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PICs for the M20 Router and the M40 Router

This section describes how to install or replace a PIC on the M20 and M40 routers.

To replace a PIC on an M20 or M40 router, you must first remove the FPC in which the PIC is installed. The FPCs are hot-insertable and hot-removable, so you can remove and replace them without powering off the router. When you remove an FPC, the router continues to function, but the PICs installed on the FPC do not receive or transmit data.

The procedures described in the following sections are for single-wide PICs only. For instructions for the quad-wide SONET/SDH OC48 PIC, see Installing or Replacing a Quad-Wide PIC.

Removing an FPC from an M20 Router

On an M20 router, the FPCs are installed into the front of the chassis below the craft interface.

To remove an FPC from an M20 router, follow this procedure:

  1. Place an antistatic foam mat on a flat, stable surface to receive the FPC. If a foam mat is not available, use a standard flat antistatic mat but use extra care when laying the FPC on it to avoid damaging the electrical components. If any of the PICs on the FPC use fiber-optic cable, also have ready a rubber safety cap for each transceiver and cable.
  2. Attach an ESD wrist strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. Label the cables connected to each PIC on the FPC so that you can reconnect each cable to the correct PIC.
  4. Take the FPC offline by pressing and holding its offline button for 5 seconds or until the green OK LED next to the button goes out. On an M20 router, the FPC offline buttons are located in a column at the right side of the craft interface.
  5. Disconnect the cables from the PICs on the FPC. If a PIC uses fiber-optic cable, immediately cover each transceiver and the end of each cable with a rubber safety cap. Arrange the disconnected cables in the cable management system.
  6. Unscrew the thumbscrews at the ends of the FPC.
  7. Pull the ends of the extractor clips, which are adjacent to the thumbscrews, away from the face of the FPC.
  8. Grasp the FPC with both hands and slide it about halfway out of the chassis. See Figure 3.
  9. Place one hand underneath the FPC to support it, and slide it completely out of the chassis. Set the FPC on the antistatic foam mat that you prepared in Step Step 1, component-side down and with the PIC faceplates facing you.

    To avoid damaging any components, use extra care when laying the FPC component-side up on the antistatic mat, particularly if the mat is not made of foam.

    Do not stack the FPC on top of or under any other component.

    Figure 3: Removing an FPC from an M20 Router

    Image g001114.gif

Removing a PIC from an M20 FPC

Before removing a PIC from an M20 FPC, you must first remove its host FPC from the chassis (see Removing an FPC from an M20 Router). Then follow this procedure:

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface to receive the PIC.
  2. Attach an ESD strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. With the FPC lying component-side down and with the PIC faceplates facing you, use a Phillips screwdriver to loosen and remove the two screws that secure the PIC to the FPC.
  4. Carefully turn over the FPC and lay it on the mat component-side up with the PIC faceplates facing you.
  5. Grasp the PIC by its faceplate and gently pull it straight out of the slot.   

    You might need to rock the rear end of the PIC back and forth to loosen it from the connector in the FPC slot. To avoid bending the pins on the connector, use the smallest and gentlest motion possible.

  6. Place the PIC in the electrostatic bag or on the antistatic mat that you prepared in Step Step 1.

Installing a PIC in an M20 FPC

To install a PIC in an M20 FPC, follow this procedure:

  1. Attach an ESD strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. With the FPC lying on an antistatic foam mat component-side up and with the PIC faceplates facing you, push the PIC part way into the slot. Carefully align the tabs on the PIC connector with the notches in the connector at the rear of the FPC slot, and push the PIC in until the connectors join (see Figure 4).   

    If the pins on the FPC connector are not aligned properly with the holes in the PIC connector, the pins might be bent or the holes damaged. Either kind of damage can prevent the PIC and FPC from functioning correctly.

  3. Carefully turn over the FPC and lay it on the mat component-side down with the PIC faceplates facing you.
  4. Using a Phillips screwdriver, tighten the two screws that secure the PIC in the FPC.

    Figure 4: Installing a PIC in an M20 FPC

    Image g001007.gif

Installing an FPC in an M20 Router

To install an FPC in an M20 router, follow this procedure:

  1. Attach an ESD strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Grasp the front of the FPC with both hands.
  3. Align the rear corners of the FPC with the guides in the FPC slot in the chassis.
  4. Slide the FPC all the way into the card cage until it contacts the midplane 

    When about 1 in. (2.5 cm) of the FPC remains outside the slot, adjust the insertion speed so that it takes between 1 and 15 seconds for the FPC to contact the midplane. Completing the insertion too quickly or too slowly can cause the router to reset.

  5. Push the ends of the extractor clips, located at the ends of the FPC, toward the face of the FPC. See Figure 5.

    Figure 5: Installing an FPC in an M20 Router

    Image g001113.gif

  6. Tighten the thumbscrews at the ends of the FPC.
  7. If any of the PICs on the FPC use fiber-optic cable, remove the rubber safety cap from each transceiver and the end of each cable.
  8. Insert the appropriate cables into the ports on each PIC on the FPC and arrange the cables in the cable management system.
  9. If you are installing multiple FPCs, repeat Step Step 2 through Step Step 8 for each one. Wait 30 seconds after installing each FPC to allow the FPC and PICs to come online.

When a PIC is functioning normally, its status LED lights green. Some PICs have a single status LED and others have one LED per port. For more information, see the M20 PIC Guide.

You can also use the following CLI command to confirm correct PIC functioning:

user@host> show chassis fpc pic-status fpc-slot

For more information, see the JUNOS Protocols, Class of Service, and System Basics Command Reference.

For a PIC to function, you must add the necessary statements for it to the router configuration. For instructions, see the JUNOS Network Interfaces and Class of Service Configuration Guide.


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