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#1 Source in low voltage wire and cable. Call us today to learn more about special offers.

10/100 Mbps WDM Media Converter

by TP-Link
SKU: TL-FC111B-20
Various lead times may apply to this product. Please contact us for more details.
FCC Logo CE Logo RoHS Compliant
This unit requires a SFP Transceiver module, which is sold separately.
Please add a compatible transceiver to your order.


What This Product Does

TL-FC111B-20 is a 100M media converter, providing a 100M RJ-45 port and a 100M SC fiber port, which can convert between electrical and optical signals. And long-distance data transmission through optical fiber can be applied to commercial scenarios such as park security monitoring and wireless networking.

How This Product Works

TL-FC111B-20 adopts WDM (wavelength division multiplexing) technology, helping send and receive data at a distance of up to 20km (12.4 miles) over only one fiber, which saves half of the cable deployment cost for customers. TL-FC111B-20 transmits data at 1310nm wavelength and receives data at 1550nm wavelength on optical fiber. The TL-FC111A-20 works in the other end as a pair by receiving data at a wavelength 1310nm and sending data at wavelength 1550nm.



  • Complies with 802.3u 10/100Base-TX, 100Base-FX Standards
  • Auto-negotiation of Half-duplex/Full-duplex Transfer Mode
  • 9/125 μm SMF (Single Mode Fiber)
  • Bidirectional WDM Communication on a Single Fiber
  • Ranges up to 20km (12.4 Miles)
  • Work with TL-FC111B-20 as a Pair




Standards and Protocols

IEEE802.3, IEEE802.3i, IEEE802.3u


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



1× 100 Mbps SC Fiber Port

1× 10/100 Mbps RJ45 Port (Auto MDI/MDIX)

Network Media

100BASE-Tx: 2-pair UTP/STP of Cat. 5 or Above (≤100 m)

Power Supply

External Power Adapter: 5 V/0.6 A


PWR, Link/Act

Dimensions ( W x D x H )

94.5*73*27 mm

Wave Length

1310 nm TX, 1550 nm RX


Standards and Protocols

IEEE 802.3, IEEE 802.3i, IEEE802.3u

Basic Function

Auto-negotiation of Half-duplex / Full-duplex Transfer Mode

Full-duplex Flow Control (IEEE 802.3x)

Half-duplex Flow Control (Backpressure)

Extends Fiber Distance up to 20km (12.4 miles)


1x 100M Single SC/UPC Port

1x 10/100M RJ45 port (Auto MDI/MDIX)


1310 nm


1550 nm

Network Media 10BASE-T

UTP Category 3, 4, 5 Cable (Maximum 100m)

EIA/TIA-568 100Ω STP (Maximum 100m)

Network Media 100BASE-T

UTP Category 5, 5e Cable (Maximum 100m)

EIA/TIA-568 100Ω STP (Maximum 100m)

Network Media 100BASE-FX

Single Mode Fiber

LED Indicators

PWR, Link/Act

Dimensions (W*D*H)

3.7 × 2.9 × 1.1 in.

(95 × 73 × 27 mm)

Power Supply

External Power Adapter: 5 V/0.6 A

Safety & Emission


Fiber Type

9/125 μm Single Mode Fber (≤20 km)


Operating Temperature: 0℃~50℃ (32℉~122℉)
Storage Temperature: -40℃~70℃ (-40℉~158℉)
Operating Humidity: 10%~90% Non-condensing
Storage Humidity: 5%~90% Non-condensing

What’s In The Box

What’s In The Box

  • Media Converter TL-FC111B-20
  • Power Adapter
  • Installation Guide