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TP-Link TL-FC111A-20 media converter module with RJ-45 and SC fiber ports

TP-Link

TP-Link TL-FC111A-20 100 Mbps WDM Media Converter 20 km switch module

SKU CH-7JRN-DF27X MPN TL-FC111A-20

Converts 10/100 Mbps copper to single-mode fibre over 20 km using WDM on one strand

  • DetailsStandards and Protocols: IEEE 802.3, IEEE 802.3i, IEEE802.3u
  • Key featuresComplies with 802.3u 10/100Base-TX, 100Base-FX standards Aut
  • Extends network reach up to 20 km over single-mode fiber
  • Single-fiber WDM technology transmits and receives on one strand
  • Auto-negotiation handles half-duplex and full-duplex modes automatically
  • Conforms to IEEE 802.3u 100Base-TX and 100Base-FX standards
  • Pairs with TL-FC111B-20 for complete bidirectional link

What it is and who it serves

The TP-Link TL-FC111A-20 is a 100 Mbps WDM media converter that bridges a 100M RJ-45 copper port and a 100M SC single-mode fibre port. It converts electrical signals to optical signals, extending network reach up to 20 km over 9/125 µm fibre. Network engineers and installers use it to link copper segments with fibre backbones in campus, security or wireless deployments where EMI immunity and distance matter.

Suitable for and not for

This module suits teams that need a cost-effective way to add a single-fibre link up to 20 km using wavelength-division multiplexing, and who can deploy the matching TL-FC111B-20 at the far end. It does not suit installations that require gigabit throughput, multi-mode fibre, dual-strand fibre connectors, or managed switching features such as VLANs or SNMP monitoring.

The deciding specification

The single specification that determines fit is the 100 Mbps WDM single-mode fibre interface with a 20 km range, which dictates the required pairing with a TL-FC111B-20 unit operating on the complementary wavelength.

How it compares

Measured against everything we stock in Switch Modules, Transceivers & Add-Ons, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 95% of the 1,517 comparable items (median $68.99).

Specifications

Product
Brand nameTP-Link
Model nameTL-FC111A-20
Size & build
Shipping weight0.34 kg
Package size203 × 165 × 64 mm

Questions about this item

What does the 100Base-FX standard cap the fibre link at in practice?

The 100Base-FX standard limits the fibre port to 100 Mbps full-duplex, so the link runs at 100 Mbps even though the RJ-45 port can auto-negotiate 10 or 100 Mbps.

What physical fibre connector and cable type does the module need to fit?

It uses an SC connector on 9/125 µm single-mode fibre, so you must patch it with a matching SC-terminated SMF cable.

How is the converter installed, and which pairing step is often missed?

Insert the module into a compatible switch slot, connect the RJ-45 and SC cables, then pair it with a TL-FC111B-20 unit at the far end so the WDM wavelengths match.

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