NEC NDA-24300 manual SDT Card Replacement Procedure, Procedure to Replace Optical Fiber Cable

UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

3.3.3SDT 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.

ATTENTION

Contents Static Sensitive

Handling Precautions Required

WARNING

While this card is being replaced, the connected optical fiber line cannot be used.

Procedure to Replace Optical Fiber Cable

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).

A

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

•ACT lamp onPA-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.

NDA-24300CHAPTER 4

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