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Replace an Optical Line Terminal SFP+ Transceiver

The hot-pluggable integrated 10GbE PON OLT transceivers, with built-in Ethernet-to-10G PON MAC bridging, connect directly to the SFP+ ports on supported ACX Series routers. The OLT SFP+ transceiver is designed to interoperate with a broad range of popular third-party ONU devices. To avoid interference with other connectors and access to other management ports, you must not insert the OLT SFP+ transceiver into the following 10GbE ports of the ACX5400 line of routers:

  • ACX5448—Ports 5, 43, 45, and 47
  • ACX5448-D—Ports 5, 27, 29, and 31
  • ACX5448-M—Ports 7, 39, 41, and 43
Note:

When you insert the OLT SFP+ transceiver on the upper-row ports of the router, the external heatsink fins of the OLT extend above the chassis top plane by 1.9mm and use up rack space above the chassis. When you insert the OLT transceiver into the lower-row ports of the router, the external heatsink fins can obscure the status LEDs on the lower left corner of the device.

Install an OLT SFP+ 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.

  1. Wrap and fasten one end of the electrostatic discharge (ESD) wrist strap around your bare wrist, and connect the other end of the strap to a site ESD point.
  2. If the transceiver is not covered with a rubber safety cap, then cover it 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.
  3. 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.
    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.

  4. Using both hands, carefully insert the transceiver in the empty port.
    The connectors must face the chassis.
  5. Slide the transceiver in gently until it is fully seated.
    Figure 1: Insert an OLT Transceiver Insert an OLT Transceiver
  6. Remove the rubber safety cap from the transceiver and the end of the cable, and insert the cable into the transceiver.
  7. If there is a cable management system, arrange the cable in the cable management system to prevent the cable from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.
    CAUTION:

    Do not let a 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.
    CAUTION:

    Avoid bending a 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.
    Warning:

    Do not connect the OLT directly to ONUs such as a home gateway (HGW) without proper attenuation. The OLT can get permanently damaged unless it is connected with minimum 16dB attenuation (20dB recommended). A combination of attenuator and splitters can provide the required attenuation.
    Figure 2: Combination of Attenuators and Splitters Combination of Attenuators and Splitters
    HGW—Home Gateway

Remove an OLT SFP+ Transceiver

Before you begin to remove a transceiver from 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 the following parts and tools available:

  • An antistatic bag or an antistatic mat
  • Rubber safety caps to cover the transceiver and fiber-optic cable connector
  • A dust cover to cover the port or a replacement transceiver

The transceivers for Juniper Networks devices are hot-removable and hot-insertable FRUs. You can remove and replace them without powering off the device or disrupting the device functions.

  1. Place the antistatic bag or antistatic mat on a flat, stable surface.
  2. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to a site ESD point.
  3. Label the cable connected to the transceiver so that you can reconnect it correctly.
    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.
    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.
  4. Remove the cable connected to the transceiver.
  5. Cover the transceiver and the end of each fiber-optic cable connector with a rubber safety cap immediately after disconnecting the fiber-optic cables.
  6. If there is a cable management system, arrange the cable in the cable management system to prevent it from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.
    CAUTION:

    Do not bend the 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.
  7. By using your fingers, pull open the ejector lever on the transceiver to unlock the transceiver.
    CAUTION:

    Before removing the transceiver, make sure that you open the ejector lever completely until you hear it click. This prevents damage to the transceiver.
    Figure 3: Remove an OLT Transceiver Remove an OLT Transceiver
  8. Grasp the transceiver ejector lever and gently slide the transceiver approximately 0.5 in. (1.3 cm) straight out of the port.
    CAUTION:

    To prevent ESD damage to the transceiver, do not touch the connector pins at the end of the transceiver.
  9. By using your fingers, grasp the body of the transceiver and pull it straight out of the port.
  10. Place the transceiver in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
  11. Place the dust cover over the empty port or install the replacement transceiver.