TP-Link Omada 10/100 Mbps WDM Media Converter 20 km, 1310 nm TX / 1550 nm RX
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PRODUCT DESCRIPTION
TP-Link 10/100 Mbps WDM Media Converter (TL-FC111B-20) - 5 Years Local Warranty
The TL-FC111B-20 is the "B" half of TP-Link's 20 km Fast Ethernet WDM pair, transmitting at 1310 nm and receiving at 1550 nm across a single single-mode strand. It is the unit that completes a TL-FC111A-20 link, delivering a 10/100 Mbps copper port at the far end of a long fibre run.
A 100 Mbps Link Across Twenty Kilometres
Wavelength Division Multiplexing carries both directions of the link on one strand by using different wavelengths in each direction. The TL-FC111B-20 sends at 1310 nm and receives at 1550 nm over 9/125 µm single-mode fibre terminated in SC/UPC, with a published reach of 20 km (12.4 miles). For a remote gatehouse, a perimeter camera, a pumping station or a satellite office, that is the whole link: one strand and two small converters.
One Strand Instead of Two
Conventional fibre pairs consume two strands per link. On leased dark fibre the difference shows up on the monthly invoice; in a building riser it shows up as the point at which no more links can be added without new cabling. A WDM pair halves that consumption for the same link, which is why it is usually the right specification for anything crossing a boundary someone else controls.
Flow Control and Auto-Negotiation on the Copper Side
The RJ45 port is 10/100 Mbps and Auto MDI/MDIX, negotiating half or full duplex with whatever is plugged in. TP-Link publishes IEEE 802.3x full-duplex flow control and backpressure for half duplex, which is what keeps a burst from a faster device being silently discarded when the two ends have different buffering. There is nothing to configure: the converter adapts rather than requiring settings to be matched by hand.
Confirm the Wavelength Before Ordering
WDM converters are directional and sold individually. This is the B unit: 1310 nm transmit, 1550 nm receive. The far end must be an A unit doing the reverse at the same distance rating, and TP-Link states this model operates as a pair with the TL-FC111A-20. Two B units will not bring a link up. If you are adding to an existing installation, send us the model already on site and we will confirm the correct partner.
Ideal For
Singapore integrators running 100 Mbps links to cameras, gates, car parks and remote plant rooms over single-mode fibre, businesses connecting a satellite building to the main site, and IT teams completing an existing TL-FC111A-20 installation. Supplied by SourceIT with local Singapore warranty, GST invoice and project pricing on request.
TL-FC111B-20 Datasheet — Technical Specifications
General
| Model | TL-FC111B-20 |
| Official Product Name | 10/100 Mbps WDM Media Converter |
| Brand | TP-Link Omada |
| Warranty | 5 Years Local Warranty (Singapore) |
Specifications
| Standards and Protocols | IEEE 802.3, IEEE 802.3i, IEEE 802.3u |
| Basic Function | Auto-negotiation of half-duplex/full-duplex transfer mode; full-duplex flow control (IEEE 802.3x); half-duplex flow control (backpressure); extends fibre distance up to 20 km (12.4 miles) |
| Interface | 1x 100M single SC/UPC port; 1x 10/100M RJ45 port (Auto MDI/MDIX) |
| WDM TX | 1310 nm |
| WDM RX | 1550 nm |
| Fibre Type | 9/125 micron single-mode fibre (max 20 km) |
| Network Media 10BASE-T | UTP category 3, 4, 5 cable (maximum 100 m); EIA/TIA-568 100 Ohm STP (maximum 100 m) |
| Network Media 100BASE-T | UTP category 5, 5e cable (maximum 100 m); EIA/TIA-568 100 Ohm STP (maximum 100 m) |
| Network Media 100BASE-FX | Single-mode fibre |
| Power Supply | External power adapter: 5 V/0.6 A |
| LED | PWR, Link/Act |
| Safety & Emission | FCC, CE, RoHS |
| Dimensions (W x D x H) | 3.7 x 2.9 x 1.1 in (95 x 73 x 27 mm) |
| 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 |
| Package Contents | Media Converter TL-FC111B-20, Power Adapter, Installation Guide |
Specifications are reproduced from TP-Link's published TL-FC111B-20 page. TP-Link prints the dimensions twice on that page, as 95 x 73 x 27 mm and as 94.5 x 73 x 27 mm; the first is shown above and the discrepancy is noted rather than resolved. No maximum power consumption, EAN or carton pack size is published for this model, so none is stated here.
Compatibility & Software Support
The TL-FC111B-20 is an unmanaged media converter. It is a transparent copper-to-fibre bridge with no controller, no web interface and no configuration.
| Omada SDN Controller | Not supported — this model cannot be adopted into an Omada Software, Hardware or Cloud-Based Controller and does not appear in the controller as a managed device |
| Omada App | Not supported |
| Management | None — unmanaged, plug and play. Status is read from the front-panel LEDs |
| Required Partner Unit | A WDM converter transmitting at 1550 nm and receiving at 1310 nm. TP-Link states this model operates as a pair with the TL-FC111A-20 |
| Fibre Plant | One strand of 9/125 micron single-mode fibre, SC/UPC connector, up to 20 km |
| Switch Compatibility | Any 10/100 Mbps Ethernet switch or router port, including Omada and JetStream switches |
Package Contents & Ordering Information
What's in the Box
| Package Contents | Media Converter TL-FC111B-20, Power Adapter, Installation Guide |
Ordering Information
| Model | TL-FC111B-20 |
| Brand | TP-Link Omada |
| Warranty | 5 Years Local Warranty (Singapore) |
| Ordering Note | Sold as a single unit. A complete link needs this B unit at one end and a 1550 nm TX / 1310 nm RX A unit of the same distance rating at the other |
| Availability | Availability on this model is limited. Confirm current stock and lead time with SourceIT before committing to a project date |
TP-Link does not publish an EAN or carton pack size for this model.
Datasheet & Downloads
Frequently Asked Questions — TL-FC111B-20
Which unit goes at the other end?
One that transmits at 1550 nm and receives at 1310 nm. TP-Link states this model operates as a pair with the TL-FC111A-20. Two B units will not link to each other.
How is this different from the TL-FC111PB-20?
The TL-FC111PB-20 shares the same wavelengths and 20 km reach but adds PoE output on its copper port, so it can power a camera or access point at the far end. This model does not supply power.
Can it be managed from the Omada Controller?
No, and it cannot be adopted into one. The converter is unmanaged and transparent, and does not appear in Omada SDN.
What warranty does SourceIT provide?
Five years local Singapore warranty, under TP-Link's replacement warranty policy for media converters. Every TL-FC111B-20 sold by SourceIT comes with a GST invoice.
Is stock held locally?
Availability on this model is limited. Ask us to confirm current stock and lead time before you commit to a project date, and we can quote an equivalent current model if the timing does not work.
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