UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

B

Verify that the SYNC LED on the new card lights green.

On the new MUX card, set the MB key DOWN.

Flip the MBR key on the active GT card. Confirm the new MUX card functions normally.

END

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

MBR (on the active GT card)

1 2

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 4-16and Figure 4-17.

Note: The changeover of Speech Path System can be performed also by using the CMOD command. For details, refer to Chapter 8, Maintenance Commands.

CHAPTER 4

NDA-24300

Page 288

Issue 1

Page 315
Image 315
NEC NDA-24300 manual Refer to -16and Figure