NEC Neax 2400 Imx System Operations And Maintenance Manual
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CHAPTER 5 NDA-24238
Page 382
Revision 3.0
FAULT REPAIR PROCEDURES
11.2 When Faulty Circuit Cards Can Be Assumed From System Message
Faulty Situation:
When the system is down with message [0-C] ~ [0-J] indicated, faulty circuit cards can be assumed from
the message detail data. Replace circuit cards with spares.
Replace faulty circuit card with a spare. Set MB switch UP and extract the circuit card
from its mounting slot.
Make necessary switch settings on the new
circuit card.
Set the MB switch UP...](http://img.usermanuals.tech/thumb/54/84348/w64_nec-neax2400-imx-system-operations-and-maintenance-manual_d-408.png "Page 409
CHAPTER 5 NDA-24238
Page 382
Revision 3.0
FAULT REPAIR PROCEDURES
11.2 When Faulty Circuit Cards Can Be Assumed From System Message
Faulty Situation:
When the system is down with message [0-C] ~ [0-J] indicated, faulty circuit cards can be assumed from
the message detail data. Replace circuit cards with spares.
Replace faulty circuit card with a spare. Set MB switch UP and extract the circuit card
from its mounting slot.
Make necessary switch settings on the new
circuit card.
Set the MB switch UP...")
CHAPTER 5 NDA-24238 Page 384 Revision 3.0 FAULT REPAIR PROCEDURES 12.3 Specific CCH/CCT Card Is Faulty Check by replacing CCH/CCT card with a spare.On CCH/CCT card, set the MBR switch UP. On CCH/CCT card, set MBR switch UP and extract the card from its mounting slot. Make switch settings on a new CCH/CCT card. On new CCH/CCT card, set MBR and MB switches UP and insert the card into its mounting slot. On new CCH/CCT card, set MB switch DOWN. On new CCH/CCT card, set MBR switch DOWN. Check whether the fault is still indicated. START END
NDA-24238 CHAPTER 5 Page 385 Revision 3.0 FAULT REPAIR PROCEDURES 12.4 Fault of CCH, DTI and Related Flat Cable Check connectors and flat cables between DTI and CCH.On DTI cards, set MB switch UP. On CCH card, set MBR switch UP. Check the connector. Check whether the connector is correctly con- nected or not. If the connection is found im- proper, plug and unplug the connector a few times. On DTI cards, set MB switch DOWN. On CCH card, set MBR switch DOWN. Check whether the fault is still indicated. Check the flat cable. On DTI cards, set MB switch UP. On CCH card, set MBR switch UP. Test the continuity of the flat cable. If found to be abnormal, replace the flat cable with a spare. On DTI cards, set MB switch DOWN. On CCH card, set MBR switch DOWN. Check whether the fault is still indicated. Check by replacing the DTI card with spare.On DTI card, set MB switch UP and extract the card from the mounting slot. On a new DTI card, make the switch setting. On new DTI card, set MB switch UP and insert the card into the mounting slot. On new DTI card, set MB switch DOWN. Check whether the fault is still indicated. START END
CHAPTER 5 NDA-24238 Page 386 Revision 3.0 FAULT REPAIR PROCEDURES 13. INTEGRATED SERVICE DIGITAL NETWORK (ISDN) LINE FAULT This section explains the fault repair procedure when any of the faults shown in Table 5-12 occur to a specific ISDN. 13.1 Check Point When repairing an ISDN Line fault, consider the following items: (1) Check alarm lamps on the DCH or PRT circuit card. (2) Refer to Figure 5-24, and check the cable connection. 13.2 ISDN Line Control The DCH/PRT circuit card controls the signal link (digital) of the ISDN line and transmits/receives call processing information. The signal link controls permit normal transmission and reception of call processing information. Figure 5-24 shows the ISDN line control route. Figure 5-24 Controlling ISDN Line Table 5-12 ISDN Line Fault Situation FAULTY SITUATION REFERENCE SECTION A specific CCH/CCT card is faulty.Section 13.3, Specific DCH/PRT Card Is Faulty When the signal transmission line is a digital line, transmitting/ receiving of control signals cannot be performed.Section 13.4, Fault of DCH, DTI, and Related Flat Cable CPUTSW MUX DCH PRT DTI LT Cable Front CableMDF To ISDN Line LT Cable
NDA-24238 CHAPTER 5 Page 387 Revision 3.0 FAULT REPAIR PROCEDURES 13.3 Specific DCH/PRT Card Is Faulty Check by replacing the DCH/PRT card with a spare.On DCH/PRT card, set MBR switch UP. On DCH/PRT card, set MB switch UP and extract the card from its mounting slot. Make switch setting on a new DCH/PRT card. On new DCH/PRT card, set MBR and MB switches UP and insert the card into its mounting slot. On new DCH/PRT card, set MB switch DOWN. On new DCH/PRT card, set MBR switch DOWN. Check whether the fault is still indicated. START END
CHAPTER 5 NDA-24238 Page 388 Revision 3.0 FAULT REPAIR PROCEDURES 13.4 Fault of DCH, DTI, and Related Flat Cable Check the connectors and flat cables between DTI and DCH. Check the connector. On DTI cards, set MB switch UP. On DCH card, set MBR switch UP. Check whether the connector is correctly connected. If the connection is found improper, plug and unplug the connector a few times. On DTI cards, set MB switch DOWN. On DCH card, set MBR switch DOWN. Check whether the fault is still indicated. Check the flat cable. On DTI cards, set MB switch UP. On DCH card, set MBR switch UP. Test the continuity of the flat cable. If abnormal, replace the flat cable with spare. On DTI cards, set MB switch DOWN. On DCH card, set MBR switch DOWN. Check whether the fault is still indicated. Check by replacing the DTI card with a spare.On DTI card, set MB switch UP and extract the card from the mounting slot. On a new DTI card, make switch setting. On new DTI card, set MB switch UP and insert the card into the mounting slot. On new DTI card, set MB switch DOWN. Check whether the fault is still indicated. START END
NDA-24238 CHAPTER 5 Page 389 Revision 3.0 FAULT REPAIR PROCEDURES 14. HARD TIME CLOCK FAULT This section explains the procedure for repairing a hard time clock failure which occurs within the EMA card. Replace the EMA card. If the EMA card is removed from the system while the system is in operation under the control of the CPU #1, the system will reset and stop all call processing. See Section 1.3.2, EMA Card Replacement Procedure, in Chapter 4, for detailed instructions.Replace the EMA card referring to Section 1.3.2, EMA Card Replacement Procedure, in Chapter 4. START END WA RN I NG
CHAPTER 5 NDA-24238 Page 390 Revision 3.0 This page is for your notes.
