
     EMASUP
    EMASUP
    CPU SEL
    
    
    NMI SELCPU-SEL
    EMA(PH-PC40) FACE LAYOUT 
    						
    							CHAPTER 6 NDA-24238
    Page 466
    Revision 3.0
    SYSTEM OPERATIONS
    12.1.5 How to Control Switching Block
    The Switching Block denoted here includes the following system equipment:
     TSW (PH-SW12)
     MUX (PH-PC36)
     DLKC (PH-PC20)
     PLO (PH-CK16/17/16-A/17-A)
    Perform the required system changeover by using the CMOD command or by operating the relevant
    key on the GT/PLO card. Refer to Table 6-9.
    Note:These operations cause a momentary interruption in speech paths. Since the interruption is momentary,
    it can be ignored as far as ordinary telephone calls are concerned. However, care should be take when
    data communications are involved, as the interruption might cause bit errors.
    Table 6-9  Changeover of Switching Block
    Type Operations Remarks
    Speech Path Changeover by the 
    CMOD command
    Note
    Use CMOD command.
    See Chapter 8.All OPE or ACT lamps on the 
    Speech Path System, which were 
    formerly active, go OFF.
    All OPE or ACT lamps on the 
    Speech Path System, which were 
    formerly STBY, light steady-
    green.
    Speech Path System Changeover by 
    Key Operation on the active GT card
    Note
    On active GT card, turn MBR key UP.
    Return MBR key to original position (DOWN) 
    after OPE/MB lamp goes OFF on GT card.
    See Section 12.1.6, Manual System Changeover 
    of Speech Path System.All OPE or ACT lamps on the 
    Speech Path System, which were 
    formerly active, go OFF.
    All OPE or ACT lamps on the 
    other side Speech Path System, 
    light steady-green.
    PLO Changeover by Key Operation
    Note
    On active PLO card, turn MBR key UP.
    Return MB key to original position (DOWN) 
    after ACT lamp goes OFF on PLO card.
    See Section 12.1.7, Manual System Changeover 
    of PLO.ACT lamp on the PLO card, which 
    was formerly active, goes OFF.
    ACT lamp on the PLO card, which 
    was formerly STBY, goes steady-
    green.
    ATTENTIONContents
    Static Sensitive
    Handling
    Precautions Required 
    						
    							NDA-24238 CHAPTER 6
    Page 467
    Revision 3.0
    SYSTEM OPERATIONS
    12.1.6 Manual System Changeover of Speech Path System
    To changeover the ACT/STBY of Speech Path System, the CMOD command is normally used. How-
    ever, if for some reason the command cannot be used, use the key operations listed below.
    Note 1:As explained in this section, the ACT/STBY of the Speech Path System can be changed over via the
    MBR key on the GT (PH-GT09) card. Because each GT (GT0 and GT1) can control both the Speech
    Path System #0 an #1, perform the key operation on the active GT card, not on the card in STBY mode.
    Refer to Figure 6-48.
    Note 2:Figure 6-48 shows a system block diagram centering upon the GT and its controlling Speech Path Sys-
    tem. By changing over the ACT/STBY of Speech Path System, all the related systems, such as TDSW/
    INT, DLKC, and MUX, are totally switched over. The changeover can be executed by a key operation
    on the active GT card. If the MBR key is flipped on the active GT card, all the Speech Path-related
    systems (TSW/INT, DLKC, and MUX) in the same switching block are totally changed over. However,
    the ACT/STBY of GT and PLO is not affected. 
    						
    							CHAPTER 6 NDA-24238
    Page 468
    Revision 3.0
    SYSTEM OPERATIONS
    Figure 6-48   System Block Diagram (Switching Network for Speech Path System)
    IMG0
    TSW I/O BUS
    TSW I/O BUS
    CPR 0CPR 1
    TSW 00
    GT 0
    GT 1
    CPU 1
    TSW 10
    TSW 01
    TSW 11
    TSW 02
    TSW 12
    TSW 03
    TSW 13
    DLKC 1DLKC 0PLO 1
    PLO 0
    ISAGT
    LANILANI
    ISAGT
    LANILANI
    ISAGT: PZ-GT13 LANI:  PZ-PC19 GT:   PH-GT09 TSW: PH-SW12 MUX:  PH-PC36
    DLKC:  PH-PC20 PLO:  PH-CK16/17/16-A/17-A
    CPU 0
    PCM HWPM BUSPCM HWPM BUSPCM HWPM BUSPCM HWPM BUS
    MUXMUXMUXMUX Line/Trunk PMIMG1
    PCM HWPM BUSPCM HWPM BUSPCM HWPM BUSPCM HWPM BUS
    MUXMUXMUXMUX Line/Trunk PMIMG2
    PCM HWPM BUSPCM HWPM BUSPCM HWPM BUSPCM HWPM BUS
    MUXMUXMUXMUX Line/Trunk PMIMG3
    PCM HWPM BUSPCM HWPM BUSPCM HWPM BUSPCM HWPM BUS
    MUXMUXMUXMUX Line/Trunk PM 
    						
