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)