NDA-24238 CHAPTER 6 Page 391 Revision 3.0 SYSTEM OPERATIONS CHAPTER 6 SYSTEM OPERATIONS To maintain the system in a normal state, maintenance technicians need to monitor the servicing status of the system. Figure 6-1 shows the flow of the system status monitor. When trouble occurs in any part of the system or to any phase of system operations, maintenance technicians are alerted by an alarm indication or by a report from a station user or an operator. When the system becomes overloaded, maintenance technicians can execute Line Load Control. Figure 6-1 System Status Monitor 1. ALARM INDICATIONS When trouble occurs in the system, the system activates an appropriate remedial action (system changeover, make-busy shift of the circuit card, restart processing, etc.) by executing the automatic diagnostic function. Re- sults of the action taken and the faulty situation are displayed. 1.1 Kinds of Alarm Indications Figure 6-2 shows the kinds of alarm indications. Figure 6-2 Alarm Indications SYSTEM STATUS MONITOR 1. ALARM INDICATIONS Alarm Lamps on Circuit Card Alarm Lamps on TOPU Alarm Lamps on Attendant Console 2. COLLECTION OF SYSTEM MESSAGES 3. INDICATION OF LOCKOUT STATUS 4. LINE LOAD CONTROL ALARM INDICATION TROUBLE SYSTEM MESSAGETOPU CIRCUIT CARDS ATTENDANT/DESK CONSOLE MAT SYSTEM DEDICATED PRINTER
CHAPTER 6 NDA-24238
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SYSTEM OPERATIONS
1.2 How to Stop Alarm Indications
To stop the alarm indication, press ALM RST key on the TOPU or use the RALM command.
Note:If the RALM command is executed, the system messages that show the reason for the failure will be
cleared. Always print the indicated system message before using this command.
1.3 Alarm Indications on TOPU
The system has alarm lamps on the TOPU as shown in Figure 6-3. Ta b l e 6 - 1 lists the meaning of each
lamp.
Figure 6-3 Alarm Indications on TOPU
Table 6-1 Description of Alarm Indications on TOPU
LAMP COLOR FUNCTION CONTENTS
PWR ON Green Power ON Indication Lights when the power is turned ON to the LPR (EMA card
mounted)
ALM MJ Red Alarm urgency level
indicating lamps for each
IMGThe kind of lamp indications are programmable by variable alarm
indication. Refer to Section 1.4, Variable Alarm Indication.
ALM MN Red
ALM SUP Yellow
SMJ Red Alarm urgency level
indicating lamps for
IMG0Lights when any abnormal state is detected within the system
(System Alarm MJ/MN)
SMN Red
NECNEAX2400 IMXPWR
ONMJMNSUP
ALM
PRW SMJ SMN MJ MN SUP
ON
ALM
NDA-24238 CHAPTER 6 Page 393 Revision 3.0 SYSTEM OPERATIONS 1.4 Variable Alarm Indication This feature allows PBX users to make a flexible change of system message output grades which range 0 to 3 and alarm lamp grades which consist of MJ, MN, SUP and NONE. Thus, the PBX users can give a proper alarm grade to each system message according to their requirements. When assigning no data, the default alarm grades are automatically adopted. 2. COLLECTION OF SYSTEM MESSAGES System messages are collected in the following ways: Automatic printout to the system message dedicated printer Automatic printout to the MAT printer Printout by DFTD command 2.1 Automatic Printout to System Message Dedicated Printer Figure 6-4 shows the operating procedure. Figure 6-4 Automatic Printout to System Message Dedicated Printer Operating Procedure COMMAND COMMAND FULL NAME ALMGAssignment of Alarm Grade Data COMMAND COMMAND FULL NAME MBSMMake Busy of System Message Printout Power on to printer. Automatic Printout Status Is printout stopped temporarily?If a message is registered, the contents will Set printer port to Make-Busy status using MBSM command. YES NOprint out.