Circuit card replacement (MAS)

All circuit cards in an MAS can be replaced on site. You can also add port boards to an MAS if needed to support additional traffic. 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 or adding circuit cards

To replace or add a circuit card in an MAS:

1. Verify that the replacement equipment is on site and appears to be in usable condition, with no obvious shipping damage.
2. Verify that the replacement circuit card is of the same type as the card you are replacing.

   Caution! If you are adding or replacing a Dialogic port board, verify that the new card is of the same type as any port boards already installed in the MAS. You cannot mix board types (such as analog boards with DSE or T1/E1) in the same MAS.

3. Remove the old circuit card.
4. Set jumpers and switches (Dialogic port boards only).
5. Install the new circuit card.
6. 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 you want to reseat or replace. See figure Messaging Application Server (back view).
• Up to 5 port boards might be present, depending on the type of motherboard and port boards used. These include:
  • Digital Set Emulation (DSE) switch integration card
  • Analog port board (4-port and 12-port versions support tip/ring or fax capability)
  • T1 or E1 boards (support high-line capacities for QSIG switch integration)

  Note: Not all MASs have port boards installed.

• 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:
   • Any port board line 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, such as the Computer Telephony (CT) bus cable used for connecting multiple port boards. See figure Messaging Application Server (internal view).
7. Unscrew the retaining screw that attaches the circuit card to the chassis. Set it aside.
8. Lift the circuit card out.

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

Set jumpers and switches on Dialogic port boards

For Dialogic port boards, you must set jumpers and switches on the port board circuit pack for board position, bus termination, and other features:

1. Remove the new port board from its packaging.
2. Set the jumpers and switches as required for this type of board:
• D/120JCT-LS or D/41JCT-LS analog boards
• D/82JCT-U set emulation boards
• D/480JCT-2T1 QSIG or D/600JCT-2E1 QSIG boards

Note: If you are replacing an existing card, verify any settings on the new card by comparing it with the old card.

3. Install the new card as follows:
   • If you are replacing an existing card, install the replacement card in the same slot from which you removed the old card.
   • If you are adding a new card, install the card in the next available PCI slot. Port boards should be added in the PCI slots starting from the outer edge of the chassis towards the center of the MAS.

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 or adding 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. For an MAS that has multiple port boards installed, connect the port boards using the Computer Telephony (CT) bus cable. The CT bus cable varies depending on the type of motherboard in the MAS. See figure Replacing or adding a circuit card.
   To attach the bus cable:
   1. Position the CT bus cable so that the colored stripe on the ribbon cable faces towards the ports at the back of the chassis.
   2. Attach the end connector on the bus cable to the CT bus edge connector at the top of the card in the slot closest to the side of the chassis.
   3. Connect the next bus connector to the next port board, and so on.
   4. When finished, if the cable has extra connectors or loose ribbon cable, tuck the cable down so that it does not snag when you replace the cover.
4. Reattach any other interior cables if needed.
5. 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.

6. Replace the circuit card hold-down bracket.
7. Replace the top cover and front bezel.
8. 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:
   • Dialogic port boards:
     • After the system boots, configure and test the new board as described in Chapter 4 of the Installation guide (pdf).

     Note: If you reseat or replace a Dialogic board, you might need to reconfigure all Dialogic boards in the system. Verify the settings for all the port boards in the Dialogic Configuration Manager after you install, reseat, or replace a Dialogic board.

   • 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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