SFP Module: TP-LINK TL-SM311LS (1000Base-SX, SMF 10km, 2xLC)



This optical module is compliant with SFP (Small Form-factor Pluggable / Mini GBIC) standard. It is an optional piece of equipment for TP-LINK managed/web smart switches, for extending transmission distance through the use of optical fibers. The module works with two single-imode optical fibers (in duplex mode). The maximum transmission distance is 10 km.
The SFP optical module uses LC connectors. The main advantages of LC connectors are small size and locking system protecting against accidental disconnection.
The use of media converters with the possibility of exchanging SFP modules is particularly advantageous when it comes to network configuration changes. Instead of replacing the entire unit/s, it is sufficient to exchange the SFP transceiver/s.
Some devices with SFP interface:
TL-SG3109/3216/3224, TL-SL3428/3452, TL-SG2109WEB/2216WEB/2224WEB, TL-SL2210WEB/2218WEB / 2428WEB/2452WEB, TL-SL1351.
Distinguishing features:
  • duplex transmission with the use of two single-mode fibers,
  • transmission range up to 10 km,
  • LC optical connectors.


Product type SFP module
Brand TP-Link
Name TL-SM311LS
Module type SFP
Transmission type Duplex – 2 fibers
Fiber optic type Single-mode
speed MBps 1000
connector type LC/PC duplex
Maximum transmission range km 10
wavelength Tx nm 1310
Rx nm 1310
Power supply DCV 3.3 (from SFP port)
Operating temperature °C 0...+70