*Orders placed after 11:45am on 23rd December will be processed on 5th January 2026. Please note – Deliveries are not guaranteed *

Excellent

4.83 / 5

9343 Reviews

Adam

Works well

John

Very good service, and the cable does exactly what I wanted it to

David

Ordered non compatible parts by mistake, cable monkey phone me asking if I particularly wanted these items or if I had made a mistake, which I had they then amended the order and refunded the difference. A very proactive company, with helpful staff who know there products. Would highly recommend.

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Reasons to Buy

WDM Bi-Directional SFP Module
Supports WDM Bi-Directional technology, using a single strand of fiber, cost saving
Pairing with TL-SM321A or MC111CS
Compatible with T3700 series, T2700 series, T2600 series, T2500 series, T1700 series, T1600 series, T1500 series, 2/3/5 series switches and MC220L

TP-LINK´s TL-SM321B adopts the latest standard 1000Base-BX, transmission over a single strand of fiber, with one different wavelength going in each direction. You can extend the network distance up to 10Km(6.2 miles) with TP-LINK´s Routers, Switches, Media Converters to provide high speed and stability.

Certification	FCC, CE
Depth	14.6 mm
Fiber optic connector	LC
Height	12.9 mm
Interface type	SFP
Maximum data transfer rate	1250 Mbit/s
Maximum transfer distance	1000 m
Networking standards	IEEE 802.3z
Operating relative humidity (H-H)	10 - 90%
Operating temperature (T-T)	0 - 70 °C
Package height	38.5 mm
Package weight	60 g
Package width	81.5 mm
Quantity per pack	1 pc(s)
Source data-sheet	Icecat.biz
Storage relative humidity (H-H)	5 - 90%
Storage temperature (T-T)	-40 - 80 °C
User guide	Yes
Width	55.4 mm
Fiber cable diameters supported (core/cladding)	9/125 µm
Harmonized System (HS) code	85369010
SFP transceiver standard	BX
Compliance certificates	RoHS