Juniper M7i Hardware Guide

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 loopsofcable todangle, which stresses the cableat the fastening
point.
To install a replacement SFP (see Figure 61 on page 169):
1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
ESD points on the chassis.
2. Verify that a rubber safety cap covers the SFP transceiver, installing one if necessary.
3. Orient the SFP over the port in the PIC so that the connector end will enter the slot
first and the SFP connector faces the appropriate direction:
•
If the PIC has ten SFP ports, the ports are arranged in two columns. The SFP
connector faces to the right for ports in the left column, and to the left for ports in
the right column.
•
If the PIC has one or two SFP ports, the SFP connector faces to the left on platforms
in which FPCs install vertically in the chassis, and faces upward on platforms in
which FPCs install horizontally in the chassis.
4. Slide the SFP into the slot. If there is resistance, remove the SFP and flip it so that the
connector faces the other direction.
5. Remove the rubber safety cap from the transceiver and the end of the cable, and
insert the cable into the transceiver.
6. Arrange the cable in the cable management system to prevent the cable 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 in the cable management system. Placing fasteners on the loop helps to maintain
its shape.
7. Verify that the status LEDs on the PIC faceplate indicate that the SFP is functioning
correctly (there is an LED for each SFP port). For more information about the PIC
LEDs, see the M7i Multiservice Edge Router Interface Module Reference. You can also
Copyright © 2019, Juniper Networks, Inc.168
M7i Multiservice Edge Router Hardware Guide

Juniper M7i Specifications

General

Brand	Juniper
Model	M7i
Category	Network Router
Language	English