TL-FC311A-20 is a Gigabit media converter with a Gigabit RJ-45 port and a Gigabit SC fibre port that can convert between electrical and optical signals. Long distance data transmission over optical fibre can be applied to commercial scenarios such as parking security monitoring and wireless networks.
The TL-FC311A-20 uses Wavelength Division Multiplexing (WDM) technology, which allows data to be sent and received at a distance of up to 20 km using only a single-mode optical fibre. This saves customers half the cost of cable provisioning. TL-FC311A-20 transmits data at a wavelength of 1550 nm and receives data at a wavelength of 1310 nm on one optical fibre. Therefore, the end device used in conjunction with the TL-FC311A-2 should transmit data at a wavelength of 1310 nm and receive data at a wavelength of 1550 nm. The TL-FC311B-20 media converter is one of the products that can work together with TL-FC311A-20.
In addition, this media converter can be used as a standalone device (no rack required) or with TP-Link’s TL-FC1420 rack for Auto-MDI/MDI-X in the TX port, where the duplex mode is automatically negotiated.

Network
– Standards and protocols: IEEE 802.3, IEEE 802.3i, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3x, IEEE 802.3z
Environment
– Operating temperature: 0˚C to 50˚C (32˚F to 122˚F)
– Storage temperature: -40˚C to 70˚C (-40˚F to 158˚F)
– Operating humidity: 10% to 90% RH non-condensing
– Storage humidity: 5% to 90% RH non-condensing
Hardware features
– Interface: 1x Gigabit SC fibre port, 1x 10/100/1000 Mbps RJ45 port (Auto MDI/MDIX)
– Cable: single-mode fibre optic, UTP category 5, 5e cable (maximum 100 m)
– Power supply: External power supply unit, 5 V/0.6 A
– LED: PWR, link/activity
– Dimensions (WxDxH): 3.7×2.9×1.1 in (94.5×73.0x27.0 mm)
– Wavelength: 1550 nm TX, 1310 nm RX
Media converter and modules
– Fibre type: 9/125 μm single-mode fibre
Miscellaneous
– Package contents: TL-FC311A-20 media converter, power supply unit, installation instructions