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TL-FC311A-3

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TP-Link TL-FC311A-3 is a Gigabit single-mode single-fiber media converter that converts RJ45 Ethernet traffic to an SC optical link for transmission up to 3 km.
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Technical specifications for TL-FC311A-3

  • Manufacturer:
    TP-Link
  • Part Number:
    TL-FC311A-3
  • Product Family:
    TP-Link
  • Product Type:
    Gigabit Single-Mode Single-Fiber Media Converter
  • Stock:
    1
  • Copper Port:
    1 x 100/1000 Mbps RJ45
  • Optical Port:
    1 x 1.25 Gbps SC
  • Fiber Type:
    9/125 µm single-mode
  • Maximum Fiber Distance:
    3 km
  • Transmit Wavelength:
    1550 nm
  • Receive Wavelength:
    1310 nm
  • Recommended Pair:
    TL-FC311B-3
  • Average Transmit Power:
    -17 to -6 dBm
  • Receiver Sensitivity:
    -22 dBm
  • Full-Duplex Port Rate:
    2 Gbps
  • Packet Forwarding Rate:
    3 Mpps
  • MAC Address Table:
    2K
  • Internal Buffer:
    1 Mbit
  • Power Input:
    5 V DC / 0.4 A; up to 12 V input
  • Operating Temperature:
    -20 to 60 °C
  • Weight:
    0.4409 lbs (0.2 kg)
  • Estimated shipping dimensions:
    11.50x10.00x5.00cm
  • Tariff Code:
    85176299
  • Country of origin:
    China
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals WDM Pairing Copper Link Optical Budget Fault Checks

Features:

  • Converts one adaptive Gigabit RJ45 connection into one SC optical link.
  • Uses 1550 nm transmit and 1310 nm receive wavelengths on a single fibre.
  • Carries Ethernet traffic across up to 3 km of 9/125 µm single-mode fibre.
The copper and optical ports form one point-to-point media-conversion path.

Complementary WDM wavelengths are required at the far end of the same fibre strand.

Link indicators help separate a copper-side negotiation problem from an optical-path problem.

The TP-Link TL-FC311A-3 Gigabit Single-Mode Single-Fiber Media Converter may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
TP-Link TL-FC311A-3 Gigabit Single-Mode Single-Fiber Media Converter Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Matching the two ends of one single-fibre link

  • Local transmit: The unit launches data at 1550 nm through the SC port.
  • Local receive: The same port detects the return signal at 1310 nm.
  • Remote unit: The far converter uses the complementary transmit and receive wavelengths.
  • Single strand: Both traffic directions share one 9/125 µm fibre.

Relating Ethernet negotiation to media conversion

  • RJ45 rate: The copper port adapts to 100 or 1000 Mbps Ethernet.
  • Cable type: Category 5e or better twisted pair carries the electrical link.
  • Link state: Copper Link/Act indicates negotiation and traffic at the RJ45 side.
  • Traffic path: Accepted Ethernet frames are forwarded to the optical interface.

Keeping the three-kilometre path inside its limits

  • Transmit level: Optical output stays within the documented launch-power range.
  • Receiver limit: End-to-end loss must leave sufficient power above -22 dBm sensitivity.
  • Connector loss: Dirty or poorly seated SC interfaces reduce the available margin.
  • Fibre identity: The route uses 9/125 µm single-mode fibre rather than multimode cable.

Separating power, copper and fibre causes

  • Power LED: Confirm the DC supply before investigating either data port.
  • RJ45 LED: Prove local Ethernet negotiation independently of the fibre path.
  • SC LED: Check the optical link, wavelength pairing and remote converter.
  • Loop isolation: Replace or test one cable segment at a time to locate the loss.
Description
TP-Link TL-FC311A-3 is a Gigabit single-mode single-fiber media converter that changes electrical Ethernet traffic from one RJ45 port into an optical signal at one SC port. It extends a copper network across one 9/125 µm fibre for a documented distance of up to 3 km.

The WDM path of TL-FC311A-3 transmits at 1550 nm and receives at 1310 nm, allowing both directions to share the same strand. The far-end converter must use the complementary wavelength pair so its transmitter reaches this receiver and its receiver accepts this transmitter.

At the copper side, TL-FC311A-3 negotiates 100 or 1000 Mbps Ethernet while the optical side runs through the 1.25 Gbps SC interface. Link/Act indicators separate copper and fibre activity, and the power indicator confirms that the DC input is feeding the converter.

Because TL-FC311A-3 has a 3 km optical budget, connector cleanliness, fibre loss and the receive sensitivity determine whether the remote link is stable. The selected power adapter and ambient temperature must remain within the documented limits for the complete unit.
Alternative Names
TLFC311A3 TL FC311A-3 TP-Link TL-FC311A3 TL-FC311A 3 TL-FC311A/3 TPLink TLFC311A3 TL-FC311A-03 TL FC 311A 3
Technical notes
Pair TP-Link TL-FC311A-3 with the documented opposite-wavelength unit and verify single-mode fibre polarity before commissioning.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why will TP-Link TL-FC311A-3 not link with an identical A-side converter?
TP-Link TL-FC311A-3 transmits at 1550 nm and receives at 1310 nm, so the far end needs the complementary TL-FC311B-3 wavelength pair.
What should be checked when the RJ45 LED is on but TL-FC311A-3 has no optical link?
Inspect TL-FC311A-3 fibre type, SC cleanliness, connector seating, route loss and the remote converter wavelength before changing Ethernet settings.
Can TL-FC311A-3 use multimode fibre for a 3 km route?
No. TL-FC311A-3 is specified for 9/125 µm single-mode fibre across its documented 3 km link.
How is the optical margin of TP-Link TL-FC311A-3 evaluated?
Compare TP-Link TL-FC311A-3 transmit power, receiver sensitivity and total fibre and connector loss across the installed route.
Why can TL-FC311A-3 pass 100 Mbps but fail at Gigabit speed?
For TL-FC311A-3, verify Category 5e or better copper wiring, all four pairs, negotiation and the attached Ethernet port capability.
Which indicators help isolate a TL-FC311A-3 outage?
Use the TL-FC311A-3 power, copper Link/Act and fibre Link/Act indicators to separate supply, RJ45 and optical-path faults.