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Installing or Replacing a Quad-Wide PIC

The SONET/SDH OC48 PIC for the M20 and M40 routers and the SONET/SDH OC192 PIC for the M160 router are called quad-wide because they occupy an entire slot in the FPC card cage (the slot otherwise accommodates an FPC housing four PICs). Quad-wide PICs combine the functions of a PIC and an FPC, and you remove and replace them in the same manner as an FPC.

Quad-wide PICs are hot-insertable and hot-removable, so you can remove and replace them without powering down the router. Removing a quad-wide PIC does not affect router function, except that the PIC no longer receives or transmits data.

Removing a Quad-Wide PIC

To remove a quad-wide PIC from an M20, M40, or M160 router, follow this procedure:

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface to receive the PIC. Also have ready a rubber safety cap for the transceiver and fiber-optic cable.
  2. Attach an ESD strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  3. Take the PIC offline by pressing the offline button for the FPC slot in which the PIC is installed. The offline button is located on the craft interface directly above the FPC slot. Hold the button for about 5 seconds, or until the red FAIL LED next to the button lights.
  4. Disconnect the cable from the PIC and immediately cover the transceiver and the end of the cable with a rubber safety cap. Arrange the disconnected cables in the cable management system.
  5. Unscrew the thumbscrews at the ends of the PIC faceplate simultaneously and at about the same rate (unscrewing the two screws alternately or at very different rates can cause the PIC to become lodged in the FPC slot, making it difficult to turn the screws).
  6. Pull the ends of the ejector levers, which are adjacent to the thumbscrews, away from the PIC faceplate.
  7. Grasp the PIC by the ejector levers and slide it about halfway out of the chassis.
  8. Place one hand underneath the PIC to support it, slide it completely out of the chassis, and place it in the electrostatic bag or on the antistatic mat that you prepared in Step  1.

Installing a Quad-Wide PIC

To install a quad-wide PIC 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. Remove the PIC from its electrostatic bag and place it on an antistatic mat. Verify that there is a rubber safety cap on the transceiver.
  3. Pull the ends of the ejector levers on the PIC outward so they are perpendicular to the PIC faceplate.
  4. Align the rear of the PIC with the guides at the top and bottom of the FPC slot and then slide the PIC into the slot until it lodges firmly in the midplane or backplane.
  5. Push the ends of the ejector levers inward until they are nearly flush with the PIC faceplate.
  6. Tighten the thumbscrews at the ends of the PIC faceplate simultaneously and at about the same rate (tightening the two screws alternately or at very different rates can cause the PIC to become lodged in the FPC slot, making it difficult to turn the screws). Verify that the PIC is seated properly.
  7. Remove the rubber safety cap from the transceiver and cable, insert the cable into the transceiver, and arrange the cable in the cable management system.
  8. Press and hold the PIC offline button until the PIC's status LED lights green to indicate normal functioning, which usually takes about 5 seconds.

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 System Basics and Services Command Reference.

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


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