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Replacing an M7i FIC or PIC Cable

 

Removing and installing FIC or PIC cables does not affect router function, except that a PIC does not receive or transmit data while its cable is disconnected. To replace a PIC cable, perform the following procedures:

Removing an M7i FIC or PIC Cable

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 FIC or PIC cable:

  1. If the interface connects to fiber-optic cable, have ready a rubber safety cap for each cable you are removing.
  2. If removing all cables connected to the interface, 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.
  3. Unplug the cable from the cable connector port. If the interface uses fiber-optic cable, immediately cover each transceiver and the end of each cable with a rubber safety cap.
  4. 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.

Installing an M7i FIC or PIC Cable

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 cable (see Figure 1):

  1. Have ready a length of the type of cable used by the interface, as specified in FIC Specifications for the M7i Router.
  2. If the interface cable connector port is covered by a rubber safety plug, remove the plug.
  3. Insert the cable connector into the cable connector port on the interface faceplate.
  4. 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.
  5. Verify that the FIC or PIC is functioning correctly by noting whether the normal function indicator LED is lit. The normal function indicator LED is usually green; for more information, see the M7i Multiservice Edge Router Interface Module Reference.

    You can also 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 1: Connecting Fiber-Optic Cable to a PIC
Connecting Fiber-Optic
Cable to a PIC