TP-Link TL-SM321A User manual

User Guide
TL-SM321A / TL-SM321B
1000Base-BX WDM Bi-Directional SFP Module
Rev:1.0.3
7106503185

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 © 2009 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................................... 3
Chapter 3. Installation Guide ............................................. 3
Specifications .......................................................................... 4

1
Package Contents
The following items should be found in your package:
¾1000Base-BX WDM Bi-Directional SFP Module
¾Static Shielding Bag
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-SM321 Series 1000Base-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 1.25Gbit/sec. It can
effectively extend the diameter and bandwidth of the
workgroup. TL-SM321 Series SFP Module can be installed
inside the Switch which supplies power directly, it can
cooperate with TP-LINK products as the table below:

2
SFP Module Cooperated TP-LINK products
Managed Gigabit Switch
TL-SG3109
TL-SL3428
TL-SL3452
Web Smart Gigabit Switch
TL-SG2109WEB
TL-SG2216WEB
TL-SG2224WEB
TL-SL2210WEB
TL-SL2218WEB
TL-SL2428WEB
TL-SL2452WEB
Unmanaged Gigabit-Uplink Switch
TL-SL1351
SMB Broadband Router
TL-R4199G
TL-R4299G
Gigabit Media Converter
TL-SM321A
TL-SM321B
MC220L
)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.

3
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 10km
¾Hot-pluggable
¾RoHS Compliant
¾International Class 1 laser safety certified
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-SM321A
TP-LINK Switch 10km
Fiber TL-SM321B
TP-LINK Switch

4
Specifications
Normal TL-SM321A TL-SM321B
Tx:1550nm Tx:1310nm
Wave Length
Rx:1310nm Rx:1550nm
Standards and Protocols IEEE 802.3ah 1000Base-BX,
CSMA/CD, TCP/IP
Cable Single-mode Fiber
Fiber Type 9/125 um Single-mode
Max. Cable Length 10km
Data Rate 1.25Gbps
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