NEC Neax 2400 Imx System Operations And Maintenance Manual
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CHAPTER 4 NDA-24238 Page 284 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 3.3 Operating Procedures The following sections provide operating procedures to replace circuit cards mounted in the PIM. Perform the operations corresponding to each Reference Item specified in Table 4-3. Note that the procedures as- sume that the system adopts the dual configuration. Table 4-3 PIM Circuit Cards and Reference Items CIRCUIT CARD FUNCTION NAMEREFERENCE ITEM REMARKS LC/TRKSection 3.3.1, LC/TRK Circuit Card Replacement Procedure MUXSection 3.3.2, MUX Card Replacement Procedure SDTSection 3.3.3, SDT Card Replacement Procedure PWRSection 3.3.4, PWR Card Replacement Procedure
NDA-24238 CHAPTER 4 Page 285 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 3.3.1 LC/TRK Circuit Card Replacement Procedure ATTENTIONContents Static Sensitive Handling Precautions Required Keep MB switch set at UP. END START Extract the circuit card from its mounting slot. On the circuit card to be replaced, set the MB switch UP. Insert the new card into its mounting slot. On the new card, set MB switch DOWN.
CHAPTER 4 NDA-24238 Page 286 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 3.3.2 MUX Card Replacement Procedure The MUX (PH-PC36) card is mounted in Slot No. 13 and/or 14 of each Port Interface Module (PIM). The card’s main function is to provide an interface between the CPR and Port Microprocessor (PM) of the line/trunk circuit, and also to provide an interface for multiplexing/de-multiplexing of voice Pulse Code Modulation (PCM) information and digital data information. Use the procedures below to re- place the MUX card with a spare: Note:Execute the system changeover of MUX by using the MBR key operation on the active GT (PH-GT09) card or by using the CMOD command. Before starting this task, be sure to confirm the system block diagram shown in Figure 4-16, or Section 12, System Control Procedures, in Chapter 6. MUX Card Replacement Procedure Apply extreme care when operating the keys on the circuit cards. WA RN I NG ATTENTIONContents Static Sensitive Handling Precautions Required System Changeover Check the following lamp indications on the circuit cards to be affected and ensure that they are all OFF: TSW ACT (TSW cards) OPE/MB (DLKC card) Note MUX ACT (MUX cards) Note:If the MUX card to be replaced represents system status #0, all circuit cards with #0 status are totally affected. Check the cited cards’ lamp indications. Refer to Figure 4-16 and Figure 4-17. Check the following lamp indications on the mate Speech Path Block and en- sure that they are all steady-green: TSW ACT (TSW cards) OPE/MB (DLKC card) MUX ACT (MUX cards) MUX/ACT lamp on the DLKC card is red. A START On the active GT (PH-GT09) card, set the MBR key UP. Then, return the key DOWN. Check the mate GT blocks ACT mode. On the MUX (PH-PC36) card to be replaced, Set the MB switch UP.
NDA-24238 CHAPTER 4 Page 287 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE MUX ACT lamp on the new card is red. ATTENTIONContents Static Sensitive Handling Precautions Required B Insert the new card into the PIM. A On the new card, set the MB key UP. Extract card to be replaced from the mounted PIM. Disconnect the cable for the MUX front connector on the card to be replaced. Connect the disconnected cable to the MUX front connector on the new card.
