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Replacing a T4000 PIC

 
  1. Removing a T4000 PIC

  2. Installing a T4000 PIC

Removing a T4000 PIC

PICs are hot-insertable and hot-removable. When you remove a PIC, the router continues to function, although the PIC interfaces being removed no longer function.

The PICs are located in the FPCs installed in the front of the router. A PIC weighs approximately 2 lb (0.9 kg).

To remove a PIC (see Figure 1):

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface to receive the PIC. If the PIC connects to fiber-optic cable, have ready a rubber safety cap for each transceiver and cable.
  2. Attach an electrostatic discharge ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  3. Use one of the following methods to take the PIC offline:
    • Issue the following CLI command:

      user@host> request chassis pic fpc-slot fpc-slot pic-slot pic-slot offline
    • Press and hold the online/offline button until the status LED on the PIC goes out (about 5 seconds). The label for the status LED varies for each PIC. See the T4000 Core Router Interface Module Reference for more information about the PIC LEDs.

      For a Type 4 or Type 5 PIC, use a narrow-ended tool that fits inside the opening that leads to the button.

  4. Label the cables connected to the PIC so that you can later reconnect each cable to the correct PIC.
  5. Disconnect the cables from the PIC. If the PIC uses fiber-optic cable, immediately cover each transceiver and the end of each cable with a rubber safety cap.Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.

    Caution

    Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

  6. Arrange the cable in the cable management system to prevent it from dislodging or developing stress points. Secure the cable so that it is not supporting its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.Caution

    Avoid bending fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

  7. Type 4 or Type 5 PIC—To unseat the PIC, twist the ejector handle at the bottom of the PIC faceplate, then twist the ejector handle at the top of the faceplate counterclockwise to unseat the PIC.
  8. Slide the PIC out of the FPC card carrier, and place it in the electrostatic bag or on the antistatic mat.
  9. If you are not reinstalling a PIC into the emptied PIC slot within a short time, install a blank PIC panel over the slot to maintain proper airflow in the FPC card cage.
Figure 1: Removing a PIC
Removing a PIC

Installing a T4000 PIC

To install a PIC (see Figure 2).

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. If the PIC uses fiber-optic cable, verify that there is a rubber safety cap over each transceiver on the faceplate. Install a cap if necessary.
  3. Align the notches in the connector at the rear of the PIC with the notches in the PIC slot in the FPC, and then slide the PIC in until it lodges firmly in the FPC.Caution

    Slide the PIC straight into the slot to avoid damaging the components on the bottom of the PIC.

  4. Type 4 or Type 5 PICs—To secure the PIC to the FPC faceplate, twist the ejector handle at the bottom of the PIC faceplate, then twist the ejector handle at the top of the faceplate counterclockwise to unseat the PIC.
  5. If the PIC uses fiber-optic cable, remove the rubber safety cap from each transceiver and the end of each cable.Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.

    Caution

    Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

  6. Insert the appropriate cables into the cable connectors on the PIC.
  7. Arrange each cable in the cable management system to prevent the cable from dislodging or developing stress points. Secure the cable so that it is not supporting its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.Caution

    Do not let fiber-optic cable hang free from the connector. Do not allow fastened loops of cable to dangle, which stresses the cable at the fastening point.

    Caution

    Avoid bending fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

  8. Use one of the following methods to bring the PIC online:
    • Press the PIC offline/online button until the status LED on the PIC lights green. For a Type 4 or Type 5 PIC, use a narrow-ended tool that fits inside the opening that leads to the button.

      For more information about the PIC LEDs, see the T4000 Core Router Interface Module Reference.

    • Issue the following CLI command:

      user@host> request chassis pic fpc-slot fpc-slot pic-slot pic-slot online

    The normal functioning status LED confirms that the PIC is online. You can also verify correct PIC functioning by issuing the show chassis fpc pic-status command.

Figure 2: Installing a PIC
Installing a PIC