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Cisco CGS 2520 Hardware Installation Guide
OL-31444-01
Chapter 2 Switch Installation
Installing and Removing SFP Modules
Installing and Removing SFP Modules
Small-form-factor pluggable (SFP) modules provide the uplink optical interfaces, laser send (TX) and
laser receive (RX).
When installing or removing SFP modules, observe these guidelines:
• Removing and installing an SFP module can shorten its useful life. Do not remove and insert any
module more often than is absolutely necessary.
• To prevent ESD damage, follow your normal board and component handling procedures when
connecting cables to the switch and other devices.
Warning
Class 1 laser product.
Statement 1008
Caution Do not remove the dust plugs from the fiber-optic SFP module port or the rubber caps from the
fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the SFP module
ports and cables from contamination and ambient light.
Caution We strongly recommend that you not install or remove the SFP module while the fiber-optic cable is
attached to it because of the potential damage to the cables, to the cable connector, or to the optical
interfaces in the SFP module. Disconnect the cable before you remove or install an SFP module.

Installing SFP Modules

This section describes how to install Small Form Factor pluggable (SFP) modules. SFP modules are
inserted into the SFP modules connected to the switch.
Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface.
Step 2 Find the send (TX) and receive (RX) markings on the module top.
Note On some SFP modules, the send and receive (TX and RX) markings might be replaced by arrows
that show the direction (send or receive) of the connection.
Step 3 If the module has a bale-clasp latch, move it to the open, unlocked position.
Step 4 Align the module in front of the slot opening, and insert until you feel the connector snap into place.
Step 5 If the module has a bale-clasp latch, close it to lock it into place.
Step 6 For fiber-optic SFP modules, remove the dust plugs and store them in a clean location for reuse.
Caution Do not remove the dust plugs from the fiber-optic SFP module port until you are ready to
insert the SFP cables.
Step 7 Connect the SFP cables.