NEC NDA-24300 manual UNIT/CIRCUIT Card Replacement Procedure

Models: NDA-24300

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UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

A

On the PA-SDTB card, set the MB key UP (=ON).

Extract both PA-SDTA/PA-SDTB cards, simultaneously.

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.

Referring to the card removed, perform the switch settings on the new card.

B

ATTENTION

Contents

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.

CHAPTER 4

NDA-24300

Page 292

Issue 1

Page 319
Image 319
NEC NDA-24300 manual UNIT/CIRCUIT Card Replacement Procedure