• Supported Platforms
• MX240 Routers

• Related Topics
• Preventing Electrostatic Discharge Damage to an MX240 Router
• Maintaining MX240 PICs
• Troubleshooting the MX240 PICs
• MX240 PIC Serial Number Label
• MX240 PIC Description
• Replacing an MX240 FPC

Replacing a Cable on an MX240 DPC, MPC, MIC, or PIC

1. Removing a Cable on an MX240 DPC, MPC, MIC, or PIC
2. Installing a Cable on an MX240 DPC, MPC, MIC, or PIC

Removing a Cable on an MX240 DPC, MPC, MIC, or PIC

Removing and installing cables on a DPC, MPC, MIC, or PIC does not affect router function, except that the component does not receive or transmit data while its cable is disconnected.

To remove a cable:

1. If the component connects to fiber-optic cable, have ready a rubber safety cap for each cable and transceiver.
2. If removing all cables connected to the component, use one of the following methods to take the component offline:
   • To take a DPC or an MPC offline:
     • Press and hold the corresponding online button on the craft interface. The green OK LED next to the button begins to blink. Hold the button down until the LED goes off.
     • Issue the following CLI command:
       
       

       user@host>request chassis fpc slot slot-number offline

       For more information about the command, see the Junos System Basics and Services Command Reference.

   • To take a PIC offline:
     • Press the online/offline button on the PIC. For a PIC installed in an FPC2 or FPC3, use a narrow-ended tool that fits inside the opening that leads to the button. Press and hold the button until the PIC LED goes off (about 5 seconds).
     • Issue the following CLI command:
       
       

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

       For more information about the command, see the Junos System Basics and Services Command Reference.

   • To take a MIC offline:
     • Press the online/offline button on the MIC. Use a narrow-ended tool that fits inside the opening that leads to the button. Press and hold the button until the MIC LED goes off (about 5 seconds).
     • Issue the following CLI command:
       
       

       user@host> request chassis mic fpc-slot mpc-slot pic-slot mic-slot offline

       For more information about the command, see the Junos System Basics and Services Command Reference.

3. Unplug the cable from the cable connector port. If the component 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.

Installing a Cable on an MX240 DPC, MPC, MIC, or PIC

To install a cable on a DPC, MPC, MIC, or PIC:

1. Have ready a length of the type of cable used by the component. For cable specifications, see the MX Series 3D Universal Edge Routers Line Card Guide.
2. If the cable connector port is covered by a rubber safety plug, remove the plug.

   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.

3. Insert the cable connector into the cable connector port on the faceplate.

   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.

   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.

4. Insert the other end of the cable into the destination port.
5. Repeat the previous steps for any additional cables.
6. If the component is offline (its failure indicator LED is lit), use one of the following methods to bring the PIC online:
   • To bring a DPC or an MPC online:
     • Press and hold the corresponding online button on the craft interface until the green OK LED next to the button lights steadily, in about 5 seconds.
     • Issue the following CLI command:
       
       

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

       For more information about the command, see the Junos System Basics and Services Command Reference.

   • To bring a PIC online:
     • Press the PIC offline/online button until the PIC LED lights green. For a PIC installed in FPC3, use a narrow-ended tool that fits inside the opening that leads to the button.
     • Issue the following CLI command:
       
       

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

       For more information about the command, see the Junos System Basics and Services Command Reference.

   • To bring a MIC online:
     • Press the MIC offline/online button until the PIC LED lights green.
     • Issue the following CLI command:
       
       

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

       For more information about the command, see the Junos System Basics and Services Command Reference.

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