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NDA-24300 CHAPTER 6
Page 473
Issue 1
SYSTEM OPERATIONS
STEP 2 Flip the MB key on the PLO card. Refer to Figure 6-55.
Figure 6-55 PLO Changeover via MB Key
Note:
If the MB key remains in the UP position, the PLO system also stays in its make-busy status. Be sure to
return the key DOWN except in the case of a special purpose.
STEP 3 Confirm the changed lamp indications.
(1) To confirm the imposed PLO changeover, check the following lamps on both PLO cards.
The LED indications must change as shown in Figure 6-56when the PLO system has been
correctly changed over.
Figure 6-56 LED Indications Before and After PLO Changeover
(2) If your system uses PH-CK16/PH-CK17, make sure the active TSW cards and the newly
activated PLO are in the same switching block.
Because this card’s MUSIC ROM does not supply hold tones to the TSW cards which are
in different Switching Blocks, make sure the newly activated PLO and currently active
TSW cards are both in the same Switching Block. If not, perform the Speech Path System
changeover, referring to Section 12.1.6.
Note:
If the system uses PH-CK16-A/PH-CK17-A, this step is not required.
After the above steps, set the MB key as shown below.
Then, the system changeover starts automatically.
1 2
PLO: ActiveMB key
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
MB
ACT
PLO Formerly Active After Changeover
PLO Formerly in STBY Mode After Changeover
ACT/OPE: Steady-ON (green)
OFF
ACT/OPE: OFF
Steady-ON (green)