    							NDA-24238 CHAPTER 6
    Page 469
    Revision 3.0
    SYSTEM OPERATIONS
    STEP 1 Make sure the active Speech Path System.
    (1) Check all the lamp indications in Figure 6-49, which are in the same switching block.
    Figure 6-49   TSW/DLKC/MUX in ACT Mode
    Note:
    Because this 4-IMG uses multiple TSW and MUX cards, be sure to check all the circuit cards concerned,
    which are in the same Switching Block. For example, if your system adopts the fully expanded system,
    you must check a total of 4 TSW cards and a total of 16 MUX cards in this step.
    (2) Make sure the STBY mode of mate Speech Path System. Check all the lamp indications in
    Figure 6-50, which are in the same Switching Block.
     
    Figure 6-50   TSW/DLKC/MUX in STBY Mode
     MUX: Active
    MUX (PH-PC36)
    green
     TSW: Active
    TSW (PH-SW12)
    green
     DLKC: Active
    DLKC (PH-PC20)
    green
    Legend
    Lamp is ON :
    Lamp is ON :FRONT VIEW
    MUX ACT
    MBMB
    TSW MBR TSW ACT
    OPE/MB
    MB
    The ACT/STBY of Speech Path System can be changed over only when the mate system is
    in STBY mode. Do not attempt the changeover if the mate Speech Path System is closed.WARNING
     MUX: ST-BY
    MUX (PH-PC36)
     TSW: ST-BY
    TSW (PH-SW12)
     DLKC: ST-BY
    DLKC (PH-PC20)
    Legend
    Lamp is OFF :
    Lamp is OFF:FRONT VIEW
    MUX ACT
    MBMB
    TSW MBR TSW ACT
    OPE/MB
    MB 
    						
    							CHAPTER 6 NDA-24238
    Page 470
    Revision 3.0
    SYSTEM OPERATIONS
    Note:
    Because this 4-IMG uses multiple TSW and MUX cards, be sure to check all the circuit cards concerned,
    which are in the same Switching Block. For example, if your system adopts the fully expanded system,
    you must check a total of 4 TSW cards and a total of 16 MUX cards in this step.
    STEP 2 Flip the MBR key on the active GT card. Refer to Figure 6-51.
    Figure 6-51   Speech Path System Changeover via Active GT MBR Key
    Note:
    If the MBR and MB keys are turned ON (UP), the GT card is forcibly placed in a make-busy status.
    Therefore, do not operate the MB key by mistake. Also, after the MBR key is flipped, be sure to return
    the key to the original position (DOWN).
    STEP 3 Confirm the changed lamp indications.
    (1) To confirm the imposed Speech Path System changeover, check all the lamps on the cards
    shown in Figure 6-52, which are in the relevant switching blocks.
    Figure 6-52   LED Indications Before and After Speech Path System Changeover
    Improper key operations may result in a system down. Operate the related keys, using extreme
    care.WARNING
    After STEP 1 and STEP 1.5 are taken, set the MBR key 
    as shown below. The system changeover starts automatically.
    12
    GT (Active)
    ATTENTIONContents
    Static Sensitive
    Handling
    Precautions RequiredMBMBR OPE/MB
    Steady-green
    Switching Block Formerly Active After Changeover
    Switching Block Formerly STBY TSW ACT
    OPE/MB (DLKC)
    MUX ACT
    After ChangeoverOFF
    OFF
    OFF : Steady-ON (green)
    : Steady-ON (green)
    : Steady-ON (green)
    TSW ACT
    OPE/MB (DLKC)
    MUX ACTSteady-ON (green)
    Steady-ON (green)
    Steady-ON (green) : OFF
    : OFF
    : OFF 
    						
