TP-Link TL-SM221A User manual

User Guide
TL-SM221A / TL-SM221B
100Base-BX WDM Bi-Directional SFP Module
Rev:1.0.1
7106503184

COPYRIGHT & TRADEMARKS
Specifications are subject to change without notice.
is a registered trademark of TP-LINK
TECHNOLOGIES CO., LTD. Other brands and product names are
trademarks or registered trademarks of their respective holders.
No part of the specifications may be reproduced in any form or by any
means or used to make any derivative such as translation, transformation,
or adaptation without permission from TP-LINK TECHNOLOGIES CO.,
LTD. Copyright © 2008 TP-LINK TECHNOLOGIES CO., LTD. All rights
reserved.
http://www.tp-link.com

FCC STATEMENT
This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
¾Reorient or relocate the receiving antenna.
¾Increase the separation between the equipment and
receiver.
¾Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
¾Consult the dealer or an experienced radio/ TV technician
for help.
This device complies with part 15 of the FCC Rules. Operation is
subject to the following two conditions:
1) This device may not cause harmful interference.

2) This device must accept any interference received,
including interference that may cause undesired operation.
Any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate
the equipment.
CE Mark Warning
This is a class B product. In a domestic environment, this product
may cause radio interference, in which case the user may be
required to take adequate measures.
SAFETY NOTICES
¾Do not use this product near water, for example, in a wet
basement or near a swimming pool.
¾Avoid using this product during an electrical storm. There may
be a remote risk of electric shock from lightning.

CONTENTS
Package Contents...........................................................................1
Chapter 1. Introduction .............................................................1
Chapter 2. Features of the product..........................................2
Chapter 3. Installation Guide ....................................................3
Specifications .................................................................................4

1
Package Contents
The following items should be found in your package:
¾Ten 100Base-BX WDM Bi-Directional SFP Modules
¾Ten Static Shielding Bags
¾This User Guide
)Note:
Make sure that the package contains the above items. If any of the
listed items are damaged or missing, please contact with your
distributor.
Chapter 1. Introduction
TL-SM221 Series 100Base-BX WDM Bi-Directional SFP Module is a
hot pluggable 3.3V SFP (Small-Form-Factor) Bi-Directional
transceiver module, which adopts WDM (Wavelength Division
Multiplexing) technology that increases the information carrying
capacity of fiber via multiplex transmit and receive signals at
different wavelengths on single strand cable. It’s designed expressly
for high-speed communication applications that requires rates of up
to 155Mbit/sec. It can effectively extend the diameter and bandwidth
of the workgroup. TL-SM221 Series SFP Module can be installed
inside the Switch which supplies power directly, it also can
cooperate with TP-LINK products as the table below:

2
SFP Module Cooperated TP-LINK products
TL-SG2216WEB Web Smart Gigabit Switch
TL-SM221A
TL-SM221B TL-SG2224WEB Web Smart Gigabit Switch
)Note:
If any abnormal status occurs when the light modules of the device
are hot-switched between 1000Mbps and 100Mbps, please try to
power on the device again.
Chapter 2. Features of the product
¾Single-mode WDM Bi-Directional SFP Module operate at
1550nm/1310nm
¾Bi-Directional transmit with one fiber which can save cost
¾Single LC receptacle optical interface compliant
¾The maximal transmission distance of Single-mode WDM
Bi-Directional SFP Module is 15km
¾Hot-pluggable
¾RoHS Compliant
¾International Class 1 laser safety certified

3
Chapter 3. Installation Guide
The following will take the installation procedure in the switch for
example.
¾Push the SFP Module into Switch along the track smoothly
¾Plug fiber into the module, without any configuration manually,
the SFP Module can work.
Warning:
1. In order to avoid ESD (ElectroStatic Discharge), do not touch
the output pins on the module with your hand.
2. Avoid directly looking towards the output port of the light
modules and never locate the working fiber pointing to the
eyes, otherwise may cause injury to your eyes.
TL-SM221A
TP-LINK Switch 15km
Fibe
r
TL-SM221B
TP-LINK Switch

4
Specifications
Normal TL-SM221A TL-SM221B
Tx:1550nm Tx:1310nm
Wave Length
Rx:1310nm Rx:1550nm
Standards and Protocols IEEE 802.3ah 100Base-BX,
CSMA/CD, TCP/IP
Cable Single-mode Fiber
Fiber Type 9/125 um Single-mode
Max. Cable Length 15km
Data Rate 155Mbps
Port Type LC
Power Support 3.3V
Safety & Emission FCC, CE
Environmental and Physical
Operating Temp. 0℃~70℃(32℉~158℉)
Storage Temp. -40℃~80℃(-40℉~176℉)
Operating Humidity 10%~90% RH, Non-condensing
Storage Humidity 5%~90% RH, Non-condensing