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Replacing an M7i PIC

 

PICs are housed in the front of the router, as shown in M7i Chassis Description. PICs are hot-insertable and hot-removable, as described in M7i Field-Replaceable Units (FRUs). Removing a PIC does not affect router function, except that the PIC no longer receives or transmits data.

To replace a PIC, perform the following procedures:

Removing an M7i PIC

Warning

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

Caution

When handling fiber-optic transceivers and fiber-optic cable, observe the following precautions:

  • 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.

  • Do not bend 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.

  • 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.

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. Verify that the router is attached to a proper earth ground.
  3. If the PIC has multiple cable connector ports, label the cable connected to each port so that you can later reconnect the cables correctly.
  4. Press and hold the PIC offline button on the FIC until its failure indicator LED lights, which usually takes about 5 seconds. The failure LED is usually red; for more information, see the M7i Multiservice Edge Router Interface Module Reference.
  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.
  6. Arrange the cable 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. Placing fasteners on the loop helps to maintain its shape.
  7. Pull the right end of the PIC ejector lever away from the PIC faceplate. This disconnects the PIC from the midplane.
  8. Slide the PIC out of the chassis and place it in the electrostatic bag or on the antistatic mat.
  9. If you are not reinstalling a PIC into the empty PIC slot within a short time, install a blank PIC panel over the slot to maintain proper airflow in the chassis.
Figure 1: Removing a PIC
Removing a PIC

Installing an M7i PIC

Warning

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

Caution

When handling fiber-optic transceivers and fiber-optic cable, observe the following precautions:

  • 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.

  • Do not bend 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.

  • 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.

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. Verify that the router is attached to a proper earth ground.
  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. Pull the ejector lever away from the PIC faceplate and hold it while you insert the PIC.
  4. Align the rear of the PIC with the guides located at the bottom corners of the PIC slot.
  5. Slide the PIC into the card cage until about 0.5 in. (1 cm) of the PIC remains outside the slot and you feel some resistance. Release the ejector lever.Caution

    Be careful to insert the PIC straight into the chassis to avoid damaging the components on the bottom of the PIC.

  6. Continue pushing the PIC until it contacts the midplane and you hear a click. The ejector lever engages and closes automatically.
  7. If the PIC uses fiber-optic cable, remove the rubber safety cap from each transceiver.
  8. Insert the appropriate cable into the cable connector ports on the PIC.
  9. Arrange the cable 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. Placing fasteners on the loop helps to maintain its shape.
  10. Press and hold the PIC offline button on the FIC until the normal function indicator LED lights, which usually takes about 5 seconds. The normal function indicator LED is usually green; for more information, see the M7i Multiservice Edge Router Interface Module Reference.

You can verify correct PIC functioning by issuing the show chassis fpc pic-status command, described in Maintaining the M7i FIC and FIC Cables and PICs and PIC Cables.

Figure 2: Installing a PIC
Installing a PIC