CHAPTER 4 NDA-24238 Page 288 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE Note: The changeover of Speech Path System can be performed also by using the CMOD command. For details, refer to Chapter 8, Maintenance Commands. ATTENTIONContents Static Sensitive Handling Precautions Required System Changeover Replaced MUX: STBY to ACT Mate MUX: ACT to STBY Check all the following lamp indica- tions on the Speech Path block to which the new MUX card belongs and ensure that they are all steady- green: TSW ACT (TSW cards) OPE/MB (DLKC card) MUX ACT (MUX cards) Check the following lamp indications on the mate Speech Path block and ensure that they are all steady-green: TSW ACT (TSW cards) OPE/MB (DLKC card) MUX ACT (MUX cards) Refer to Figure 4-16 and Figure 4-17. END B Flip the MBR key on the active GT card. Confirm the new MUX card functions normally. On the new MUX card, set the MB key DOWN. Verify that the SYNC LED on the new card lights green. MBR (on the active GT card) 12
NDA-24238 CHAPTER 4 Page 289 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE 3.3.3 SDT Card Replacement Procedure The SDT (PA-SDTA/PA-SDTB) card, mounted in a universal slot of a PIM, is used to provide a 52M interface for the optical fiber lines. Use the following procedure to replace the SDT card with a spare. Procedure to Replace Optical Fiber Cable ATTENTIONContents Static Sensitive Handling Precautions Required ATTENTIONContents Static Sensitive Handling Precautions Required While this card is being replaced, the connected optical fiber line cannot be used.WA R N I N G ACT lamp on PA-SDTA card goes OFF. (When card is provided in a dual configuration, the card becomes STBY.) The following occurs in call processing: When card is provided in dual configuration All calls (including already established calls plus newly attempted calls) can normally be handled by the mate card. When card is in single configuration, or mate card is faulty in dual configu- ration Though any call attempt is rejected, al- ready established calls are not affected. When any connection link exists, the link is still maintained. OPE lamp on the PA-SDTA card is red. The following occurs in call processing: When card is in single configuration, or mate card is faulty in dual configuration Already established calls (while in speech) lose voice/tone. Any connec- tion link is severed after a few seconds. ATTENTIONContents Static Sensitive Handling Precautions Required A START On the PA-SDTA card, turn ON Switch 4 of the P-SW key. On the PA-SDTA card, set the MB key UP (=ON).
CHAPTER 4 NDA-24238 Page 290 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE ATTENTIONContents Static Sensitive Handling Precautions Required OPE lamp on the PA-SDTA card is steady-green. END A Remove the optical fiber cable from the front connector on the PA-SDTA card. Connect the new optical fiber cable to the front connector on the PA-SDTA card. On the PA-SDTA card, set the MB key DOWN (=OFF) and turn OFF Switch 4 of the P-SW key.
NDA-24238 CHAPTER 4 Page 291 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE Procedure to Replace PA-SDTA/PA-SDTB card ATTENTIONContents Static Sensitive Handling Precautions Required ACT lamp on the PA-SDTA card goes OFF. Though any call attempt is rejected, already established calls are safely maintained. When any connection link exists, the link is maintained. Note:When the card is in a dual configuration, perform this for both system sides, in the order of STBY → ACT. OPE lamp on the PA-SDTA card is red. When already established calls exist, the connections lose voice/tone. When any connection link exists, the link is severed after a few seconds. Note:When the card is in a dual configuration, perform this for both system sides (both ACT and STBY sides). A START On the PA-SDTA card, turn ON Switch 4 of the P-SW key. On the PA-SDTA card, set the MB key UP (=ON). By using the SPTS command, verify that no calls are being handled by the SDT card.
CHAPTER 4 NDA-24238 Page 292 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE ATTENTIONContents Static Sensitive Handling Precautions Required OPE lamp on the PA-SDTB card is red. When any connection link exists, the nailed-down connection between the FCH (PA-FCHA) and SDT (PA- SDTB) cards is cut off. Already established calls, while in speech, are all disconnected. Confirm that the MB key on the new card is set UP (=ON). If the new card is PA-SDTA, also confirm that Switch 4 of the P-SW key is ON. B A Referring to the card removed, perform the switch settings on the new card. On the PA-SDTB card, set the MB key UP (=ON). Remove the flat cables from the front connectors, I/O and PCM, on both PA-SDTB and PA-SDTA cards. When replacing the PA-SDTB, also remove MT24 TSW cables from all the front connectors on the card. Extract both PA-SDTA/PA-SDTB cards, simultaneously.
NDA-24238 CHAPTER 4 Page 293 Revision 3.0 UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE ATTENTIONContents Static Sensitive Handling Precautions Required OPE lamp on the new card is red. OPE lamp on the new card is steady- green. END B On the PA-SDTA card, turn OFF Switch 4 of the P-SW key. Note 2 Insert both PA-SDTA/PA-SDTB cards (including new card) simultaneously into the same slots of the PIM. When the new card is PA-SDTB, also connect the MT 24 TSW cables to all the required front connectors. On the PA-SDTB card, set the MB key DOWN (=OFF). On the PA-SDTA card, set the MB key DOWN (=OFF). Connect the disconnected flat cables to the connectors on the new card and other PA-SDTA/PA-SDTB cards. Note 1: When the card is in a dual configuration, perform this action for both system sides (both ACT and STBY sides). Note 2:When the card is in a dual configuration, perform this action for both system sides, in the order of STBY → ACT. Note 1