Replace a Fiber Shuffle Cable

1. Follow safety and ESD precautions.

   See Safety and ESD Precautions.

2. Find the faulty fiber shuffle cable.

   The following table lists the fiber shuffle associations in groups of three or four slots per fiber shuffle.

   Slots By Group for Fiber Shuffle Cables 3, 5, 7, 9 4, 6, 8, 10 11, 13, 15, 17 2, 14, 16, 18 21, 23, 25 22, 24, 26 27, 29, 31, 33 28, 30, 32, 34

3. Remove the FBS covers:

   See Replace an FBS PCB for FBS cover removal instructions.

   1. Remove the FBS cover at the location of the failing fiber shuffle cable
   2. Remove the covers of the other three tails of the fiber shuffle cable (within the same group).
4. Disconnect the cable tails:
   1. Disconnect the faulty fiber shuffle cable, hanging it out of the way.
      1. If the faulty shuffle cable is on the switch at slot 37 or 39, remove the PMT-A fiber cable.
      2. If the faulty shuffle cable is on the switch at slot 38 or 40, remove the PMT-B fiber cable.
   2. Disconnect those other three tails (within the same group), hanging them out of the way.
5. Remove the three FBS covers in-between the FBS covers that you already removed.
6. Label the six fiber shuffle cable ends with the labels provided in the FRU kit.
7. Connect the new fiber shuffle cable to the ports.
8. Starting at the bottom, reinstall the FBS covers:
   1. Install all but the top two of the removed FBS covers.
   2. Remove the nearby FBS covers, and start laying in the replacement cable, reinstalling FBS covers as you install the cable up the frame.

      See Precautions for Handling Cords and Cables.

9. Disconnect the faulty fiber shuffle cable from the two switches, and coil it up out of the way.
10. Connect the new fiber shuffle cable to the new switches:
    1. Coil up the excess shuffle length.
    2. Velcro the cable to the fiber tray.

Related Information

• Front Components

• Identifying Component Locations and Slot Numbers

• Safety and ESD Precautions

• Identifying Port Mapping

• Replacing Switches