User's Manual

CHAPTER 4 NDA-24300
Page 288
Issue 1
UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
Note:
The changeover of Speech Path System can be performed also by using the CMOD command. For
details, refer to Chapter 8, Maintenance Commands.
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
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 4-16 and Figure 4-17.
END
B
Flip the MBR key on the active GT card. Confirm the
new MUX card functions normally.
On the new MUX card, set the MB key DOWN.
Verify that the SYNC LED on the new card
lights green.
MBR (on the active GT card)
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