To install and remove the transceiver optics in a right way is very necessary to ensure the network to work stably and efficiently. Today, we are going to introduce an installation guide of QSFP+ transceivers and DAC/AOC cables in 40G network.

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Fiberstore (FS.COM) | How to Install/Remove QSFP+ Transceivers and DAC/AOC Cables
To install and remove the transceiver optics in a right way is very necessary to ensure the network
to work stably and efficiently. Today, we are going to introduce an installation guide of QSFP+
transceivers and DAC/AOC cables in 40G network.
40GbE QSFP+ Transceivers Overview
40 Gigabit Ethernet (40GbE) aggregation
switches are becoming more common in today’s
data centers. At the heart of the 40GbE network
layer is a pair of transceivers connected by a
cable. The transceivers are plugged into either
network servers or a variety of components
including interface cards and switches and
connected via the cables such as OM3 and OM4
for multimode application. Additionally DAC
(Direct Attach Copper) cables or AOCs (Active Optical Cables) are used for short interconnection as a
more cost-effective alternative solution. QSFP+ (Quad Small Form-factor Pluggable Plus) is the most
common 40GbE interface type, and also as a high-density 10GbE interface via QSFP+ breakout
cables. QSFP+ interfaces a network device (switch, router, media converter or similar device) to a
fiber optic or copper cable, supporting data rates from 4×10 Gbps and supports Ethernet, Fibre
Channel, InfiniBand and SONET/SDH standards with different data rate options. Compared to CFP (C
form-factor pluggable) transceiver modules, QSFP+ transceiver modules are more compact and
more suitable for port-density application. The two basic interface specifications of QSFP+ modules
respectively for multimode and single-mode applications are 40GBASE-SR4 and 40GBASE-LR4. In
addition, to satisfy a number of different objectives including support for MMF and SMF
compatibility, there are other types of QSFP+ modules offered by different vendors.
How to Install/Remove QSFP+ Transceivers and DAC/AOC Cables Preparations
As QSFP+ transceivers and DAC/AOC cables are hot-pluggable, you can install or remove QSFP+
modules in your switch without powering off the system. However, to protect a QSFP+ module or
cable from ESD (electro-static discharge) damage, before installing or removing a QSFP+ module or
How to Install/Remove
QSFP+ Transceivers
and DAC/AOC Cables

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Fiberstore (FS.COM) | How to Install/Remove QSFP+ Transceivers and DAC/AOC Cables
cable, be remembered that always wear an ESD wrist strap and
make sure that it makes good skin contact and is securely
grounded (If you are using ESD gloves, wear the wrist strap
outside the ESD glove).
 To Install/Remove a QSFP+ Transceiver Module
There are two types of clasp designed for a QSFP+ transceiver module—plastic clasp or a metallic
clasp.
>To Install a QSFP+ Transceiver Module
Step 1. Remove the QSFP+ module from its
antistatic container and remove the dust covers
from the module optical connector.
Step 2. Remove any rubber dust covers from the
port where you are installing the QSFP+ module.
Step 3. Pivot the clasp of the module up. (Skip this
step if the clasp is plastic.)
Step 4. Align the module with the port in the
chassis.
Step 5. Holding the module, gently push in the module until it is firmly seated in the port.
Step 6. Immediately attach the patch cord with MPO connector or duplex LC connector to the
QSFP+ transceiver module.
Note: Install the dust plug for the transceiver module if you are not to install an optical fiber into it.
>To Remove a QSFP+ Transceiver Module
Step 1. Remove the optical fiber if any.
Step 2. Pivot the clasp of the module down to the horizontal position. (Skip this step if the clasp is
plastic.)
Step 3. Holding the module, gently pull the module out of the port.
Step 4. Place the QSFP+ transceiver into an antistatic bag.
 To Install/Remove a 40G QSFP+ Cable
The installation and removal procedures are the same for QSFP+ DAC cables and QSFP+ AOC cables.
Here uses a QSFP+ DAC cable as an example:
>To Install a QSFP+ DAC Cable
Step 1. Align the QSFP+ transceiver module (with
the clasp on top) at one end of the cable with the
port in the chassis.
Step 2. Horizontally and gently push in the module

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Fiberstore (FS.COM) | How to Install/Remove QSFP+ Transceivers and DAC/AOC Cables
to fully seat it in the port.
>To remove a QSFP+ DAC Cable
Step 1. Gently press and release the QSFP+ transceiver module.
Step 2. Holding the cable, gently pull the clasp on the cable to pull out the transceiver module.
 To Install/Remove a 40G QSFP+ to 4x10G SFP+ Cable
QSFP to 4xSFP+ breakout DAC40G QSFP+ to 4x10G SFP+ cable combines one 40G QSFP+ module on
one end and four 10G SFP+ module on the other end.
The installation and removal procedures of 40G
QSFP+ connector are introduced above. Here only
introduced the installation and removal of 10G SFP+
module:
>To Install an SFP+ Transceiver Module
Step 1. Align the module with the SFP+ port, with the
golden plating facing the spring tab in the SFP+ port.
If the chassis has two rows of ports, the spring tab in
a port is on the bottom in the upper row and on the
top in the lower row.
Step 2. Slightly press the module against the spring tab so you can push the module straight into the
port.
>To Remove an SFP+ Transceiver Module
Step 1. Press the module with your thumb.
Step 2. Gently pull the clasp on the cable to pull out the transceiver module.
Verifying the installation
Execute the display transceiver interface command on the device to verify that the transceiver
module or DAC/AOC cable is installed correctly. If the transceiver module and DAC/AOC cable
information is displayed correctly, the installation is correct (as the following picture shown). If an
error message is displayed, the installation is incorrect or the transceiver optics is not compatible.

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Conclusion
As 40 GbE are widely deployed, 40G transceiver optics are ubiquitous. A good practice and correct
installation are very important for 40G network system, not only to protect the 40G transceiver
optics and device from damage, but also to ensure a stable performance for system. In addition, by
executing the display transceiver interface command, we can verify whether the installation is
correct. Of course, the premise is that the transceiver optics you use is fully compatible with your
device. Fiberstore offers a comprehensive line of high-compatible 40G transceiver optics, such as
40GBASE-SR4 QSFP+, 40GBASE-LR4 QSFP+ and 40G DACs and AOCs with competitive prices. Each of
them is tested in original-brand switch which ensures the 100% compatibility to your device. For
more information or quotation, please contact us via sales@fs.com.
For more details about this topic, please visit here.

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Notice: This document is for informational purposes only and does not set forth any warranty, expressed or
implied, concerning any equipment, equipment features, or service offered or to be offered by Fiberstore.
Fiberstore reserves the right to make changes to this document at any time, without notice, and assumes no
responsibility for its use. This information document describes features that may not be currently available.
Contact a Fiberstore sales team for information on feature and product availability.
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