NEC Neax 2400 Ipx System Operations And Maintenance Manual

NDA-24307 CHAPTER 4
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
END Insert the MMC card into the LPM.
Set the MB key on the MMC card UP.
A
Set the MB key on the MMC card DOWN.
Connect the disconnected cable to the KEY
connector on the MMC card.
Connect the disconnected cable(s) to the
CNx connector(s) on the MMC card.
OPE lamp on the MMC card goes 
OFF.
OPE lamp on the MMC card lights a 
steady green. 

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2. TSWM ACCOMMODATING CIRCUIT CARD REPLACEMENT PROCEDURE
This section explains the procedure for replacing circuit cards mounted in the TSWM (TSWM0 in IMG1,
TSWM1 in IMG2).
2.1 Precautions
Use this procedure to replace a faulty circuit card with a spare or to check a spare card.
There are the functional switches (having set the default switch) on some of the circuit cards to be
replaced. As for switch setting on the circuit...

NDA-24307 CHAPTER 4
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2.3 Operating Procedures
The following paragraphs explain the operating procedures to replace unit/circuit cards located in the
TSWM. Perform the operations corresponding to each Reference Item specified in Table 4-2.
Table 4-2  TSWM Circuit Cards and Reference Items
CIRCUIT CARD 
FUNCTION NAMEREFERENCE ITEM REMARKS
GTSection 2.3.1, GT Card Replacement Procedure
TSWSection 2.3.2, TSW Card Replacement Procedure
DLKCSection 2.3.3,...

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2.3.1 GT Card Replacement Procedure
The GT (PH-GT09) card is mounted in Slot No. 10 or 11 within the TSWM0 and TSWM1. The card’s
main function is to provide both MISC and I/O Local bus interface between the microprocessor of
CPU and other lower echelons, such as DLKC, TSW and MUX cards. Follow the procedures below to
replace a GT card with a spare.
Note:To replace the GT card, the ACT/STBY status of GT must be changed over...

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GT Card Replacement Procedure
Use extreme care when operating the keys on the DSP of CPR and PH-GT09 card.
WAR NI NG
System Changeover of GT from 
ACT to STBY mode. 
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
Check the following lamp indications
on the GT card to be replaced and on
the DSP CPR that controls the GT:
OPE/MB (GT card) = OFF
CPU OPE (CPU DSP) = OFF
IMG0 (CPU DSP) = Flash (green)
IMG1-3...

CHAPTER 4 NDA-24307
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
ATTENTIONContents
Static Sensitive
Handling
Precautions Required
OPE/MB lamp on the GT card 
remains OFF.
OPE/MB lamp on the new card is 
OFF.
OPE/MB lamp on the new card 
remains OFF.
B
Set the MBR and MB keys on the new card UP.
A
Set the MB key on the new card DOWN.
Insert the new GT card into the TSWM.Extract the GT card to be replaced 
from the TSWM0/1.
Set the MBR Key on the new card DOWN.
On the GT card to be replaced,...

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EMA SUP lamp on the EMA card goes 
OFF.
System Changeover
Replaced GT: STBY to ACT
Mate GT: ACT to STBY
Check the following lamp indications on
the new GT card and the DSP of the CPR
which controls the GT.
OPE/MB (GT card) = Steady-green
CPU OPE (CPU DSP) = Steady-green
IMG0 (CPU DSP) = Flash (green)
IMG1-3 (CPU DSP) = Flash (green)
Note:IMG2-3 lamp indications may
vary depending on the system
configuration.
Check the...

CHAPTER 4 NDA-24307
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
2.3.2 TSW Card Replacement Procedure
The TSW (PH-SW12) card is mounted in the Slot Nos. ranging from 12 to 19 within the TSWM0/1.
Equipped with the Time Division Switch (TSW) and Speech Path Controlling Interface (INT), the
card’s main function is to provide the Time Slot (TS) switching for a specific IMG or to provide the
PCM data link with the ISW. If the TSW card is used in a dual configuration, the card’s replacement...

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Figure  4-12    Syste m Bloc k Diag ram (TSW and Ot her Speech  Path Echelo ns)
< ISW (Inter-node Switch) >
ISAGT:  PZ-GT13          LANI:  PZ-PC19                       IOGT:  PH-GT10          TSW:  PU-SW00
HSW:  PU-SW01            PLO:  PH-CK16-A/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:...

CHAPTER 4 NDA-24307
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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
TSW Card Replacement Procedure
Use extreme care when operating the keys on the circuit card.
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:
At the ISW:
TSW ACT (IOGT cards)
TSW ACT (TSW cards)
HSW ACT (HSW cards)
At the LN:
TSW ACT (TSW cards)
OPE/MB (DLKC card) Note
MUX...