Connecting the EX4300 to Network
Connecting a Fiber-Optic Cable
Before you begin to connect a fiber-optic cable to an optical transceiver installed in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
To connect a fiber-optic cable to an optical transceiver installed in a device:
Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to transceivers emit laser light that can damage your eyes.
- If the fiber-optic cable connector is covered with a rubber safety cap, remove the cap. Save the cap.
- Remove the rubber safety cap from the optical transceiver. Save the cap.
- Insert the cable connector into the optical transceiver
(see Figure 1).
Figure 1: Connecting a Fiber-Optic Cable to an Optical Transceiver Installed in a Device 
- Secure the cables so that they do not support their own
weight. Place excess cable out of the way in a neatly coiled loop.
Placing fasteners on a loop helps cables maintain their shape.
Caution Do not bend fiber-optic cables beyond their minimum bend radius. An arc smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose.
Do not let fiber-optic cables hang free from the connector. Do not allow fastened loops of cables to dangle, which stresses the cables at the fastening point.
Installing a Transceiver
The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace them without powering off the device or disrupting the device functions.
After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.
If you face a problem running a Juniper Networks device that uses a third-party optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.
Before you begin to install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings).
Ensure that you have a rubber safety cap available to cover the transceiver.
Figure 2 shows how to install a QSFP+ transceiver. The procedure is the same for all types of transceivers except the QSFP28 and CFP transceivers.
To install a transceiver:
To prevent electrostatic discharge (ESD) damage to the transceiver, do not touch the connector pins at the end of the transceiver.
- Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
- Remove the transceiver from its bag.
- Check to see whether the transceiver is covered with a
rubber safety cap. If it is not, cover the transceiver with a rubber
safety cap.
Warning Do not leave a fiber-optic transceiver uncovered except when inserting or removing a cable. The rubber safety cap keeps the port clean and prevents accidental exposure to laser light.
- If the port in which you want to install the transceiver is covered with a dust cover, remove the dust cover and save it in case you need to cover the port later. If you are hot-swapping a transceiver, wait for at least 10 seconds after removing the transceiver from the port before installing a new transceiver.
- Using both hands, carefully place the transceiver in the
empty port. The connectors must face the chassis.
Caution Before you slide the transceiver into the port, ensure that the transceiver is aligned correctly. Misalignment might cause the pins to bend, making the transceiver unusable.
- Slide the transceiver in gently until it is fully seated. If you are installing a CFP transceiver, tighten the captive screws on the transceiver by using your fingers.
- Remove the rubber safety cap when you are ready to connect
the cable to the transceiver.
Warning Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to transceivers emit laser light that can damage your eyes.
1 — Ejector lever |