Circuit card replacement (MSS)

All circuit cards in an MSS can be replaced on site. The system must be powered down for you to replace or add a circuit card.

Note: This procedure can also be used to reseat a card (for example, to determine if a board is faulty or was simply loose).

Replacing MSS circuit cards

To replace a circuit card in an MSS-S or MSS-H:

1. Verify that the replacement equipment is on site and appears to be in usable condition, with no obvious shipping damage.
2. Remove the old circuit card.
3. Install the new circuit card.
4. Verify new card operation.

Remove the old circuit card

To remove a faulty circuit card:

1. Shut down the system and unplug the AC power cords.
2. Remove the front bezel and top cover.
3. Remove the circuit card hold-down bracket.
4. Locate the circuit card that you want to reseat or replace:
• MSS-S: See figure MSS standard configuration (back view).
  • Remote maintenance board (RMB)
  • Nonintegrated video and LAN model only:
    • Video card (closest to the power supply)
    • Network interface card (NIC)
• MSS-H: See figure MSS high-availability configuration (back view).
  • SCSI RAID controller card
  • Remote maintenance board (RMB)
  • Nonintegrated video and LAN model only:
    • Video card (closest to the power supply)
    • Network interface card (NIC)
5. Remove any exterior cables connected to the circuit card you want to replace. These include:
   • RMB modem and COM cables
   • Nonintegrated video and LAN model only:
     • Video card monitor cable
     • NIC LAN cable

Note: Label the cables so that you can easily reconnect them. See Chapter 2 of the Installation guide (pdf) for cabling diagrams if needed.

6. Remove any interior cables connected to the circuit card you want to replace:
   • RMB ribbon cable to the fans, power supply, and reset switch. See figure Replacing the RMB ribbon cable.
   • MSS-H: SCSI RAID controller ribbon cable and SCSI LED cable. See figure Replacing the SCSI RAID controller cable (MSS-H).
7. Unscrew the retaining screw that attaches the circuit card to the chassis. Set it aside.
8. Lift the circuit card out. See figure Replacing a circuit card.

   Note: To remove the video card, you must release the safety catch at the rear of the board before you can lift it out.

Install the new circuit card

To install a new circuit card:

1. Slide the card edge connector into the slot connector and the card slot retainer bracket into the slot guide. Apply pressure to the top of the card only, until the edge connector is firmly seated. See figure Replacing a circuit card.

   Note: To install a video card, hold open the safety catch until the card is seated, and then release it to lock the board in place.

2. Replace and tighten the retaining screw to hold the circuit card in place.
3. Reattach any interior cables.
• For the RMB, reconnect the ribbon cable to the 10-pin connector near the top rear of the board. See figure Replacing the RMB ribbon cable.
• For a SCSI RAID controller card: See figure Replacing the SCSI RAID controller cable (MSS-H).
  1. Reconnect the ribbon cable to the upper edge connector near the SCSI card faceplate.
  2. Reconnect the SCSI LED cable to the 2 pins closest to the faceplate on the 8-pin connector near the upper edge of the SCSI board.
4. Reattach any exterior cables. See Chapter 2 of the Installation guide (pdf) for cabling diagrams if needed.

Note: For a rack-mount configuration, you might have to slide the machine back into the cabinet to get enough slack to plug in the exterior cables.

5. Replace the circuit card hold-down bracket.
6. Replace the top cover and front bezel.
7. Restore power to the system.

Verify new circuit card operation

To verify that the new circuit card is working:

1. If you replaced one of the following cards, perform the verification checks as noted:
   • RMB card:
     • After the system boots, test RMB functionality (for example, call in to the board, and run standard inquiries).
     • See Remote Maintenance Board (RMB) CYN23AP and CYN24AP PCI Version Release 1.0 Reference (585-310-263, 2 MB pdf) for more information. This document is available through the Avaya Support Web site under Technical Database > Messaging > Modular Messaging.
   • MSS-H: SCSI RAID controller card:
     • After the system boots, verify that the application software loads correctly.
   • NIC LAN card: After restoring power to the system:
     • Ping the address of the new card through the network.
     • Verify that the new card is present and answering.
   • Video card: After the system boots:
     • Bring up a GUI application, such as the Web interface to this product.
     • Verify that the application displays correctly.
2. Verify that the circuit pack alarms are resolved. See Alarms for more information.

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