Certificates
Certification	FCC, CE
Features
Plug and Play
Logistics data
Harmonized System (HS) code	85369010
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	81.5 mm
Package depth	122.5 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
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
Single-mode fiber (SMF) supported
Power
Input voltage	3.3 V
Weight & dimensions
Width	55.4 mm
Depth	12.9 mm
Height	12.9 mm

TP-LINK's TL-SM321B uses the 1000Base-BX standard, and operates on a single fiber, with different wavelengths for each direction. This allows you to expand your network up to 10 km in size to connect teams over long distances.