NEC SV8500, Operation And Maintenance Manual

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CHAPTER 5 Operation Procedure for System with PIR
1.3 Replacement Procedure of SDT Card and Optical Fiber Cable
This section explains how to replace SDT (PA-SDTA/PA-SDTB) card and the optical
fiber cables that are connected to SDT card.
1.3.1 How to Replace SDT (PS-SDTA/PA-SDTB)
[Start]
STEP 1 Set P-SW key - 4 (MBR) to ON position on the PA-SDTA card to be replaced.
When the card is provided in dual configuration, do this for both cards in the order of STBY - ACT.
• ACT lamp goes OFF.
• New call attempt will be rejected. However, already established calls can be maintained.
• When having connection link, it will be left connected.
STEP 2 Use SPTS command to see if there is any active call on the card.
When it is found, wait a while, and try again until the card has no active call.
STEP 3 Turn ON (upward) MB key on the PA-SDTA card.
When the card is provided in dual configuration, do this for both cards in the order of STBY - ACT.
• OPE lamp changes color to red.
• Active calls will be placed in no-tone-state.
• When having connection link, it will be dropped in a few seconds.
STEP 4 Turn ON (upward) MB key on the PA-SDTB card.
• OPE lamp changes color to red.
• Active calls on the card will be disconnected.
• When having connection link, Nailed-down connection between FCH (PA-FCH) and SDT (PA-
SDTB) will be disconnected.
STEP 5 Disconnect MT24 from the PA-SDTB circuit card. Remove the flat cables from the front con-
nectors, I/O and PCM, on both PA-SDTA and PA-SDTB cards.
STEP 6 Remove the PA-SDTA and PA-SDTB.
STEP 7 Referring to the removed cards, perform the switch settings on the new cards.
STEP 8 Make sure that MB key on the new card is set to UP position. Set Switch 4 of P-SW key must
be set to ON position for PA-SDTA.
STEP 9 Insert the new PA-SDTA and PA-SDTB to the slots of the PIR.
• OPE lamp lights red on the new cards.
STEP 10 Connect the disconnected flat cables to the connectors on the new card and other PA-SDTA/PA-
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required