Spotlight: - WDM Bi-Directional SFP Module - Supports WDM Bi-Directional technology, using a single strand of fiber, cost saving TP-LINK´s TL-SM321A 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 with TP-LINK´s Routers, Switches, Media Converters to provide high speed and stability. - Supports WDM Bi-Directional technology, using a single strand of fiber - TX: 1550nm / RX: 1310nm - Internal +3.3V Power Supply - In pairs with TL-SM321B - Plug-and-Play - Suitable: MC220L, TL-R4199G/4299G, TL-SG3109, TL-SL3428/3452, TL-SG2109WEB/2216WEB/2224WEB,TL-SL2210WEB/2218WEB/2428WEB/2452WEB, TL-SL1351 and the other equivalent devices

Weight & dimensions
Width	55.4 mm
Depth	12.9 mm
Height	12.9 mm
Power
Input voltage	3.3 V
Operational conditions
Operating temperature (T-T)	0 - 70 °C
Storage temperature (T-T)	-40 - 80 °C
Operating relative humidity (H-H)	10 - 90%
Storage relative humidity (H-H)	5 - 90%
Packaging data
Package width	122.5 mm
Package depth	81.5 mm
Package height	38.5 mm
Package weight	60 g
Performance
SFP transceiver type	Fiber optic
Maximum data transfer rate	1250 Mbit/s
Interface type	SFP
Single-mode fiber (SMF) supported	Y
Fiber optic connector	LC (UPC)
Fiber cable diameters supported (core/cladding)	9/125 µm
Maximum transfer distance	10000 m
Tx wavelength (max)	1550 nm
Rx wavelength (max)	1310 nm
Networking standards	IEEE 802.3z
Features
Plug and Play	Y
Certification	FCC, CE