    							NDA-24238 CHAPTER 6
    Page 471
    Revision 3.0
    SYSTEM OPERATIONS
    (2) If the system uses PH-CK16 or PH-CK17 as the PLO, make sure the active PLO and the
    newly activated TSW systems are in the same Switching Block. Refer to Figure 6-53.
    Because this card’s MUSIC ROM supplies hold tones only to the TSW cards that are in
    the same Switching Block, be sure to check the active PLO and the newly activated TSW
    systems are all in the same Switching Block. If not, perform the PLO changeover, referring
    to Section 12.1.7, Manual System Changeover of PLO.
    Note:If the system has PH-CK16-A/PH-CK17-A card, this step is not required.
    Figure 6-53   Check of Active PLO
    STEP 4 Analyze the displayed system messages.
    After STEPs 1 through 3 are performed, the system messages [7-E], [7-F], and [1-T] will au-
    tomatically display. Confirm that no errors occurred during the Speech Path System
    changeover process.
    : Lamp is ON               : Lamp is OFF
    PH-CK16/17 (Front View)
    Legend PLO: ST-BY
    MB
    PLO (PH-CK16/17)
    ACT
     PLO: Active
    MB
    ACT
    PLO (PH-CK16/17)
    green 
    						
    							CHAPTER 6 NDA-24238
    Page 472
    Revision 3.0
    SYSTEM OPERATIONS
    12.1.7 Manual System Changeover of PLO
    To change over the system of Phase Lock Oscillator (PLO), use the key operations listed below.
    Note:Though the PLO belongs to the Switching Block as explained in Section 12.1.5, its ACT/STBY Switching
    Network is separate from that of the Speech Path System. Therefore, the changeover of the PLO must
    be independently performed.
    STEP 1 Make sure the PLO system is active.
    (1) When the PLO system is active, ACT or OPE lamp on the PLO card lights green. If the
    LED is OFF, the system is STBY mode.
    (2) Check the mate PLO’s STBY mode. Refer to Figure 6-54.
    Figure 6-54   PLO in ACT/STBY Mode
    Improper key operations may result in a system down. Operate the related keys, using extreme
    care.WAR NI NG
    The changeover of PLO system can be done only when the mate PLO is in STBY mode. Do
    not attempt the changeover if the mate PLO is closed.WAR NI N G
    PLO (Front View)
     PLO: Active  PLO: STBY
    MB
    PLO
    green
    
    MB
    Legend
    Lamp is ON
    :Lamp is OFF:
    ACT/OPE   NoteACT/OPE   Note
    PH-CK16
    PH-CK17
    PH-CK16-A
    PH-CK17-A
    PLO
    PH-CK16
    PH-CK17
    PH-CK16-A
    PH-CK17-A
    Note:ACT lamp for PH-CK16/PH-CK17, OPE lamp for PH-CK16-A/PH-CK17-A. 
    						
    							NDA-24238 CHAPTER 6
    Page 473
    Revision 3.0
    SYSTEM OPERATIONS
    STEP 2 Flip the MB key on the PLO card. Refer to Figure 6-55.
    Figure 6-55   PLO Changeover via MB Key 
    Note:
    If the MB key remains in the UP position, the PLO system also stays in its make-busy status. Be sure to
    return the key DOWN except in the case of a special purpose.
    STEP 3 Confirm the changed lamp indications.
    (1) To confirm the imposed PLO changeover, check the following lamps on both PLO cards.
    The LED indications must change as shown in Figure 6-56when the PLO system has been
    correctly changed over.
    Figure 6-56   LED Indications Before and After PLO Changeover
    (2) If your system uses PH-CK16/PH-CK17, make sure the active TSW cards and the newly
    activated PLO are in the same switching block.
    Because this card’s MUSIC ROM does not supply hold tones to the TSW cards which are
    in different Switching Blocks, make sure the newly activated PLO and currently active
    TSW cards are both in the same Switching Block. If not, perform the Speech Path System
    changeover, referring to Section 12.1.6.
    Note:If the system uses PH-CK16-A/PH-CK17-A, this step is not required.
    After the above steps, set the MB key as shown below.
    Then, the system changeover starts automatically.
    12
    PLO: Active MB key
    ATTENTIONContents
    Static Sensitive
    Handling
    Precautions Required
    
    MB ACT
    PLO Formerly Active After Changeover
    PLO Formerly in STBY Mode After Changeover
    ACT/OPE:  Steady-ON (green)
    OFF
    ACT/OPE:       OFF
    Steady-ON (green) 
    						
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