NEC Univerge SV8500 Operation And Maintenance Manual page 608

STEP 3 Turn ON (upward) the TSW MBR key on the TSW card of STBY side.
TSW ACT (TSW card) = lit (red)
MUX ACT (MUX card) = off
STEP 4 Turn ON (upward) the MB key on the TSW card.
• SYNC lamp (MUX card) = off
STEP 5 Turn ON (upward) the MB key on the MUX card to be replaced.
STEP 6 Disconnect the cable from the connector on the front panel of the MUX card to be replaced.
STEP 7 Extract the MUX card to be replaced from the PIR.
STEP 8 Turn ON (upward) the MB key on the new MUX card.
STEP 9 Set the keys on the new MUX card, referring to the card replaced. Note that MB must be set ON
(upward).
STEP 10 Insert the new MUX card into the PIR.
STEP 11 Connect the disconnected cable to the connector on the front panel of the new MUX card.
STEP 12 Turn OFF (downward) the MB key on the MUX card.
• PMCLKALM lamp (MUX card) = off
STEP 13 Turn OFF (downward) the MB key on the TSW card.
• ACT lamp (TSW card) = lit (red)
• SYNC lamp (MUX card) = lit (green)
STEP 14 Turn OFF (downward) the MBR key on the TSW card.
• all ACT lamps of STBY TSW card = off
STEP 15 Execute the TSW ACT/STBY changeover by using CMOD command and confirm the new
MUX card is operating normally.
[End]
CHAPTER 5 Operation Procedure for System with PIR
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